Answer:
107
Step-by-step explanation:
These are easier to do if you simplify them first.
... = x^6(5 -2 -3) +x^2(-3 +4) +7
... = x^2 +7
For x = -10, this is
... (-10)^2 +7 = 100 +7 = 107
A geometric sequence is shown below 2,-6,18,-54,162,... part A: what a recursive relationship for this sequence. Explain how you determined your answer part B: write an explicit formula for this sequence
A) The problem statement tells you it is a geometric sequence, so you know each term is some multiple of the one before. The first terms of the sequence are given, so you know the first term. The common ratio (the multiplier of interest) is the ratio of the second term to the first (or any term to the one before), -6/2 = -3.
So, the recursive definition is ...
... a_1 = 2
... a_n = -3·a_(n-1)
B) The explicit formula is, in general, ...
... a_n = a_1 · r^(n -1)
where r is the common ratio and a_1 is the first term. Filling in the known values, this is ...
... a_n = 2·(-3)^(n-1)
Answer:
a1=2
an=(an-1)(-3)
Step-by-step explanation:
Hope it helps. :)
In one year, a bird farm sold 375 total chickens. of these, there were 37 more Cornish hens than turkeys. How many Cornish hens and how many turkeys were sold?
Answer:
206 Cornish hens
169 turkeys
Step-by-step explanation:
Let c represent the number of Cornish hens sold. Then c-37 is the number of turkeys sold. The total sales would be ...
... c + (c-37) = 375
... 2c = 412 . . . . collect terms, add 37
... c = 206 . . . . Cornish hens sold
... (c-37) = 169 . . . turkeys sold
_____
Comment on this type of problem
Note that the solution to this problem is that the larger number (number of cornish hens) is half the sum of the total and the difference: (375+37)/2 = 206. This is the general solution for this type of "sum and difference" problem.
The larger contributor is half the total plus half the difference; the smaller contributor is half the total minus half the difference.
Cornish hens = (1/2)(375 +37) = 206
Turkeys = (1/2)(375 -37) = 169
Bryan purchases a new boat. The expression below represents the value of the boat after x years. 22000(0.88)^(X+2)
Which statement is true?
The price of the boat decreases by 88% every year.
The price of the boat increases by 88% every year.
The price of the boat decreases by 12% every year.
The price of the boat increases by 12% every year.
None of the above. All the answers refer to price. The given equation refers to value. We imagine price may stay the same or actually increase year-to-year. The problem statement gives insufficient information to conclude anything about price.
Math is about attention to detail. The equation tells you ...
... The value of the boat decreases by 12% every year.
Step-by-step explanation:The value of the boat is multiplied by 0.88 each time X increases by 1. That means the value is 88% of what it was the year before, a decrease of 12%.
Solve the inequality) 3a - 4 < 5 (line under greater or less then) As you solve the problem, do it with numbers instead of the word form, for example, 1+1=2 instead of one plus one equals two.
a ≤ 3
Step-by-step explanation:Undo what is done to the variable. The variable is multiplied by 3 and 4 is subtracted from that result. To undo these operations, you add 4, then divide by 3.
... 3a ≤ 9 . . . . 4 is added to both sides of the inequality
... a ≤ 3 . . . . . both sides of the inequality are divided by 3
_____
Comment on solving inequalities
These are the same steps you would use to solve the 2-step equation ...
... 3a -4 = 5
The only difference between solving equations and solving inequalities is that when you multiply or divide by a negative number, you reverse the sense of the comparison (> becomes <, and vice versa; ≥ becomes ≤, and vice versa). You can see this if you consider numbers: 2 > 1. Multiplying by -1 gives -2 < -1.
Please help!!!!! I attached the picture of the full question
Drag each value to the correct location on the tree diagram. Not all values will be used.
$90 $27.84 $66.32 $46.8 $38.48 $29.12 $31.24
See the attachment
Step-by-step explanation:The expected value of store card transactions will be the product of their average value ($58) and their probability of occurrence (48%).
... $58 × 0.48 = $27.84
Transactions are either "store card" or "without a store card", so the probability of a transaction being made without a store card is
... 1 - 0.48 = 0.52
Using the same computatation as for store card expected value, the expected value of transactions made without a store card is ...
