Answer:
Step-by-step explanation:
Let x represent Jane's age
Let y reprsent her brother's age
x=3y-5
x=11-y
subtract
0=4y-16
-4y=-16
y=4
plug back into equation
x=3y-5
x=3(4)-5
x=7
If ∠3 = 5x - 1, and ∠5 = 3x + 11, then x =
Answer:
6
Step-by-step explanation:
cause we will add them together
5x -1 = 3x +11
2x=12
x=6
The value of x if ∠3 = 5x - 1, and ∠5 = 3x + 11, is 6.
What is angle?An angle is a figure in Euclidean geometry made up of two rays that share a common terminal and are referred to as the angle's sides and vertices, respectively.
Angles created by two rays are in the plane where the rays are located. The meeting of two planes also creates angles.
Given;
∠3 = 5x - 1, and ∠5 = 3x + 11,
Calculate the value of x as shown below,
∠3 = ∠5 (Alternate interior angles between parallel lines are equal)
5x - 1 = 3x + 11
5x - 3x = 11 + 1
2x = 12
x = 12 / 2
x = 6
Thus, the value of x is 6.
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15 over 1000 wrote in scientific notation
Answer:
1.5*10^-2
Step-by-step explanation:
You mean 15/1000 written in scientific notation?
In this case, it would be- 1.5*10^-2.
Which of the following is a continuous random variable?
a. The number of employees in an office
B. The salaries of employees in an office
C. The numbers of printers in an office
D. The number of phone calls made daily from an office.
Answer:
B: The salaries
Step-by-step explanation:
B: The salaries. While not strictly continuous, the range of salaries is closest of these four choices to being continuous. In contract, "number of employees," "number of printers," and "number of phone calls" are all discrete random variables.
The statement at D "The number of phone calls made daily from an office" is a continuous random variable.
What is meant by a continuous random variable?A random variable is defined for all the values in an interval or between two values.
Verifying the given statements:A. The number of employees in an office.
It is a constant value. It's not a continuous random variable.
B. The salaries of employees in an office
It is a constant value. It has only one value means represented in a closed interval. So, not a continuous random variable
C. The number of printers in an office
This is also a constant value. So, not a continuous random variable
D. The number of phone calls made daily from an office
The number of phone calls made daily, may not be the same and are continuous. If the interval of a month, there may be a different number of phone calls. So, it is a continuous random variable.
So, option D is correct.
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If f(x) and its inverse function, f–1(x), are both plotted on the same coordinate plane, what is their point of intersection?
Answer:
-3
Step-by-step explanation:
f(-1) = 3(-1)
f(-1) = -3
Answer with explanation:
The given function is:
⇒ y =3 x
And it's inverse function can be Calculated by, replacing , x by y, and , y by x, in the above equation
⇒x=3 y, is the equation of inverse function.
Both the original function , and inverse function passes through origin, As well as Origin is the point of Intersection, which can be shown as follows:
3 x-y=0-----(1)
x-3 y=0
3 x - 9 y =0 ------(2)
EQ.(1) - Eq.(2)
3 x - y - (3 x- 9 y)=0
-y + 9 y=0
8 y=0
y=0
Putting the value of , y in equation (2)
x=3 × 0
x=0
⇒Point of intersection of ,f(x) and it's inverse =(0,0)
what is the area of a hexagon with an apothem of 10
Since the perimeter of said hexagon is 120√3, we simply multiply this number by 10 and divide it by 2.
1200√3/2 = 600√3
a man can do a job in 4 days working alone and his helper can do the same job in 12 days working alone what part of the job can they do in one day when working together at their respective rates?
Solution:
Let t = working together in terms of days
(1/4) + (1/12) = 1/t
Solve for t.
Multiply both sides by the LCD.
LCD = 12t
3t + t = 12
4t = 12
t = 12/4
t = 3
Together, they can do the job in 3 days.
The number 18.34 has four significant figures
Answer:
True
Step-by-step explanation:
The number 18.34 has four significant figures. Yes it is true that it has four significant figures.
For significant figures, we start counting from the first non zero digit.
The first non zero digit in 18.34 is 1.
Count from this number to the last number, we have four numbers.
Therefore, it is true that the number 18.34 has four significant figures.
What is the estimate for the probability of selecting a red crayon OR a yellow crayon from the bag?
Answer: It would be both because there is no number to it
Step-by-step explanation:
For example if there were 15 red crayons and 10 yellow ones it would be the red crayons because there is a bigger amount of them in the bag but because there is no number you have the same possibility of picking both.
