Before he started he knew 10 vocabulary items. Hence, the y-intercept is (0, 10), 0 being the 0th day.
He learns 3 new words every day, so the slope is 3.
The equation is y = 3x + 10.
The equation for perimeter is 2w + 2l. When you substitute this in you get:
2(3m+5) + 2(2m+3)
6m + 10 + 4m +6
10m + 16
Hope this helps
12 Cells . 6 Because You're Doing Half A Hour For 3 Hours . Then Multiply By 2 . This Answer Will Land You A 6 .