... $74 × 0.52 = $38.48
The expected value of the store's transactions is the sum of the expected values of the different ways transactions can be made:
... $27.84 +38.48 = $66.32
_____
The average value of transactions made without a store card is the weighted average of those made with another card and those made with cash or a gift card. Using c to represent the latter, this weighted sum is ...
... 74 = 0.80 × 70 + 0.20 × c
... 74 -56 = 0.20c . . . . . subtract 56
... 18/0.2 = c = 90 . . . . . divide by the coefficient of c
The average transaction made with cash or a gift card is $90.
Each expected value per transaction should be matched to the correct location on the tree diagram as shown in the image below.
How to determine the expected value per transactions?In this exercise, we would use probability to make each of the decisions. The expected value for transactions made with a store card can be determined by multiplying its probability of occurrence (48%) by the average value ($58) as follows;
Expected value per transaction = 58 × 0.48
Expected value per transaction = $27.84
Since transactions are either made with a store card or without a store card, the probability of a transaction being made without a store card is given by;
Probability (without a store card) = 1 - 0.48 = 0.52
In this context, the expected value per transactions made without a store card is given by;
Expected value per transaction = 74 × 0.52
Expected value per transaction = $38.48
... $74 × 0.52 = $
For the store's expected value transactions, we would add each of the expected values calculated above;
Store's expected value transactions = 27.84 + 38.48
Store's expected value transactions = $66.32.
The average transaction value for transactions that are made with cash or a gift card can be calculated by finding the weighted average of all transactions made without a card;
74 = (0.80 × 70) + 0.20 × m
74 = 56 + 0.20m
0.20m = 74 - 56
0.20m = 18
m = 18/0.20
m = $90.
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Evaluate f(3) x(5x-9)
I think I have the answer just now sure thanks if you can help
18
Step-by-step explanation:Put 3 where x is, then do the arithmetic.
... f(x) = x(5x -9)
... f(3) = 3(5·3 -9) = 3(15 -9) = 3·6
... f(3) = 18
_____
Your calculator can do this, too.
You and your friend leave your houses at the same time to meet at a restaurant. The distance (in miles) your friend is from the restaurant is given by y=-70x+140,where x is the number of hours since your friend left home. You live 80 miles from the restaurant and arrive at the same time as your friend. Write a linear equation that represents your distance from the restaurant.
Answer:
y = 80 -40x
Step-by-step explanation:
The given equation shows the friend arrives at the restaurant (y=0) when x=2. That is, half the initial distance to the restaurant is covered in each hour of travel time.
If I take 2 hours to travel the 80 miles from my house, my distance will decrease at the rate of 40 miles per hour. My distance from the restaurant can be represented by ...
... y = -40x +80
What transformations change the graph of f(x) to the graph of g(x)? f(x) = 3x2 g(x) = 9x2 - 4
Question 2 options:
The graph of g(x) is the graph of f(x) stretched vertically by a factor of 1/3 and translated up 4 units.
The graph of g(x) is the graph of f(x) stretched vertically by a factor of 1/3 and translated down 4 units
. The graph of g(x) is the graph of f(x) stretched vertically by a factor of 3 and translated up 4 units.
The graph of g(x) is the graph of f(x) stretched vertically by a factor of 3 and translated down 4 units.
Answer:
D.
Step-by-step explanation:
The coefficient of the leading term tells you how "stretchy" a graph is. Since g(x)'s leading coefficient is 3, and f(x)'s leading coefficient is 9, and they're both [tex]x^{2}[/tex], g is just 3 times f. Then g's constant term is -4, and f's constant term is 0, then g is just f but translated 4 down.
Answer:
Option 4
Step-by-step explanation:
The 3 changing to the 9 stretches the graph vertically by a factor of 3. The - 4
translates the graph 4 units down .
Its Option 4
The equation C = 5/9(F - 32) is used to convert between Fahrenheit temperatures and Celsius temperatures. The temperature in Augusta on a summer day is 33° C.
Rounded to the nearest whole number, what is the temperature in Fahrenheit?