To estimate the probability of selecting a red crayon OR a yellow crayon from the bag, calculate the individual probabilities of each color and use the OR probability formula to find the estimate.
Estimate for the probability of selecting a red crayon OR a yellow crayon from the bag:
Calculate the individual probabilities of selecting a red crayon and a yellow crayon.Use the formula P(A OR B) = P(A) + P(B) - P(A AND B) to find the estimate for the probability of selecting a red crayon OR a yellow crayon.Substitute the individual probabilities into the formula to get the final estimated probability.Plzzzz help
1) Given f(x)=x+4 and g(x)=12x-6, what is f(3)+g(-1)?
A.) 22
B.) 33
C.) -11
D.) 11
2) what is f(x).g(x) if f(x)= 2x+3 and g(x)=4x?
A) 6x+3
B) 6x^2+12
C) 8x^2+12
D) 8x+3
3) f(x)=2x-3 and g(x)=4x what is f(2)-g(3)
A) 15
B) -11
C) -15
D) -5
Answer:
1) C.) -112) C.) 8x² + 12x3) B) -11Step-by-step explanation:
1)
f(x) = x + 4
f(3) = 3 + 4 = 7
g(x) = 12x - 6
g(-1) = 12(-1) - 6 = -12 - 6 = -18
f(3) + g(-1) = 7 + (-18) = -11
2)
f(x) = 2x + 3, g(x) = 4x
f(x) · g(x) = (2x + 3)(4x) use the distributive property
f(x) · g(x) = (2x)(4x) + (3)(4x)
f(x) · g(x) = 8x² + 12x
3)
f(x) = 2x - 3
f(2) = 2(2) - 3 = 4 - 3 = 1
g(x) = 4x
g(3) = 4(3) = 12
f(2) - g(3) = 1 - 12 = -11
1) Given f(x)=x+4 and g(x)=12x-6, what is f(3)+g(-1)?
C) -11
2) what is f(x).g(x) if f(x)= 2x+3 and g(x)=4x?
C) 8x^2+12
3) f(x)=2x-3 and g(x)=4x what is f(2)-g(3)
B) -11
what is the mean between the numbers 3,19,21,6.8,9.3,21.7,2.9
Answer:
About 11.96
Step-by-step explanation:
The mean of a data set is basically the average.
To find the average, add up all of the data values and then divide by the amount of numbers there are.
First, add the numbers.
3 + 19 + 21 + 6.8 + 9.3 + 21.7 + 2.9 = 83.7
There are 7 numbers in this data set so divide 83.7 by 7
83.7/7 = 11.95714285714286
Round this number to the nearest hundreth, to get 11.96
So, the mean of this data set is 11.96
I hope this helps!
Will bought a package of 24 juice bottles for $7.44. Which equation relates the cost , c of a package of juice bottles to the number of bottles, b, in the package?
7.44÷24=c because to find the unit price you need divide 7.44 by 24
Answer:
c=0.31b
Step-by-step explanation:
$7.44 divided by 24 = 0.31
Calculate the finance charge and new balance using the previous balance method. Previous balance = $199.19 Annual rate = 14%
Answer:
Finance charge = $2.32
new balance = $201.51
Step-by-step explanation:
Finance charge = Previous balance×Periodic percentage rate
The previous balance is 199.19
The annual percentage rate is 0.14. Therefore, the periodic percentage rate is; (0.14/12)
Finance charge = 199.19 * (0.14/12)
= 2.3239 = $2.32
new balance = previous balance + finance charge
= 199.19 + 2.32
= $201.51
what is the gcf of 18 and 54
Answer:
18 is the GCF
Step-by-step explanation:
Factors of 18: 1, 2, 3, 6, 9, 18
Factors of 54: 1, 2, 3, 6, 9, 18, 27, 54
Answer is provided in the image attached.
What is the surface area of the figure shown?
