Jess spent 7x minutes on the computer. her sister spent 5 x + 10 minutes on the computer, which was the same amount of time jess spent. how many minutes was jess on the computer?

35 minutes

Step-by-step explanation:

Given : Jess spent 7x minutes on the computer.

Her sister spent 5 x + 10 minutes on the computer, which was the same amount of time Jess spent.

Thus , we have

Subtract 5x from both the sides , we get

Divide both sides by 2, we get

Now, the time spent by Jess = 7(5)=35 minutes

Hence, Jess was 35 minutes on computer.

geometry: triangles

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lessons

answers archive

call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

25.45584

your answer is

a.

5

step-by-step explanation: