In a class of 12 boys and 8 girls, two students need to be chosen for classroom jobs.
What is the probability that Mary gets selected?

Answers

Answer 1

Answer:

55 percent chance or 11/20 or  0.55

Step-by-step explanation


Related Questions

What is the slope of a line that passes through the following points (4, 6) and (2, 0)?

Answers

Answer:

3

Step-by-step explanation:

Step-by-step explanation:

formula to fine slope

m=tan()=y2-y1/x2-x1

0.25 of 40 plz plz help

Answers

Percentage Calculator: What is 0.25 percent of 40? = 0.1.

I CAN GIVE BRAINLIEST!!!!!!

Answers

Answer: 2/1

Step-by-step explanation:

Answer:

2

Step-by-step explanation:

Line is passing through the points (2, 3) & (5, 9)

Slope = (9 - 3)/ (5 - 2) = 6/3 = 2

Slope of the line is 2.

the answer below thanks

Answers

Answer:

The equation of the circle having centre (-5,-9) and radius r=3  is

x² + 10 x +y² + 14 y + 65 = 0

Step-by-step explanation:

Explanation:-

From graph  The centre of the circle  C( -5 , -7)

The radius of the circle r = 3cm from the centre of the given circle

The equation of the circle



From graph the centre ( h, k) = ( -5,-7) and r = 3cm

                 [tex](x-(-5))^2+(y-(-7))^2 = 3^2[/tex]

                x² + 10 x +25 +y² + 14 y + 49 =9

              x² + 10 x +25 +y² + 14 y + 49 -9=0

 The equation of the circle

                x² + 10 x  +y² + 14 y + 65 = 0  

 



                     

Genna purchased a pair of shoes on a web site.The original price of the shoes was $120. She used the coupon code to receive a 20% discount. The web applied a 15% service fee to the discounted price. Genna's shoes were less than the original price by what percent

Answers

Answer:

use calculater

Step-by-step explanation:

A dozen is how much in maths?

Answers

A dozen is 12 in maths..

Answer:

well for me it's

Step-by-step explanation:

12

But a german dozen is 13

please give me brainlest

True or false
do all states have an income tax?

Answers

Answer:

All states have a state income tax. The amount of tax withheld generally depends on the level of income and the number of exemptions claimed.

this answer would be true

In the accompanying diagram of ABC, AB = 6, BC = 8, and AC = 12. Points X, Y, and Z are midpoints of AB, BC, and AC, respectively. Find the perimeter of quadrilateral XYCZ.​

Answers

Answer:

cb

Step-by-step explanation:

What is the y-value of the solution of the system of equations given below?
3x + 2y = -6
y = 2x + 4

Answers

Point form: (-2, 0)
Equation form: x=2, y=0

If a number is doubled the result is sixty

Answers

Answer:

30

Step-by-step explanation:

30x2=60

help meeeeeeeeeeeeeeeeeee

Answers

Answer:

18

Step-by-step explanation:

the other right triangle is 3-4-5. so, 3*4/2=6

4*6/2=12

6+12=18

give brainliest pls

The answer should be 18

This extreme value problem has a solution with both a maximum value and a minimum value. Use Lagrange multipliers to find the extreme values of the function subject to the given constraint.
f(x, y) = xy; 4x2 + y2 = 8

Answers

Answer: minimum value of f = -2  and maximum value  of f = 2

Step-by-step explanation:

Given that;

f(x, y) = xy; 4x² + y² = 8

S(x,y) = xy + λ(4x² + y² - 8)

dS/dλ = 4x² + y² - 8 = 0

dS/dx = y + 8λx = 0 -> y = -8λx  

dS/dy = x + 2yλ = 0 -> x + 2λ(-8λx) = x(1 - 16λ²) = x(1-4λ)(1+4λ) = 0

-> x = 0 , λ = 1/4 , λ = -1/4

x = 0 -> y = 0 -> it doesn't satisfy 4x² + y² = 8

λ = 1/4 -> y = -8λx = -2x -> 4x² + y² = 8x² = 8 -> x = -1 , 1 -> y = 2 , -2

λ = -1/4 -> y = -8λx = 2x -> 4x² + y² = 8x² = 8 -> x = -1 , 1 -> y = -2 , 2

we have 4 critical points:

(-1, 2) -> f = -2

(1, 2) -> f = 2

(-1, -2) -> f = 2

(1 , -2) -> f = -2  

Therefore; minimum value of f = -2  and maximum value  of f = 2

lb = 64 oz Helppppppppppppp me
[tex]5[/tex]

Answers

Answer:

no u

Step-by-step explanation: no no no no no no no no no

Sophia had 63¢ until she spent 5 nickels. How much money does Sophia have now?