A) 55°F
B) 68°F
C) 79°F
D) 91°F
Answer:
D) 91 °F
Step-by-step explanation:
C = 5/9(F - 32)
33 = 5/9 (F – 32) Multiply each side by 9
9×33 = 5(F- 32) Divide each side by 5
9×33/5 = F – 32 Add 32 to each side
F = 9×33/5 + 32
F = 59.4 + 32
F = 91 °F
Answer:
Its D
Step-by-step explanation:
USA TP
Mr. O'Brien is paid $7.30 per hour for the first 40 hours he works in a week. he is paid 1.5 times that rate for each hour after that.
Last week, Mr O'Brien work 44 hours he says he earned $321.20 last week do you agree?
f(x) = (x+2)(x-1)(2x+3)
Which statements are true? (Graph is pictured)
Select ALL that apply
A)The end behavior of functions f(x) and g(x) are exactly the same.
B)Both functions have exactly three x-intercepts.
C)The function f(x) is an odd degree function.
D)The function g(x) has a positive leading coefficient.
E)The x intercepts for g(x) are (1, 0); (2, 0) and (-3/2, 0)
Answer:
B) Both functions have exactly three x-intercepts.
C) The function f(x) is an odd degree function.
E) The x intercepts for g(x) are (1, 0); (2, 0) and (-3/2, 0)
Step-by-step explanation:
The function f is a function of degree 3 (there are 3 x-terms in the product contributing to the highest-degree term), so is of odd degree. The leading coefficient in f(x) is the product of the coefficients of x: 1·1·2 = 2, a positive number.
For a polynomial function of odd degree, the general shape of the graph will be "/" if the leading coefficient is positive, and "\" if the leading coefficient is negative. That is, end behaviors will be opposites of each other. Function f has a positive leading coefficient, so its end behavior will be (-∞, -∞) and (+∞, +∞). Function g has end behavior that is (-∞, +∞) and (+∞, -∞), so is not the same. Apparently, g(x) has a negative leading coefficient.
The graph of g(x) shows it to have 3 x-intercepts. They can be read from the graph as (-3/2, 0), (1, 0) and (2, 0). The factoring of f(x) shows it to have 3 x-intercepts, the same number. There is an x-intercept of f(x) for each factor. (The x-intercept value is the value of x that makes the factor zero.)
The function f(x) is of odd degree and has three x-intercepts at -2, 1, and -3/2. The statements regarding the function g(x) cannot be confirmed without further information.
Explanation:The function given is f(x) = (x+2)(x-1)(2x+3). The degree of the function is 3 as there are three terms multiplied together. Therefore, f(x) is an odd degree function, which makes option C correct.
The x-intercepts of the function occur where y = 0, i.e. where f(x) = 0. Solving this will give the roots or intercepts for x which are -2, 1, and -3/2. This means that the function f(x) has three x-intercepts, which makes option B correct.
Without information or a graph of function g(x), we cannot accurately answer options A, D and E. We cannot know the end behavior, the leading coefficient or the x intercepts for g(x). Therefore, only options B and C are true statements.
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Liam volunteers to help plan the event. The first month, he volunteered for x hours. The next month he volunteered for 1 2/3 times as many hours as he had the first month. If he volunteered for a total of 40 hours, how many hours did he volunteer during the first month? Write an equation to represent the situation and solve.
To find the number of hours Liam volunteered during the first month, we can set up an equation using the given information. By solving the equation, we find that Liam volunteered for 15 hours during the first month.
Explanation:To solve this problem, we can start by representing the number of hours Liam volunteered in the first month as x. The number of hours volunteered in the next month would be 1 2/3 times x, which can be written as (5/3)x. The total number of hours volunteered is given as 40, so we can write the equation: x + (5/3)x = 40. To solve for x, we can combine the like terms and solve the resulting equation.
Combining the x terms, we get (8/3)x = 40. Solving for x, we divide both sides of the equation by 8/3: x = 40 / (8/3).
Simplifying, we have x = 40 * (3/8) = 15. Therefore, Liam volunteered for 15 hours during the first month.
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By representing the number of hours in the first month as x, we can find the value of x by using the given information and solving the equation. The solution shows that Liam volunteered for 15 hours during the first month.