484.8 square inches
500.8 square inches
452.8 square inches
404.8 square inches
Answer:
The surface area is [tex]404.8\ in^{2}[/tex]
Step-by-step explanation:
we know that
The surface area of the figure is equal to
[tex]SA=2B+PL[/tex]
where
B is the area of the trapezoidal face
P is the perimeter of the trapezoidal face
L is the length of the figure
Find the area of B
[tex]B=\frac{1}{2}(15+5)8\\ \\B=80\ in^{2}[/tex]
Find the perimeter P
[tex]P=(8+5+12.8+15)=40.8\ in[/tex]
we have
[tex]L=6\ in[/tex]
substitute the values
[tex]SA=2(80)+(40.8)(6)=404.8\ in^{2}[/tex]
which equation is equivalent to the equation 5x-7y=-70
A.y=-7/5x-14
B.y=7/5x+14
C.y=5/7x-10
D.y=5/7x+10
Answer:
[tex]\large\boxed{D.\ y=\dfrac{5}{7}x+10}[/tex]
Step-by-step explanation:
[tex]Ax+By=C\qquad\text{it's a standard form of an equation of a line}\\\\\\y=mx+b\qquad\text{it's a slope-intercept form of an equation of a line}\\\\\text{We have the equation in the standard form:}\\\\5x-7y=-70\\\\\text{Convert it to the slope - intercept form:}\\\\5x-7y=-70\qquad\text{subtract 5x from both sides}\\\\-7y=-5x-70\qquad\text{divide both sides by (-7)}\\\\y=\dfrac{5}{7}x+10[/tex]
Please explain your answer as well. THX!!!
Answer:
Third Option
[tex]P(x\geq 9) =0.212[/tex]
Step-by-step explanation:
Note that the variable x is a discrete random variable that can be modeled using a binomial distribution. For a discrete random variable the probability that x is greater than a number b is:
[tex]P(x\geq b) =\sum_{x=1}^{b}{P(x)} = P(1) + P(2) + P(3) + ... + P(b)[/tex]
In this case we look for the probability of selecting 9 or more girls
This is:
[tex]P(x\geq 9) =\sum_{x=9}^{14}{P(x)} = P(9) + P(10) + P(11) +P(12)+ P(13) + P(14)[/tex]
Looking in the attached table we have to
[tex]P(x\geq 9) =0.122 + 0.061 + 0.022 + 0.006+ 0.001 + 0[/tex]
[tex]P(x\geq 9) =0.212[/tex]
You and your mom enter a drawing with three different prizes. A total of eight people entered the drawing and prizes are awarded randomly.
There are 336 ways to award the prizes.
What is the probability that you win first prize and your mom won second prize?
Answer: C. [tex]\dfrac{6}{336}[/tex]
Step-by-step explanation:
Given: The number of different prizes = 3
The number of people entered the drawing = 8
The total number of ways to award the prizes. = 336
Now, The number of ways to select for 3 prizes, such that you win first prize and your mom wins second prize is given by :-
[tex]1\times1\times(8-2)=6[/tex]
Hence, the probability that you win first prize and your mom wins second prize=[tex]\dfrac{6}{336}[/tex]
Pre Cal | Multiple Choice | Apex
Which conic section does the equation below describe?
( x-9 )^2/4 + ( y+2 )^2/25=1
A. Circle
B. Ellipse
C. Hyperbola
D. Parabola
Ellipse is your answer, because if you plug the equation into a graphing calculator and identify the conic, the term ellipse is given-
how to find the average rate of change of a function
ANSWER
Average Rate of Change
[tex] = \frac{f(b) - f(a)}{b - a} [/tex]
EXPLANATION
To find the average rate of change of y=f(x) from x=a to x=b means finding the slope of the secant line joining the points
(a,f(a)) and (b,f(b))
The slope of the secant line joining these points is
[tex] = \frac{f(b) - f(a)}{b - a} [/tex]
This gives the average rate of change of the function.
To find the average rate of change of a function, you need to subtract the function values at two different points and divide by the difference in the input values.
Explanation:To find the average rate of change of a function, you need to calculate the change in the function's output divided by the change in its input. This can be done by subtracting the function values at two different points and dividing by the difference in the input values. For example, if you have a function f(x) and want to find the average rate of change between x = a and x = b, you would use the formula:
Average Rate of Change = (f(b) - f(a)) / (b - a)
This will give you the average rate at which the function is changing over the interval from a to b.
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Department A had sales of $200,000.00, Department B had sales of $600,000.00, and total overhead expenses were $32,000.00. The allocation of overhead to Department A should be ________.
Answer:
the allocation of overhead to department A is $8,000.00
Step-by-step explanation:
Given that Department A had sales of $200,000.00 and Department B had sales of $600,000.00, the ratio of department A's sales to that of department B is 200,000.00 / 600,000.00 = 1/3.
The total overhead expenses were $32,000.00, the allocation of overhead to department A is 32,000.00 / (3 + 1) = $32,000.00 / 4 = $8,000.00
suppose a fair coin is tossed and a six-sided number cube is rolled. what is the probability that the coin lands on tails in the outcome on the number cube is a number less than 3? A.) 1/6 B.) 1/12 C.) 1/9 D.) 1/3
Hey
Since a coin has 1/2 chances on both sides and a six-sided cube has 1/3 chance of getting a less than three, multiply those chances and you will get the probability of 1 / 6
So the answer is option A, [tex]\frac{1}{6}[/tex]
The probability that the coin lands on tails in the outcome on the number cube is a number less than 3 is 1/6.
