Answer:
-10
Step-by-step explanation:
Write out the equation
5n-8=n-48
move like terms to the same side
4n=-40
divide 4n and 4 by 4 to get n by itself.
n=-10
The number is -10.
What is equation?An equation is a mathematical statement with an 'equal to' symbol between two expressions that have equal values.
For example, 3x + 5 = 15.
Given,
Eight less than 5 times a number is 48 less than the number
Let the number be x
then statement can be written as
5x - 8 = x - 48
5x - x = - 48 + 8
4x = -40
x = 40/4
x = -10
Hence, -10 is the number.
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Diego’s current age is five times Martina’s age ten years ago. If Martina is currently m years old, what is Diego’s current age in terms of m?
Answer:
5m-50
Step-by-step explanation:
Let Diego current age be x,
Given that Diego’s current age is five times Martina’s age ten years ago
Martina current age = m years
10 years ago Martina's age = m-10
Hence we have
x = 5(m-10) = 5m-50
So we find that Diego's current age can be expressed in terms of m as
Deigo's current age= 5m-50
Verify:
Deigo current age = 5m-50
Hence Martina age 10 years ago = 5m-50 divided by 5 = m-10
Martina current age = m-10+10 = m
Verified.
The current age of Diego in terms of m is expressed as: [tex]5m - 50[/tex]
How to form mathematical expression from the given description?You can represent the unknown amounts by the use of variables. Follow whatever the description is and convert it one by one mathematically. For example if it is asked to increase some item by 4 , then you can add 4 in that item to increase it by 4. If something is for example, doubled, then you can multiply that thing by 2 and so on methods can be used to convert description to mathematical expressions.
For the given condition, we can take Diego's current age represented by a symbol.
Let current age of Diego be: D yearsIt is given that the current age of Martina = m yearsMartina's age 10 years ago = m - 10 yearsThen, converting the statement "Diego’s current age is five times Martina’s age ten years ago." in mathematical terms,
Diego's current age = 5 times (Martina's age 10 years ago)
[tex]D = 5 \times (m - 10)\\\\or\\\\D = 5m - 50[/tex]
( sign of multiplication is often hidden if there are non numeric symbols and numbers being multiplied are written together)
Therefore, The current age of Diego in terms of m is expressed as: [tex]5m - 50[/tex]
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change the percent to a fraction 1/27%
if the population of a certain city increased by 25% in two years, the new population was what percent of the old?
Answer:
125%
Step-by-step explanation:
The old population was 100% of the old population since 100% means a whole amount.
Since the population increased by 25%, the new population is 125% of the old population.
All the members of a construction crew work at the same pace. Four of them working together are able to pour concrete foundations in 32 hours. How many hours would this job take if the number of workers:
Increased 2 times
Increased 4 times
Answer:
1) Increased by 2 times then 16 hours
2) Increased by 4 times then 8 hours
Step-by-step explanation:
Given :-
==> 4 construction crew members need 32 hours to pour concrete foundations.
==> All the members work at a same pace.
1) If the numbers of workers are increased by 2 time i.e., 4 workers × 2 = 8 workers. It would take half of the time that is taken now i.e., 32 hours ÷ 2 = 16 hours.
2) If the numbers of workers are increased by 4 time i.e., 4 workers × 4 = 16 workers. It would take 1/4th of the time that is taken now i.e., 32 hours ÷ 4 = 8 hours.
The cost, in millions of dollars, for a company to manufacture x thousand speed boats is given by the function C(x) = 3x2 - 24x + 144. Find the number of speedboats that must be produced to minimize the cost. To minimize the cost, the company must produce thousand speedboats.
Answer:
For minimum cost the number of speedboats produced would be 4,000.
Step-by-step explanation:
That would be the value of x which minimises the cost C(x).
You can find this by converting the function to vertex form.
C(x) = 3x^2 - 24x + 144
= 3(x^2 - 8x) + 144
= 3[ (x - 4)^2 - 16] + 144
= 3(x - 4)^2 -48 + 144
= 3(x - 4)^2 + 96
For this to be a minimum x must be = 4.
That is 4,000 speedboats.
The actual minimum cost of producing theses is is 96 million dollars.