Explanation:To solve this problem, we can set up an equation representing the total number of hours Liam volunteered. Let's represent the number of hours he volunteered in the first month as x. According to the problem, he volunteered for 1 2/3 times as many hours in the next month. So, the number of hours he volunteered in the next month is 1 2/3 x. The total number of hours is given as 40. Therefore, we have the equation:
x + 1 2/3 x = 40
To solve for x, we can simplify the equation by converting 1 2/3 to an improper fraction. This gives us:
5/3 x + 1 2/3 x = 40
Combining like terms, we get:
8/3 x = 40
To solve for x, we can multiply both sides of the equation by the reciprocal of 8/3, which is 3/8. This gives us:
x = (40)(3/8) = 15
Therefore, Liam volunteered for 15 hours during the first month.
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Ally and Beth are at the grocery store. Ally buys a container of milk for $4 and 4.75 pounds of apples. Beth buys a box of cereal for $3 and 5.55 pounds of apples. If the girls spend the same amount, how much does 1 pound of apples cost?
Answer:
$1.25
Step-by-step explanation:
Use your classmates to write 5 or more ratios. For example, you could compare boys to girls or people with glasses to people without glasses.
Answer:
1/3 3/1 5/6 6/5 8/9 9/8
Step-by-step explanation:
I need help answering this question
21 miles
Step-by-step explanation:Big Bird's nest is halfway between Bert's place and Ernie's place, so the distance from the nest to either apartment is the same. Equating those distances, we have ...
... 5x +4 = 15x -30
... 34 = 10x . . . . . . add 30-5x
... 3.4 = x . . . . . . . .divide by 10
The value of x is not the distance. The distance is given by either of the two expressions
5x+415x-30Using the first of these, the distance from either apartment to Big Bird's nest is ...
... 5·3.4 +4 = 17 +4 = 21 . . . . miles
Of course, using the second gives the same answer:
... 15·3.4 -30 = 51 -30 = 21
Write the expression as a difference of a monomial and a trinomial: 2a^4+5a^3-2a^2+4
(2a^4+5a^3+4) -2a^2
Step-by-step explanation:There are 4 terms. Your trinomial could consist of any three of them. Here, we've chosen to use the one with the negative sign as the monomial, because the question asks for a difference.
jim leaves his house traveling at 200 feet per hour, he wants to travel 400 yards to get to 4:00pm. How many hours does he need to travel? Answer and explain your answer.
I'm giving brainliest for the best answer.
A. 2 hours
B. 4 hours
C. 5 hours
D. 6 hours
Answer:
D. 6 hours
Step-by-step explanation:
There are 3 ft in 1 yd, so 400 yd = 1200 ft.
At 200 ft/h, Jim's travel time for 1200 ft will be
... time = distance/speed = (1200 ft)/(200 ft/h) = (1200/200) · ft · (h/ft)
... time = 6 h
A farmer wants to build a fence enclosing a rectangular region bordering a river. If the farmer has 500 feet of fencing, find the maximum area that can be enclosed.
Answer:
31,250 ft²
Step-by-step explanation:
Let x represent the length of fence parallel to the river. Then the ends of the rectangle will have dimesion (500-x)/2, and the total area will be ...
... A = x(500-x)/2
This function describes a parabola with zeros at x=0 and x=500. The vertex (maximum) will be located halfway between these, at x=250.
The maximum size pen has area ...
... A = 250(500 -250)/2 = 31,250 . . . . sq ft
Kohls is offering a special discount promotion. A merchandise order totaling less than $25 will receive a 25% discount, and an order totaling $25 or more will receive a 50% discount. Which of these correctly describes purchases made at the store during this promotion? Select all that apply.
A A purchase of 3 pairs of socks selling for $4 a pair will be charged as $9 after the promotion is applied.
C A purchase of 3 pairs of skirts selling for $8 each will be charged as $6 after the promotion is applied.
D A purchase of 3 video games selling for $32.45 each will be charged as $48.68 after the promotion is applied.
B A purchase of 1 pair of shoes selling for $78 will be charged as $58.50 after the promotion is applied.
Lisa completed the table to describe the product of a mystery one-digit factor and each number.
× 1 2 3 4 5
? even even even even even
Part A Give all of the possible numbers that could be Lisa’s mystery one-digit factor.
Part B Explain how you know that you have selected all of the correct possibilities.
