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inn [45]
3 years ago
15

The height of a triangle is 4 m less than its base. The area of the triangle is 48 m^2. what is the length of its base?

Mathematics
2 answers:
RideAnS [48]3 years ago
5 0
Area = (1/2)bh   
h = b-4

(1/2)b(b-4) = 48
b(b-4) = 48 : (1/2)
b² - 4b = 96
b² - 4b - 96 = 0
D = (-4)² - 4·(-96) = 16 + 384 = 400 = 20²
b₁ = (4-20)/2 = -8     ∅
b₂ = (4+20)/2 = 12

The length of the base = 12 m
fenix001 [56]3 years ago
4 0
24 m  is the correct answer for your question
       
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2 years ago
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leonid [27]

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Step-by-step explanation:

Let x represent the cost per unit of electricity.

Let y represent the cost per unit of gas.

During one month, a homeowner used 600 units of electricity and 100 units of gas for a total cost of $344. It means that

600x + 100y = 344- - - - - - - - - -1

The next month, 400 units of electricity and 250 units of gas were used for a total cost of $299.

It means that

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