and
use the second expression to calculate the left-hand side of the first equation:
Add 10 to both sides if this equation to get
and divide both sides by 2
this proves that x = 17, give the two initial equations
Answer:
5 + x ≤ 15
Step-by-step explanation:
21.4 mm
area ÷ base = height
164.78 mm^2 ÷ 7.7 mm
Check:
base • height = area
7.7 mm • 21.4 mm = 164.78 mm^2