Answer:
4 thousand speedboats
Step-by-step explanation:
Vertex FormThe minimum/maximum point on a parabola is just another name for that parabola's vertex. A parabola can be defined in a few different ways, but one is as the curve described by a quadratic function, a function of the form [tex]y=ax^2+bx+c[/tex] where a, b, and c ≠ 0. To see how we can get a vertex out of this, we can start with the simpler function [tex]y=ax^2[/tex]. Here, the vertex is simply the origin, (0, 0). If we shift the graph horizontally by h units, replacing x with (x - h), we get the function [tex]y = a(x-h)^2[/tex] and the vertex (h, 0), and if we shift it vertically by k units, we get the equation [tex]y-k=a(x-h)^2[/tex] and the vertex (h, k). We can, of course, add k to either side to obtain the function [tex]y=a(x-h)^2+k[/tex], also known as the general vertex form of a quadratic function.
The Problem: Completing the SquareThis problem asks us to find a value for x which would minimize the C(x) in the function [tex]C(x)=3x^2-24x+144[/tex]. This essentially boils down to getting C(x) in vertex form and finding the x coordinate of the vertex from there. To do this, we can utilize an algebraic technique called completing the square to transform the expression on the right side into the form we want. Our task then is to somehow manipulate [tex]3x^2-24x+144[/tex] so that it resembles the form [tex]a(x-h)^2+k[/tex], where a, h, and k are constants, and (h, k) is the vertex of the parabola.
The first thing we can do with our expression is pull out a 3 from all three terms:
[tex]3x^2-24x+144\rightarrow3(x^2-8x+48)[/tex]
What we'd like now is to somehow turn that expression in the parentheses into something resembling [tex](x-h)^2[/tex]. To do this, we can recall that
[tex](x-y)^2=x^2-2xy+y^2[/tex].
If we rewrite [tex](x^2-8x+48)[/tex] as [tex](x^2-2\cdot4\cdot x+48)[/tex], we can see that this almost resembles [tex](x-4)^2=x^2-2\cdot4\cdot x+4^2=x^2-8x+16[/tex]. The only difference is between the 48 and the 16. To fix this, we can subtract 32 from the 48:
[tex]3(x^2-8x+48-32)[/tex]
However, to balance this subtraction out, we'll need to add 96 (which is 32 × 3) on to the end:
[tex]3(x^2-8x+16)+96[/tex]
Finally, we can rewrite our function C(x) as
[tex]C(x)=3(x-4)^2+96[/tex]
This gives us a vertex/minimum point of (4, 96), which means we need to produce 4 thousand speedboats to minimize its costs.
Divide. 24÷(−2) Drag and drop the correct number into the box to complete the sentence. The quotient is . −6 6 −12 12 −22 22
Answer: -12
Step-by-step explanation: 24 divided by -2 = -12
Answer:
-12
Step-by-step explanation:
Divide. 24÷(−2)
Dividing a positive number with a negative number results to a negative number.
24 is positive and 2 is negative.
24 ÷ 2 = 12
But since 2 is negative;
24 ÷ -2 = -12
24 ÷ (-2)
Which symbol correctly compares these fractions?
9
10 ___ 36
40
Answer:
Step-by-step explanation:
I am assuming this is meant to say 9/10 and 36/40.
If so 9/10=36/40.
Because 10 x 4 = 40
and 9 x 4 = 36.
Hope this helps! :)
What is the price of a banquet at Bella’s for 150 people
Answer:
4500
Step-by-step explanation:
you just need to see where the line stops at the price and drag your finger across to see how many people :}
Answer:
$4500
Step-by-step explanation:
Bellas line is the purple colored line. She wants a banquet for 150 people. That is along the x axis or across the bottom. Go up from 150 until you hit the purple line and then go left until you hit the y axis. That is the cost of a banquet for 150 people for Bella
Is 15% off better than 10% and $8 off on a purchase?
For a $100 purchase, 10% off plus $8 off results in a final price of $82, which is better than 15% off resulting in a final price of $85.
1. 15% off on a $100 purchase:
- Discount amount = 0.15 × 100 = 15
- Final price = 100 - 15 = 85
2. 10% off plus $8 off on a $100 purchase:
- 10% off discount amount = 0.10 × 100 = 10
- Price after 10% discount = 100 - 10 = 90
- Then apply $8 off: 90 - 8 = 82
So, for a $100 purchase:
- The final price with 15% off is $85.
- The final price with 10% off plus $8 off is $82.
Plz help on this problem stuckkk
Answer:
8 1/2
Step-by-step explanation:
Given:
m = 2 1/2 n = 4 1/4 m^2 + (n - 2)Looks like you already know what PEMDAS is.
Substitute the values of m and n into the underlined equation-- make sure you include parentheses around the numbers you substitute as this helps you easily see what you are doing.