What is the probability that the coin lands on tails in the outcome on the number cube is a number less than 3?Given:
Suppose a fair coin is tossedAnd a six-sided number cube is rolled.Find:
The probability that the coin lands on tails in the outcome on the number cube is a number less than 3.Solution:
A coin is tossed and a six-sided cube is rolled.
We have to find the probability of getting a tail on the coin and a number less than 3 in the cube.
The probability of getting a tail in the coin is 1/2.
The probability of getting a number less than 3 is 2/6 = 1/3.
Probability of getting a tail on the coin and a number less than 3 on a cube is 1/2*1/3 = 1/6.
Hence, The probability that the coin lands on tails in the outcome on the number cube is a number less than 3 is 1/6.
Therefore, Option A is the correct answer.
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identify the correct trigonometry formula to use to solve for x.
Answer:
sin(62)=18/x
Step-by-step explanation: sine = opp/hyp
Answer: Third option.
Step-by-step explanation:
Given the right triangle in the figure attached, you know that, for the known angle of 62 degrees, the lenght of the opposite side is 18 and the hypotenuse is "x"
Therefore, you need to remember the following identity:
[tex]sin\alpha=\frac{opposite}{hypotenuse}[/tex]
Then, having that:
[tex]\alpha=62\°\\opposite=18\\hypotenuse=x[/tex]
You need to substitute these values into [tex]sin\alpha=\frac{opposite}{hypotenuse}[/tex], then you get that the correct trigonometry formula to use to solve for "x" is:
[tex]sin(62\°)=\frac{18}{x}[/tex]
Which of the following statements is true?
Answer:
D
Step-by-step explanation:
If x° and y° are complementary angles, then x°+y°=90° and
[tex]\sin x^{\circ}=\cos y^{\circ} \ [\text{Cofunctions rule}][/tex]
Check all options:
A. 18°+72°=90°, so
[tex]\sin 18^{\circ}=\cos 72^{\circ}\ [\text{true}][/tex]
B. 55°+55°=110°, these angles are not complementary and
[tex]\sin 55^{\circ}\neq\cos 55^{\circ}\ [\text{false}][/tex]
C. 72°+18°=90°, so
[tex]\sin 72^{\circ}=\cos 18^{\circ}\ [\text{true}][/tex]
D. Both A and C are true.
helppppp due toarrow very easy simple
132+396=528 is 100%
132 is ?%
?=132x100/528=25%
Answer is 25% ate CFA
Answer:
25%
Step-by-step explanation:
Although the problem statement doesn't say so, you have to find the total number of people who bought hamburgers. It's 132 + 396, or 528.
132 people out of a total of 528 people ate at Chick-a-Fil. This comes to
132
------- = 0.25, or 25%
528
You must write out your conclusion: "25% of these people ate at Chick-a-Fil.
If x = 6 cm, what is the surface area of the geometric shape formed by this net?
A. 144 square cm.
B. 432 square cm.
C. 216 square cm
D. 576 square cm
Please explain because these still stump me
Answer:
the answer is D. 576 square cm
Step-by-step explanation:
Find the area of one of the rectangular faces using the formula, Area = lw.
A = (12 cm) (6 cm)
A = 72 square cm
Since there are 4 rectangular faces, multiply the area of one rectangular face by 4 to get a total of 288 square cm.
The area of one of the congruent squares is 12 cm × 12 cm, or 144 cm2. Multiply 144 cm2 by 2 to get a total of 288 cm2.
To find the surface area of the rectangular prism, add the area of the four rectangular faces to the area of the two square faces.
288 square cm + 288 square cm = 576 square cm
What is the slope of the line through the points (-2,-1) and (8,-3)?
