Answer:
The answer is D
Step-by-step explanation:
You use base times height
1/2bh
=1/2(2x+5)(4x)
(30.26/35.6)*100= 85%
check: .85 * 35.6 = 30.26
-10 + a = 6a - 7a
Rearrange the left hand side
a - 10 = 6a - 7a
Simplify 6a - 7a
a - 10 = -a
Add a on both sides
2a - 10 = 0
Add 10 on both sides
2a = 10
Divide by 2 on both sides
a = 5
You divide the top number by the bottom number then divide that number by another one. you can also find the greatest common factor and make the denominators equal then divide the fraction and then turn it into a decimal