9514 1404 393
Answer:
-15, 3
Step-by-step explanation:
3|x+6| -7 = 20
3|x +6| = 27 . . . . add 7
|x +6| = 9 . . . . . . divide by 3
This resolves to two equations:
x + 6 = 9
x = 3 . . . . . subtract 6
and
x + 6 = -9
x = -15 . . . . subtract 6
Last month, 17 people showed up to help a local charity. This month, 55 people volunteered. What is the percentage increase?
1 answer:
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Answer:
135 cm²
Step-by-step explanation:
The area (A) of a trapezoid is calculated as
A = h(a + b)
where h is the height and a, b the parallel bases
Here h = 9, a = 13 and b = 17 , thus
A = × 9 × (13 + 17)
= 0.5 × 9 × 30
= 135 cm²