by multiplication of 15 and 5.81 answer is the
87.15
6, the formula is (b1+b2/2)*h
8+12/2=10
10*h=60 so h=6
x=7x-21
Step-by-step explanation:
- x=7x-21
- 21=7x-x
- 21=6x
- x=21/6
- x=7/2
- x=3.5
It's letter C .
Hope this help :)
The value as in adding them is 19
