(4*7/2)+(15*7)+(7*6/2) = 140
Answer:
a = 9
Step-by-step explanation:
a^2 = 41^2 - 40^2
a^2 = 1681-1600 = 81
a = 9
Step-by-step explanation:
this can be found by determination of the highest and lowest x values
Try the first one, it looks right since it’s all in sequenced right
Use a proportional that will give you x=4