Answer:
- 1/5
Step-by-step explanation:
Slope of a line passing through two points can be calculated as:
[tex]\text{slope}=\frac{\text{rise}}{\text{run}} \\\\ \text{slope}=\frac{\text{Difference of y coordinates}}{\text{Difference of x coordinates}}[/tex]
The given points are (-2, -1) and (8, -3). Using the values in above formula, we get:
[tex]\text{slope}=\frac{-3-(-1)}{8-(-2)}\\\\ \text{slope}=\frac{-3+1}{8+2}\\\\ \text{slope}=\frac{-2}{10}\\\\ \text{slope}=\frac{-1}{5}[/tex]
Thus the slope of the line through the given points is -1/5. So 2nd option gives the correct answer
Answer:
The correct answer is second option
-1/5
Step-by-step explanation:
Points to remember
The slope of line passing through (x₁, y₁) and (x₂, y₂) is given by,
Slope = (y₂ - y₁)/(x₂ - x₁)
To find the slope of given line
Here, (x₁, y₁) = (-2, -1) and (x₂, y₂) = (8, -3)
Slope = (y₂ - y₁)/(x₂ - x₁) = ( -3 - - 1)/(8 - -2)
= (-3 + 1)/(8 + 2) = -2/10
= -1/5
Therefore the correct answer is second option -1/5
How do you Graph y-3=1/3(x+1)
Answer:
You can find the point of intersection of the line with the y-axis and the the point of intersection of the line with the x-axis. See the graph attached.
Step-by-step explanation:
Find the intersection with the y-axis. Substitute [tex]x=0[/tex] into the equation and solve for y:
[tex]y-3=\frac{1}{3}(x+1)\\\\y-3=\frac{1}{3}(0+1)\\\\y-3=\frac{1}{3}(1)\\y=\frac{1}{3}+3\\\\y=\frac{10}{3}[/tex]
[tex]y[/tex]≈3.33
Find the intersection with the x-axis. Substitute [tex]y=0[/tex] into the equation and solve for x:
[tex]y-3=\frac{1}{3}(x+1)[/tex]
[tex]0-3=\frac{1}{3}(x+1)\\(-3)(3)=x+1\\-9-1=x\\x=-10[/tex]
Now, you know that the line passes through the point (0,3.33) and (-10,0). Now you can graph the function. (Observe the graph attached)
What number should be added to both sides of the equation to complete the square? X^2-6xx=5
Answer:
9
Step-by-step explanation:
To complete the square, divide the coefficient of the b term 6x in two. This becomes -6/2=-3. Now square the number -3 and it becomes 9. To complete the square add 9 to both sides.
Answer:
9
Step-by-step explanation:
[tex]x^2-6x = 5\\[/tex]
We know the binomial formula: [tex](a-b)^2 = a^2 -2ab + b^2[/tex]
Let's consider 6x = 2ab, we know a is our first term - x;
6x = 2axb
6 = 2b
b = 3
So to make a perfect square, we need to add [tex]b^2[/tex] to both sides
[tex]x^2 - 6x + 3^2 = 5 + 3^2\\x^2 - 6x + 9 = 5 + 9\\(x-3)^2 = 14[/tex]
Which of the following payments is the same amout each time it is paid? A) Property Taxes B) PMI C) Interest D) Principal
The payment that is the same amount each time that it is paid is given as follows:
B) PMI.
What is the monthly payment formula?The monthly payment formula is defined as follows:
[tex]PMI = P\frac{\frac{r}{12}\left(1 + \frac{r}{12}\right)^n}{\left(1 + \frac{r}{12}\right)^n - 1}[/tex]
In which the parameters are listed and defined as follows:
P is the initial amount, also known as the principal.r is the interest rate.n is the number of payments.The monthly payment is calculated before a purchase is made, meaning that it assumes the same amount each time it is paid, and thus option B is the correct option in this problem.
The principal is a one time payment, while taxes and interest vary over time.
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In a thirty-year fixed-rate mortgage, the principal portion of the payment is the same amount each time it is paid, while the interest decreases over time, thus maintaining a consistent total payment amount.
Explanation:The student is asking which of the following payments is the same amount each time it is paid: Property Taxes, PMI (Private Mortgage Insurance), Interest, or Principal. The answer is Principal in the context of a thirty-year fixed-rate mortgage.
This type of mortgage has a consistent monthly payment that includes both the principal and the interest. Early in the loan, the payment consists of more interest than principal, but as the loan matures, the portion of the payment that goes towards the principal increases while the interest portion decreases.
This ensures that the total payment amount remains the same throughout the life of the loan.
Example of Principal Payment Over Time
If you have a thirty-year fixed-rate mortgage, your monthly payment is calculated at the outset to ensure that each payment is the same, even though the principal paid increases over time as the outstanding balance of the loan decreases.
PLS HELP ME I WILL GIVE BRAINLIEST
Answer:
78°
Step-by-step explanation:
The angular distance of an arc is twice the angle that forms it if that angle lies of the edge of the circle.
By this, Arc AK has angular distance 158°.
Arc JL = 202°.
Arc KL = 122°.
By subtracting these we get 80° for Arc JK.
Arc KA = 158°.
Arc AJ = KA - JK
AJ = 158-80
AJ = 78°