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2 years ago

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In a parallelogram whose area is 15, the base is represented by x+7 and the altitude x-7. Find the base of parallelogram.

1 answer:

Sati [7]2 years ago

7 0

Area = (base)*(height)
15 = (x+7)(x-7)
(x+7)(x-7) = 15
x^2 - 49 = 15
x^2 - 49+49 = 15+49
x^2 = 64
sqrt(x^2) = sqrt(64)
x = 8 ... note that x can't be negative

If x = 8, then the base is...
x+7 = 8+7 = 15

Therefore the base is 15 units.
(the height is x-7 = 8-7 = 1 unit)

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Step-by-step explanation:

Let 'x' be the Adult's tickets

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(-5x-y)- x+y=1185-2757

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x= (-1572)÷-4

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=393+y=1185

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So Number of Adults Ticket=393

Number Of Students Tickets=792

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