Answer:
addition property of equality
Step-by-step explanation:
x-7=5 to cancel add 7 to each side
x-7+7=5+7
x=12
Answer:
Which expression is equivalent to 8.7u+1.4+3.2u−9.5 ?
you can just split the figure in 2 separate figures and them add the areas:
area rec. 1:
3m×3m= 9m²
area rec. 2:
3m× (2m+3m)
= 3m×5m
=15m²
total area:
9m²+15m²= 24m²
Answer:
Step-by-step explanation:
Given that at time t, the position of a body moving along the s-axis is sequalsnegative t cubed plus 15 t squared minus 72 t m
i.e. 
Velocity is nothing but s'(t) = derivative of s
and acceleration is s"(t) = derivative of v(t)

a) v(t) =0 when t = 4 or 6
b) 
a(t) =0 when t =5
c) Distance travelled by the body from 0 to 5 would be

i.e. 110 miles (distance cannot be negative)
Answer:
91
Step-by-step explanation:
90.5 needs to be a whole number, and if it ends in 5 you round it up