Respuesta :

leena

Hello!

[tex]\large\boxed{b = 10in}[/tex]

Formula for the area of a triangle:

A = 1/2(bh)

We are given the height and area, so we can plug those into the formula to solve for b:

90 = 1/2(18b)

Multiply both sides by 2:

180 = 18b

Divide both sides by 18:

b = 10 inches.

nyamekyecaleb82

Answer:

10inches is equal to the base

Step-by-step explanation:

formula for finding the area of a triangle is

½bh which is half times base times height

-base is unknown, height is 18 and area is 90.

-½x*18=90

½of 18 is 9

1x*9=90

9*x=9x

therefore:9x=90

we devide both sides by the co-efficient of x which is 9

9 dividing 90 is 10.

therefore x is equal 10

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