(2 1/2)^2 + ((4 1/4) - 2)
Start inside the parentheses and subtract 2 from 4 1/4, then rewrite your equation.
(2 1/2)^2 + (2 1/4)
Next evaluate the exponent.
(6 1/4) + (2 1/4)
Since the fractions already have common denominators, you can add the whole numbers and the fractions together.
8 2/4
2/4 can be simplified by dividing both sides by 2/2.
8 1/2 is the final, fully simplified answer.
Aaron leaves one city at noon. He has to be at another city 186 km away at 3:00 P.M. The speed limit the entire way and 65 km/h. Can he arrive at the second city on time? Explain.
Answer:
If Aaron leaves one city at noon and has to be at another city at 3:00pm traveling at a rate of 65km/h, he will arrive to the second city on time.
Step-by-step explanation:
Aaron has three hours (from noon to 3:00pm) to travel a distance of 186km. If he travels at a speed of 65km per hour, then we can multiply 65 km times the number of hours he has available, three, to get a total of 195km. So, Aaron can travel up to 195 km in the three hour period and since the city is only 186km away, he has time to make it there before the 3:00pm deadline.
Answer:
Yes, he can.
Step-by-step explanation:
From noon to 3:00 pm, it's 3 hours.
If he drives on the speed limit with 65 km/h, andhas 186 kilometers to drive, he can make it on time.
3(65)=195 km.
195 is greater than 185, so he can make it on time.
Zohar is using scissors to cut a rectangle with a length of 5x-2 and a width of 3x+1 out of a larger piece if paper. The perimeter of the rectangle is 2(5x-2) + 2(3x+1). If x=4 centimeters, what is the total distance Zohar needs to cut with the scissors?
Answer:
62 cm
Step-by-step explanation:
P = 2(5x - 2) + 2(3x + 1) Insert the value of x
P = 2(5×4 - 2) + 2(3×4 + 1)
P = 2(20 - 2) + 2(12 + 1)
P = 2×18 + 2×13
P = 36 +26
P = 62 cm
Zohar must cut 62 cm with the scissors.
The volume of a sphere is 11, 488 cubic centimeters. What is the diameter of this sphere, to the nearest centimeter? (Volume of Sphere = 4/3πr3 ) Use pi = 3.14.
Answer:
Sphere Volume = (4/3) * PI * radius^3
Sphere Volume = (4/3) * PI * radius^3
11,488 = ((4/3) * 3.14) * radius^3
radius^3 = 11,488 / 4.1866666667
radius^3 = 2,743.9490445641
radius = 14 cm
diameter = 28 cm
Step-by-step explanation:
You invest $2,000.00 in a stock plan and another $2,000.00 in a savings account. The stock plan decreases by 7% the first year and gains 10% the second year. The savings account earns a 3.7% APR and compounds annually. What is the difference in earnings between the stock and savings account at the end of the second year?
Answer:
$104.738
Step-by-step explanation:
Let's work out the stock plan first:
$2,000 - 7% in the first year = $1,860
$1,860 + 10% = $2,046 in the second year
Savings account:
$2,000 + 3.7% = $2,074 in the first year
$2,074 + 3.7% = $2,150.738 in the second year
The difference:
$2,150.738 - $2,046 = $104.738
At the end of the second year, the savings account earns $104.74 more than the stock plan.
We are required to calculate the difference in earnings between a stock investment and a savings account after two years. To do this, we need to account for the changes in the stock plan's value and the compound interest from the savings account.
For the stock plan:
Year 1: $2,000.00 - (7% of $2,000.00) = $2,000.00 - $140.00 = $1,860.00
Year 2: $1,860.00 + (10% of $1,860.00) = $1,860.00 + $186.00 = $2,046.00
For the savings account:
Year 1: $2,000.00 + (3.7% of $2,000.00) = $2,000.00 + $74.00 = $2,074.00
Year 2: $2,074.00 + (3.7% of $2,074.00) = $2,074.00 + $76.74 = $2,150.74
The difference in earnings at the end of the second year is the amount in the savings account minus the amount in the stock plan:
$2,150.74 - $2,046.00 = $104.74.
if 3gallon containers of paint are on sale for 15.39, what is the price for 2gallon container
Answer:
the answer is 10.26
Step-by-step explanation:
If 3 gallons cost 15.39 you would have to divide 15.39 into 3. Once you find out how much one gallon costs (which is 5.13) you multiply it by 2.
The price for a 2-gallon container of paint would be $10.26, based on the provided price for 3-gallon containers.
