7.5+k=10 7.5+k-7.5=10-7.5 step 1 k=2.5 step 2 find her mistake
a: step 1
b: step 2
c: no mistake

the answer is (4,3)

since the rule for r0, 90º is (-y,x) and it was already applied to form the image, all you have to do is reverse the answer using this formula.

the forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?