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3 years ago

11

Please help fast. will mark brainliest

1 answer:

Harman [31]3 years ago

6 0

X=-3 It’s pretty simple, look at the line starting from (4,0) and look at the other side of the line in the second quadrant; (-3,7).

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It takes 40 minutes for 8 people to paint 4 walls. how many minutes does it take 10 people to paint 7 walls?

timurjin [86]

Its not 70 its 56, because you have to see how many minutes it takes for 1 to do 4 walls which would be 40*8.
Then you have to see if how many minutes its take a person to do one wall which is 8*40/4 from getting the amount of the 1 person doing 4 walls and get 80.
Then you need to see how many walls a person can paint 7 walls out of 10 people.So, we know how many minutes for each wall which is 80 and then multiply it by 7 to get 560 and divide it by 10 to get a product of 56.

7 0

3 years ago

Read 2 more answers

The sum of the areas of two circles is 80 pie square meters. Find the length of a radius of each circle if one of them is twice

Svetach [21]

Answer:

The radius of the circles are $4\ m$ and $8\ m$

Step-by-step explanation:

Let

x-----> the radius of larger circle

y----> the radius of smaller circle

we know that

$\pi x^{2} +\pi y^{2}=80\pi$

$x^{2} +y^{2}=80$ -----> equation A

Remember that

$x=2y$ -----> equation B

substitute equation B in equation A and solve for y

$(2y)^{2} +y^{2}=80$

$4y^{2} +y^{2}=80$

$5y^{2}=80$

$y^{2}=16$

$y=4\ m$

Find the value of x

$x=2y$

$x=2(4)=8\ m$

therefore

The radius of the circles are $4\ m$ and $8\ m$

4 0

3 years ago

Out of 1200 students of a school only 85% passed. how many students failed?

DerKrebs [107]

Answer:15

Step-by-step explanation:

If 85% pass then 15% failed and 15% of 1,200 is 180 so 180 people failed.

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3 years ago

Which statement best describes the 50% rule?

Klio2033 [76]

Answer:

1. $18.75

2.$83.75

3. Individuals should spend up to only %50 of their medium-term savings then build savings back up.

4. Permanent life insurance policies insure policy holders for as long as they pay a premium.

5. She saves $84 (here is the link with the work brainly.com/question/12276113)

Step-by-step explanation:

Just took it and got all the multiple choices right.

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3 years ago

Which expression is a perfect cube?

faust18 [17]

Answer:

D

Step-by-step explanation:

D

8 0

2 years ago