Below are the steps one student took to solve the given equation. The student made one mistake.
Look at the work to find the mistake. Then, describe
this mistake on the lines provided.
2n + 5 - On = 13
8n + 5 = 13
8n = 8
n=1

your answer is the last one

step-by-step explanation:

divide the length of a'c' by the length of ac to get a scale factor of two

& then reflect vertically (over the y-axis)

so your answer is dilation by a scale factor of 2 followed by reflection over the y-axis

10000

step-by-step explanation: divide by 2,

you didn't give me the choices, so i will just give you the graph so you can look at your choices and choose the right one.

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4