Answers

Answer:

38 cents

Step-by-step explanation:

5x5=25

63-25=38

x + 5y = 8
3x = 24 - 157

Answers

Answer:

x = [tex]-\frac{133}{3}[/tex], y = [tex]\frac{157}{15}[/tex]

Step-by-step explanation:

x + 5y = 8

3x = 24 - 157

3x = 24 - 157

3x = -133

x = [tex]-\frac{133}{3}[/tex]

x + 5y = 8

[tex]-\frac{133}{3}[/tex] + 5y = 8

5y = [tex]\frac{157}{3}[/tex]

y = [tex]\frac{157}{15}[/tex]

A person invests 4000 dollars in a bank. The bank pays 6.25% interest compounded
annually. To the nearest tenth of a year, how long must the person leave the money
in the bank until it reaches 9600 dollars?

Answers

Answer:

14.4

Step-by-step explanation:

Given that :

Principal = 4000

Interest (r) = 6.25% compounded annually

Calculate time, t, if final amount A = 9600

Using the compound interest formula :

A = P(1 + r/n)^n*t

A = final amount

n = number of times interest is applied per period

9600 = 4000(1 + 0.0625)^t

9600 = 4000(1.0625)^t

9600/4000 = 1.0625^t

2.4 = 1.0625^t

Take the log of both sides

0.3802112 = 0.0263289t

t = 0.3802112/0.0263289

t = 14.440811

t = 14.4 ( nearest tenth)

Solve the equation.
k/-9 =7

Answers

Answer:

k=-63

Step-by-step explanation:

multiply both sides by -9

k=7*-9

k=-63

Answer:

-63

Step-by-step explanation:

by simplifying both sides of the equation, then isolating the variable.  k= -63

-9 x 7 = -63

CO
Mandy has an annual salary of $37,580. Each month she has a car payment of $265 and a student loan of $120. If
she applies for a home loan, how likely is it Mandy will be approved based on her debt-to-income ratio?
a. Very likely, recurring debt is less than what is allowed.
b. Somewhat likely, recurring debt is equal to what is allowed.
C. Not likely, recurring debt is higher than what is allowed.
d. There is not enough information given to determine the answer.

Answers

C. Not likely, recurring debt is higher than what is allowed.

edge 2021

Mandy's approval based on her debt - to - income ratio is;

C: Not likely, recurring debt is higher than what is allowed.

What is Debt to income ratio?

Debt to income ratio is simply the percentage of your gross monthly income that goes to paying your monthly debt payments.

Now, her annual salary is $37,580. This means that her monthly income is; 37580/12 = $3131.67

Her monthly debt servicing = $265 + $120 =$385

Using the 28/36 ratio, the maximum allowable recurring debt for someone with a monthly income of $3,200 is $256.

Since her recurring monthly debt is $385 it is more than the maximum recurrent limit and so her home loan will not be approved.

Read more about debt - to - income ratio at; https://brainly.com/question/24814852

HELP IM IN CLASS DOING IT RIGHT NOW The absolute value of any number is always positive. True False

Answers

Answer:

True

Step-by-step explanation:

Answer:

[tex] \huge\purple{TRUE}[/tex]

Step-by-step explanation:

The absolute value of any number is always positive.

A regression model to predict Y, the state-by-state 2005 burglary crime rate per 100,000 people, used the following four state predictors: X1 5 median age in 2005, X2 5 number of 2005 bank- ruptcies per 1,000 people, X3 5 2004 federal expenditures per capita, and X4 5 2005 high school graduation percentage. (a) Write the fitted regression equation. (b) Interpret each coef- ficient. (c) Would the intercept seem to have meaning in this regression

Answers

Answer:

hello your question is incomplete attached below is the complete question

Answer :

a) attached below

b) Agemed ; 2005 median age of population

Fedspend ; 2004 federal spending per capita for all functions

HSGrad% ; 2005 public high school graduation rate

Bankrupt ; 2005 corporate or individual bankruptcies filed per 1,000 population

c) No

Step-by-step explanation:

A) Fitted regression equation

attached below is the excel procedure and the answer related to the question

b) Interpret each coefficient

Agemed ; 2005 median age of population

Fedspend ; 2004 federal spending per capita for all functions

HSGrad% ; 2005 public high school graduation rate

Bankrupt ; 2005 corporate or individual bankruptcies filed per 1,000 population

C) would the intercept seem to have meaning in this regression

The intercept wouldn't have a meaning in this regression

Please help, I really need help, will mark brainliest

Answers

ANSWER

have it right it is -4

Find the distance between the two points in simplest radical form.
(-2,-1) and (-8,7)