Explanation:The subject of your question deals with cost and volume, which is a topic in mathematics, specifically ratios and unit rate. In this scenario, we are given that 3-gallon containers of paint are sold for $15.39. To find the price per gallon, we divide the total price by the number of gallons. This gives us a unit price of $15.39 / 3 = $5.13 per gallon.
If we want to find the price for a 2-gallon container, we would multiply this unit price by 2. So, the cost for a 2-gallon container would be $5.13 * 2 = $10.26.
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PLS HELP I REALLY NEED PLS PLS PLS HELP!!!!!!!!!!
Which data set COULD NOT be represented by the box plot shown?
A) {12, 7, 9, 8, 7, 10, 10, 10, 6}
B) {10, 9, 7, 8, 12, 7, 6, 10, 9}
C) {6, 10, 7, 9, 9, 7, 12, 8, 10}
D) {12, 7, 6, 8, 9, 9, 7, 11, 14}
Answer:
D) {12, 7, 6, 8, 9, 9, 7, 11, 14}
Step-by-step explanation:
The box plot for Set D (below) has
maximum = 14
3rd quartile = 11.5
IQR = 4.5
=====
Your box plot has
maximum = 12
3rd quartile = 10
IQR = 3
=====
Sets A, B, and C all fit your box plot.
Answer:
D) {12, 7, 6, 8, 9, 9, 7, 11, 14}
Step-by-step explanation:
Write the data in numerical order. Find the first quartile, the median, the third quartile, the minimum (smallest value) and the maximum (largest value).
{6, 7, 7, 8, 9, 9, 11, 12, 14}
Thus,
low -- 6
1st quartile -- 7
median -- 9
3rd quartile -- 11.5
high -- 14
Therefore, this data does not match the graph.
The basketball team needs to score at least 420 points this season to set a new school record. So far it has scored 82 points. Which inequality represents the number of points that need to be scored to set a record?
Answer:
The required inequality is [tex](x-82)\geq 420[/tex].
Step-by-step explanation:
Let the total number of points scored = x
It is given that the team has already scored 82 points.
So, the points left to score are (x-82).
As, the team needs to score at least 420 points.
The inequality representing the situation is given by,
Points to score ≥ 420
i.e. [tex](x-82)\geq 420[/tex].
Hence, the required inequality is [tex](x-82)\geq 420[/tex].
Answer:
420≤x -82
Step-by-step explanation:
We need to score at least 420 points.
420≤ x
where x is the score we need to set the record
We have 82 points so far
420≤x -82
We still need to score x-82 points this season
Band A charges $600 to play for the evening. Band B charges $350 plus $1.25 for each ticket sold.
-Write a linear equation for the cost of each band.
please help
Answer:
Band A:
Linear equation: y = 600
Band B:
Linear equation: y = 1.25x + 350
The cost will be equal at 200 tickets.
The cost when they are equal is $600.
use desmos copy and paste the graph
On the cardiac ward of a local hospital, there are 7 nursing assistants. The seven assistants have 7, 8, 5, 9, 10, 10, and 14 patients, respectively, that they assist. What is the average number of patients per nursing assistant?
Answer:
9
Step-by-step explanation:
average = [tex]\frac{sum of patients}{number of assistants}[/tex]
= [tex]\frac{7+8+5+9+10+10+14}{7}[/tex] = [tex]\frac{63}{7}[/tex] = 9
To get this answer you need to find the average. To find the average, you need to add the number of patients for each assistant together.
7 + 8 + 5 + 9 + 10 + 10 + 14 = 63
Then divide the answer by the number of assistants.
63 / 7 = 9
So, the answer is 9. There are an average of 9 patients per nurse.
Find the value of x and the value of y
It's an isosceles triangle 45° - 45° - 90°, therefore y = 5.
In that triangle, sides are in proportion 1 : 1 : √2.
Therefore we have x = 5√2.
Answer: B. x = 5√2, y = 5Other method.
You can use the Pythagorean theorem:
x² = 5² + 5²
x² = 25 + 25
x² = 2 · 25
x = √(25 · 2)
x = √25 · √2
x = 5√2
Answer: B. x = 5√2, y = 5Answer: Hello there!
You can see that this is a triangle rectangle, where one of the catheti is equal to 5, and we know all the angles (you can see that both lower angles are equal to 45°, then is safe to assume that both catheti are equal in length, but let's do the math):
we need to find the length of the other cathetus and the length of the hypotenuse.
