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abruzzese [7]
3 years ago
12

The base of a triangle is 7 less than twice its height. if the area of the triangle is 102cm^2 find the length of the base

Mathematics
1 answer:
Gre4nikov [31]3 years ago
7 0
B=2h-7
Area of a triangle: A=1/2 of bh
replace b with 2h-7: A=(1/2)(2h-7)h=102 => (2h-7)h=204
2h^2-7h-204=0
factor or use quadratic function to solve
h=12
b=2*-7=17
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Step-by-step explanation:

You first would multiply each term in the parenthesis by 9v^2

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After this you combine the like terms

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2. The area of the circles is 2(π*2^2), which is about 25.1. The rectangle's area can be found as 2π*2*3, which is about 37.7. The total is rounded to 62.8 m^2 (D)

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<h2>Anser</h2>

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Step-by-step explanation:

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