Answers

Answer:

The distance in radical form is √100 (which is equal to 10units

Step-by-step explanation:

Distance=√(-8--2)²+(7--1)²

D=√(-6)²+(8)²

D=√36+64

D=√100

D=10units

HELPP QUICKKK its timedd

Answers

Answer:

10

Step-by-step explanation:

What does "(-2)(6)" mean

Answers

Answer:

Step-by-step explanation:

it means that you do negative 2 times 6. That is -2 x 6, which is -12

Answer:

implied multiplication

Step-by-step explanation:

(-2)(6)

When two parentheses are next tow each other, there is implied multiplication

-2 * 6

-12

Suppose that the test score of a student taking the final of a probability course is a random variable with mean 76.

Required:
a. Give an upper bound for the probability that a student's test score will exceed 86. Suppose, in addition, that the professor knows that the variance of a student’s test score is equal to 25.
(b) What can be said about the probability that a student will score between 65 and 85?
c. How many students would have to take the examination to ensure, with probability at least .9, that the class average would be within 5 of 75? Do not use the central limit theorem.

Answers

Answer:

a. 0.8837

b. 0.6914

c. 10 student

Step-by-step explanation:

a. using markov's inequality; P(u >= X)<= E(u) / X

   mean u = 76

   X, test score = 86

= 76 / 86 = 0.8837

b. variance v = 25

   The test is between 65 and 85 P(65 <= X <= 85);

   P(|65 - X|<= |X - u| <= |85 - X|) = P(65 - 76 <= |X - u| <= 85 -76)

   = P(-11 <= |X - u| <= 9)

   = P(|X - u| <= 9)

using the chebyshev's inequality;

P(|X - u| <= 9) = 1 - variance / (standard deviation of individual test score)^2

   = 1 - 25/ 9^2

   = 1 - 25/81 = 1 - 0.3086 = 0.6914

c. P(|X - 76| <= 5) = 0.9

still using chebyshev's inequality;

= 1 - variance / lower limit^2 (E)

where E = 1 - 0.9 = 0.1

lower limit = 5

= 1 - 25/ 5^2 (0.1) = 10

25 Point Math Question Image Attached

Answers

X = hypotenuse x sin(angle)

Rewriting this with the given information:

Sin(26) = x/10

The answer is B.

Answer:

answer is B

Step-by-step explanation:

just got it right

HELP
i need a graph of 10x+6y=150

Answers

Rearrange the equation to get it into slope intercept form:

10x+6y=150

6y=-10x+150

y=-5/3x+25

The slope is -5/3, the y-intercept is 25. Graph below:

Answer:

See below

Step-by-step explanation:

Given

10x + 6y = 150

To graph the line easily, find x-intercept and y-intercept and connect those points with a line, that will be a graph you need.

x-intercept is the coordinate of x when y = 0

10x + 6*0 = 15010x = 150x = 15

y-intercept is the coordinate of y when x = 0

10*0 + 6y = 1506y = 150y = 25

We have now required points:

(0, 25) and (15, 0)

The graph is attached

can anybody help me and explain how to calculate it?​

Answers

Answer:

[tex]\frac{\pi }{4}[/tex]

Step-by-step explanation:

1. note, that

[tex]arcsin\frac{1}{2}=\frac{\pi}{6};arcsin\frac{\sqrt{2}}{2}=\frac{\pi}{4};arcsin1=\frac{\pi }{2};arcsin\frac{\sqrt{3}}{2}=\frac{\pi}{3}[/tex]

2. after the substitution:

[tex]\frac{\pi}{6}+\frac{\pi }{4}- \frac{\pi }{2} + \frac{\pi }{3}=\frac{\pi }{4}.[/tex]

What is the value of −|−20| + |−8| ÷ |−4| − |6|?

Answers

The answer is -24. Hope this helps


12. A company advertises on a website. A worker tracked the number of visits to the
website and the number of clicks on the advertisement. The table shows the data
for several days. A linear function can be used to model the data.
Website Advertisement
Number of Visits
to Website, X
Number of Clicks
on Advertisement, y
14
153
629
38
471
30
914
53
307
21
1,045
60
510
32
1,106
63
Based on the table, what is the best prediction of the number of clicks on the
advertisement if 1,500 people visit the website?

Answers

Answer:

The answer is 83

Step-by-step explanation:

It's a build up of a continental slope

Im in 8th grade and hope this helped

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