A very useful thing to remember when you are working with a triangle rectangle is:
So-Ca -Toa
this means:
sin(a) = (opposite cathetus)/(hipotenuse)
cos(a) = (adjacent cathetus)/(hipotenuse)
tan(a) = (opposite cathetus)/(adjacent cathetus)
now, we can find y using the third relation:
tan(45°) = 5/x
y= 5/tan(45°) = 5
because tan(45°) = 1
and this has a lot of sence, because you can see that both cathetus are symetric.
Now we can find the value of x with the next Pythagorean theorem:
the square hypotenuse is equal to the sum of the squares of the cathetus:
x^2 = 5^2 + 5^2 = 2*(5^2)
x= (√2)*5
then the right answer is option B:
x = (√2)*5 and y = 5
What is the value of y in the following equation?
2y+16=4y+8?
Answer:
4 = y
Step-by-step explanation:
2y+16=4y+8
The first step is to subtract 2y from each side.
2y-2y+16=4y-2y+8
16 = 2y+8
Now subtract 8 from each side
16-8 = 2y+8-8
8 = 2y
Now divide each side by 2
8/2 = 2y/2
4 = y
If 5 + x = 12, and you add -5 to the left side of equation, what should you add to right side of equation?
Answer:
-5
Step-by-step explanation:
What you do to one side of the equation, you do to the other side of the equations.
If you add -5 to the left side of the equation, you add -5 to the right side of the equation.
5 + x = 12
-5 +5 + x = 12-5
x = 7
Answer:
5+x=12-5
x=2
Step-by-step explanation:
Add 5 to both sides of the equation
The equation becomes 10+x=12
Then subtract 10 from both sides of the equation
The equation becomes x=2
And now that x is by itself, you've gotten your answer
What equation goes through the point (-6,8) and is parallel to y=3x-7?
Answer:
y=3x+26
Step-by-step explanation:
Make sure they have the same slope.
At the baseball stadium, the price for popcorn is $5.88 for 3 bags. If you want to buy 7 bags of popcorn, how much will it cost?
Answer:
$13.72
Step-by-step explanation:
To get the answer, we need to find out how much one bag costs. We can divide 5.88 by 3 and get 1.96. One bag is $1.96. To find out how much seven bags cost, we can multiply 1.96 x 7 to get 13.72. It costs $13.72 for 7 bags of popcorn.
what is the value 3 x^2 5 x when x = 3
3*x*x*5*x
If x=3 then:
3*3*3*5*3
=27*15
= 405
Hope this helps! <3
Answer:
120
Step-by-step explanation:
Identify the type of function represented by f(x)=3/8(4)^x
Answer:
exponential growth
Step-by-step explanation:
The function type is identified by where the variables are, and what their exponents are.
Variable in the exponentWhen the variable is in the exponent of an expression, the function is called an exponential function.
BaseWhen the base of an exponential function has a magnitude greater than 1, the function is a growth function. When it is less than 1, the function is a decay function.
Here, the base is 4, which is greater than 1.
The function is an exponential growth function.
What is m-a = n+p, for a
Answer:
A=m-n-p
Step-by-step explanation:
So solve for a, we have to isolate it on one side, so -a=n+p-m. So a=m-n-p
Answer:
a = m - n - p
Step-by-step explanation:
isolate the term in a by subtracting m from both sides
- a = n + p - m ( multiply through by - 1 )
a = - n - p + m = m - n - p
7×60 is it <,> or = 400
Answer:
>
Step-by-step explanation:
7 x 60 = 420
So...
420 > 400
(420 is greater than 400)
Answer:
420>400
Step-by-step explanation:
7×60 is it <,> or = 400
First we multiply the left side
7*6 = 42 so
7*60 = 420
420>400
factor 16bc+8am completely
Find the GCF (Greatest Common Factor)
GCF = 8
Factor out the GCF (Write the GCF first and then in parentheses, divide each term by the GCF)
8(16bc/8 + 8am/8)
Simplify each term in parentheses
8(2bc + am)
Answer:
8(2bc + am)
Step-by-step explanation:
Factor out common factors from both terms. Note that each variable (the letters) are different, but that the numbers have factors.
Factors of:
16: 1, 2, 4, 8, 16
8: 1, 2, 4, 8
Note that the greatest factor is 8 in both numbers. Divide 8 from both terms
(16bc + 8am)/8 = 2bc + am
Add the factor to the front and parenthesis the leftover factors.
8(2bc + am) is your new answer.
~
What is the product
Answer:
15377.34375
Step-by-step explanation:
10800*((224+1)/2)/100*((224+1)/2)/100*((224+1)/2)/100
=108 * (225/2) * ( 225/200)*(225/200)
=15377.34375