1. If a student's course grade was a B, what is the probability that a randomly selected student did at least 30 minutes of homework at night?

2. Are the events "did at least 30 minutes of homework l" and "course grade is a B" independent? Explain your answer.​

Answer:

y=1/3x-4

Wish i could explain but i gtg

Step-by-step explanation:

Answer:

$12=$60÷5. 12dollars is the answer

Answer:

32/45

Step-by-step explanation:

2/3 : 3/2 : 5/8

Remember, a ratio and a fraction are both division. Therefore you can rewrite the problem like so:

2/3 ÷ 3/2 ÷ 5/8

Dividing fractions is the same as multiplying them by the reciprocal.

2/3 * 2/3 * 8/5

Now simplify:

32/45

32 and 45 have no common factor, hence the final answer is 32/45

Answer:

32/45

Step-by-step explanation:

2/3 : 3/2 : 5/8.

Remember, a ration and a fraction are both division. Therefore you can rewrite the problem like so:

2/3 ÷ 3/2 ÷ 5/8

Dividing fractions is the same as multiplying them by the reciprocal.

2/3 * 2/3 * 8/5

Now simplify:

32/45

32 and 45 have no common factor, hence the final answer is 32/45

May I have brainliest please? :)

Answer:

More info

Step-by-step explanation:

I need more info than that please!`

1 feet = 12 inches  

3 feets= 36 inches

8 feets = 96 inches

hope this helps  

Assume the year that it would take to these trees have the same height is : x (years)

After x years, type A tree has heigth: 36 +23x (inches)

After x years, type B tree has heigth: 96 +17x (inches)

We have  36+23x = 96+17x

Solve the equation, we have x=10

Conclusion: It will take 10 years to these trees have the same height.

Answer:

(-1, 1)

General Formulas and Concepts:

Pre-Algebra

Algebra I

Step-by-step explanation:

Step 1: Define systems

3 + 2x - y = 0

-3 - 7y = 10x

Step 2: Rewrite systems

3 + 2x - y = 0

Step 3: Redefine systems

y = 2x + 3

-3 - 7y = 10x

Step 4: Solve for x

Substitution

Step 5: Solve for y

Step 6: Graph

Check the solution set.

Answer:

Dos cadenas de operaciones matemáticas distintas, cuyo resultado sea 325 utilizando las 4 operaciones básicas (suma, resta, multiplicación y división) pueden ser las siguientes:

((2 + 8) / 2) x 65 = 325

10 / 2 x 65 = 325

5 x 65 = 325

325 = 325

((300 / 10) x 15) - 130 + 5 = 325

(30 x 15) - 130 + 5 = 325

450 - 130 + 5 = 325

325 = 325

The 2 different chains of operations resulting in 325 using the 4 basic operations are;

[tex]=[(500 +(450\times2)) - 100]\div4\\=[(500+900)-100]\div4\\=[1400-100]\div4\\=1300\div4\\=325[/tex]

and;

[tex]=[(140 +125)-135)] \div 2]\times5\\=[(265-135)\div2] \times 5\\=(130\div2)\times 5\\=65\times 5\\=325[/tex]

According to the question, we are to find 2 different chains of operations resulting in 325 using the 4 basic operations.

The four basic operations are addition(+), subtraction(-), division(÷) and multiplication (×).

One of the chains of operation will be:

[tex]=[(500 +(450\times2)) - 100]\div4\\=[(500+900)-100]\div4\\=[1400-100]\div4\\=1300\div4\\=325[/tex]

Another chain of reaction will be:

[tex]=[(140 +125)-135)] \div 2]\times5\\=[(265-135)\div2] \times 5\\=(130\div2)\times 5\\=65\times 5\\=325[/tex]

Learn more here: https://brainly.com/question/22224175

Answer:

(x+1)^2+(y+4)^2=16

Step-by-step explanation:

equation of the circle

(x-x0)^2+(y-y0)^2=r^2

where x0 and y0 is center of circle

and r is radius of the circle.

we know that the center point is the middle of the diameter

so x0=(x1+x2)/2

x0=(3+(-5))/2=-2/2=-1

y0=(-4+(-4))/2=-8/2=-4

so the midpoint or the center of circle is the points (-1,-4)

the formula to find the distance between two. points is √[(x2-x1)^2+(y2-y1)^2]

so r is the distance between the center point and one of the diameter endpoints.

let us take points (3,-4) and center point (-1,-4)

√(-1-3)^2+(-4-(-4))^2=

√(-4)^2+0^2=

√16=4

so the radius of the circle is 4

now the equation of the circle will be

(x-(-1))^2+(y-(-4))^2=4^2

(x+1)^2+(y+4)^2=16

Answer:

10

Step-by-step explanation:

radius is the middle point of a circle, therefore divide it in half.

Answer:

126

Step-by-step explanation:

if it have 9 trips and each trip there is 14 people so we do 14×9=126

Answer:

there isn't even a y here

Step-by-step explanation:

Did you not write the while question?

Answer: its should be 2.0 and 4.5 on it ✨

Step-by-step explanation: trusttt me

Answer:

D. 1/h+5

Step-by-step explanation:

f(x)=1/3+h+2

F(x)=1/h+5

Answer:

I don't believe any are correct, from what I know its 36.9.

Step-by-step explanation:

sorry I know this isn't help full good luck!

Answer:

x < 9

Step-by-step explanation:

-3x + 14 > -13

-3x > -13 - 14

-3x > -27

-x > -27 ÷ 3

-x > -9

x < 9

Answer:

explaination. a ah. is

Answer:

z

Step-by-step explanation:

sdggsgsgdd

Answer:

im sorry

Step-by-step explanation:

i ned help on the same question

Answer:

Quotient: 3x+3

remainder: -2x+5

Step-by-step explanation:

Use polynomial long division

Answer:

A=[tex]\pi r^{2}[/tex]

2 is less than or equal to x is less than or equal to 4

Answer:

-3/4

Step-by-step explanation:

3x+4y=12

-3x -3x

4y=-3x+12

÷4 ÷4

y=-3/4x+12

Answer:

-3/4 or -0.75

Example:

Answer:

25.13 or 8pi

Step-by-step explanation:

Answer: 1/9 of a mile

Step-by-step explanation:

3/27=x/1

27x=3

Divide by 27

3/27=1/9

Answer:

9

Step-by-step explanation: 9 +9 +9=27

Answer:

The solution is:

Step-by-step explanation:

Given the expression

[tex]0.5^{10}\div 0.5^7[/tex]

Solving

[tex]\frac{0.5^{10}}{0.5^7}[/tex]

[tex]\mathrm{Apply\:exponent\:rule}:\quad \frac{x^a}{x^b}=x^{a-b}[/tex]

so

[tex]\frac{0.5^{10}}{0.5^7}=0.5^{10-7}[/tex]

[tex]\mathrm{Subtract\:the\:numbers:}\:10-7=3[/tex]

[tex]=0.5^3[/tex]

[tex]=0.125[/tex]        ∵ [tex]0.5^3=0.125[/tex]

Therefore, the solution is:

[tex]\frac{0.5^{10}}{0.5^7}=0.125[/tex]

Answer:

56

Step-by-step explanation: so 5+6=11, 65 is th

reverse of 56, 56+9=65

Answer:

there is nothing here so??

Answer:

where??? uhhhhhhhh lol

Answer:

x=2

Step-by-step explanation:

3x-8=6-12x+16

3x+12x=22+8

15x=30

x=2

Answer:

x=2

Step-by-step explanation:

It's right bc I took the test and got it 100%