Part A.
We're only told that the product of the mystery factor and the number shown is even. This is true when the number shown is odd as well as even, hence the mystery factor is even.
There are no other conditions on the product that might limit the value of the mystery factor (non-zero, or < 10, for example).
Hence, the mystery factor could be any single-digit even number. In our base-10 number system, there are 5 of them: {0, 2, 4, 6, 8}.
___
Part B.
There are only 5 even single-digit numbers in our base-10 number system, so by choosing 5, I know I have all of them.
Whose beaker has the least amount of liquid in it.
Jay 0.8
Alana 1.05
Evan 1.2
Stacey 0.75
What is the best approximation of the length of segment QS? (Note: cos 80° = 0.17)
(Round your answer to the nearest tenth.)
Answer: [tex]QS=11.8cm[/tex]
Step-by-step explanation:
1. You have the following information:
- The lenght of [tex]RS[/tex] is 2 centimeters.
- The angle m∠S=80°.
- Cos80°=0.17
2. Therefore, you can calculate the lenght of the segment [tex]QS[/tex] as following:
[tex]cos80=\frac{adjacent}{hypotenuse}[/tex]
[tex]adjacent=2cm\\hypotenuse=QS\\cos80=0.17[/tex]
3. Substitute values and solve for [tex]QS[/tex]:
[tex]0.17=\frac{2cm}{QS}\\QS=\frac{2cm}{0.17} \\QS=11.76cm[/tex]
4. To the nearest tenth:
[tex]QS=11.8cm[/tex]
Find a polynomial, which if substituted for M will make the equation an identity: (4c^2–7c^2+6)–M=0
Answer:
-3c^2 +6
Step-by-step explanation:
The equation will be an identity (0=0) when M is equal to the contents of the parentheses. That polynomial can be used directly, or it can be simplified by combining the c^2 terms.
The contents of parentheses simplify as follows:
... (4c^2 -7c^2 +6) = (c^2(4 -7) +6) = (-3c^2 +6)
Answer:
4c^4-7c^2+6
Step-by-step explanation:
f(x)=log5 (2x+12)+2 yeah this ome threw me off
Answer:
See below for a graph
Step-by-step explanation:
Let's call the parent function g(x) = log₅(x), which has a vertical asymptote at x=0, and goes through the points (1, 0), (5, 1), (25, 2).
Then this function is
... f(x) = g(2(x+6)) +2
That is, the function is horizontally compressed by a factor of 2, shifted left 6 units, and shifted up 2 units. This moves the points listed above to ...
... (-5.5, 2), (-3.5, 3), (6.5, 4)
The graph shows the parent function and the listed points in blue, then the transformed function and the corresponding points in red.
could the triangle be classified as a right triangle?
as you recall from the pythagorean theorem, which applies only to right-triangles, c² = a² + b².
so, a = 6, b = 8, c = 9...... if that triangle is indeed a right triangle, then 9² = 6² + 8², let's check if that's true.
[tex]\bf \textit{using the pythagorean theorem} \\\\ c^2=a^2+b^2\implies c=\sqrt{a^2+b^2} \qquad \begin{cases} c=\stackrel{hypotenuse}{9}\\ a=\stackrel{adjacent}{6}\\ b=\stackrel{opposite}{8}\\ \end{cases} \\\\\\ 9=\sqrt{6^2+8^2}\implies 9=\sqrt{36+64}\implies 9=\sqrt{100}\implies 9\ne 10~~\bigotimes~~nope[/tex]
In trapezoid ABCD with bases AB and DC , diagonals intersect at point O. Find the length of diagonal BD , if BO=6 cm and: AO/OC = 3/1
Answer:
8 cm
Step-by-step explanation:
... BO/OD = AO/OC = 3/1
Written another way, this is ...
... OD : BO = 1 : 3
Now, BD = OD + BO, so we have
... BD : BO = (OD +BO) : BO = (1 +3) : 3 = 4 : 3
That is, BD = 4/3 × BO
... BD = 4/3 × 6 cm = 8 cm
To find the length of diagonal BD in trapezoid ABCD, we set up an equation using the fact that the diagonals bisect each other. We solve for x and then substitute it into the equation for BD.
