Which expression is equivalent to -2(3a + 6b) + (4a - 2b)?
1 answer:
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Answer:
31.5 cm²
Step-by-step explanation:
Calculate area of a triangle with this formula:
Area = base * height
Substitute in known values
Area = 7 * 9
Multiply 7 by 1/2
Area = 3.5 * 9
Multiply
Area = 31.5 cm²
Hope this helps :)
The surface area of the trapezoidal prism is: 4,190 in.².
<h3>What is the Surface Area of a Trapezoidal Prism?</h3>Surface area = (b1+b2)h + PH, where:
- Length of the base of the trapezoid (b1) = 20 in.
- Length of the base of the trapezoid (b2) = 60 in.
- Height of the trapezoid (h) = 15 in.
- Perimeter of the trapezoid (P) = 60 + 25 + 20 25 = 130 in.
- Height of the prism (H) = 23 in.
Plug in the values
Surface area = (b1+b2)h + PH = (20 + 60)15 + (130)(23)
Surface area = 4,190 in.²
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