Answer:
23
Steps ig
((8x2) +2x(-3)))-(((-(-4)) x 2) +( 3 x( -7)) =23
Answer: 3 mi/h
Step-by-step explanation:
Here we have to find the speed 
at which Sarah walks to school, knowing the distance 
she has walked and the time 
she expends.
So, in this case we can use the following equation:
Where:
Solving:
This is Sarah's speed
Step-by-step explanation:
A = pi × r²
A = pi × 13²
A = 530.93 km²
X is:
tan50 = 28 / x
1.19 = 28 / x
1.19 / 28 = x
x = 0.04
But Im not sure
About the area of triangle
You can use the both formula