Explanation:To find the length of diagonal BD in trapezoid ABCD, we can use the fact that the diagonals of a trapezoid bisect each other. Let AO = 3x and OC = x. Since the diagonals intersect at point O, we can set up the equation (3x + 6) / x = 3 / 1. Solving for x, we find that x = 1.5. Therefore, BD = 2 * x + 6 = 2 * 1.5 + 6 = 9 cm.
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You are tired at the end of the term and decide to borrow $500 to go on a trip to whatever land. You go to the bank and borrow the money at 11% for 2 years. A) find the interest you will pay on the loan. B) how much will you have to pay the bank at the end of the two years ?
Answer:
A)55
B)110
Step-by-step explanation:500 /11%=55
55*2=110
The interest is $110 and the amount paid to the bank is $610.
What is simple interest?Simple interest is calculated just on the loan's principal amount, whereas compound interest is calculated on both the principal and the cumulative interest.
It is given that you decide to borrow $500 to go on a trip to whatever land. You go to the bank and borrow the money at 11% for 2 years.
A. The simple interest is,
SI = ( Principle x rate x time ) / 100
SI = ( 500 x 11 x 2 ) / 100
SI = $110
B. The amount paid to the bank after 2 years is,
Amount = P + SI
Amount = $500 + $110 = $610
Therefore, the interest is $110 and the amount paid to the bank is $610.
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(I WILL GIVE YOU BRAINLIEST AND ANSWER ALL YOU CAN IDC) a market researcher tracks the number of people who visits a company's web site each month. the tables shows the data from the last five months of the year.
month web site visitors (thousands)
8 5.74
9 12.00
10 25.07
11 52.40
12 109.42
Part A: which type of function (linear or exponential) best models this situation. EXPLAIN
Part B: describes the approximate monthly growth demonstrated in the table USING WORDS.
Part C: assuming that the growth rate was the same for the entire year, give me an estimate of the number of visitors to the website for month 7. SHOW WORK OR EXPLAIN
Part A: The exponential function is the best model for the given data. The data shows that every month the number of visitor approximately doubles from previous month. In other words the number is some base value (2, in this case) with the number of month (t) being in the exponent. This the a key characteristic of an exponential growth.
Part B: (also explained above). Every month the number of visitors approximately doubles. Starting with 5.74 at month 8, the numbers goes up by about the same amount to 12.0 at month 9. At month 10, a similar increase occurs (doubling would be 24, and the data shows 25, so this is all "aproximate"). This trend continues throughout the table.
Part C:
Month 7 will be estimated as half of month 8 (going backward):
Month 7: 5.74/2=2.87
Estimate for month 7 = 2.87 thousand visitors.
Which line shows the first error in the solution?
A number divided by 3 is four more than -11. What is the number?
x/ + 4 = -11 (1)
x/3 + 4 -4 = -11 -4 (2)
x/3 = -15 (3)
x/3 x 3 = -15 x 3 (4)
x = -45 (5)
A. Line
B. Line 3
C. Line 4
D. Line 2
The first line.
Step-by-step explanation:If we let x represent "a number", then "a number divided by 3" is x/3. The denominator is missing on the first line.
Further, this "is 4 more than -11", so is = 4 + (-11). The constant 4 is on the wrong side of the equal sign in line 1.
_____
The solution should be ...
... x/3 = 4 + (-11)
... x = 3·(-7)
... x = -21
___
Check
-21 divided by 3 is -7. That is 4 more than -11.
(7x^3y^2)(4x^3y^2)
^=exponents
solve in scientific Notation
(2.8×10¹)x⁶y⁴
Step-by-step explanation:Multiplication can be done in the usual way, then the number converted to scientific notation. Scientific notation does not apply to the variables.
[tex](7x^3y^2)(4x^3y^2)=(7\cdot 4)x^{3+3}y^{2+2}=28x^6y^4\\\\=2.8\cdot 10^1x^6y^4[/tex]
_____
If you write the numbers in scientific notation to start, then do the multiplication, the effect is virtually the same: an adjustment is needed in the product to get it back to scientific notation.
(7)(4) = (7×10⁰)(4×10⁰) = 7·4×10⁰⁺⁰ = 28×10⁰ = 2.8×10¹