The area of a trapezoid is 40 square inches. The bases of the trapezoid are 9 inches and 11 inches long. Explain how to find the height of the trapezoid.

The height is 4 inches.

Step-by-step explanation:

The formula for determining the area of a trapezoid is expressed as

Area = 1/2(a + b)h

Where

a and b are the length of The bases are the 2 sides of the trapezoid which are parallel with one another.

h represents the height of the trapezoid.

From the information given,

a = 9 inches

b = 11 inches

If It has an area of 40 inches² , then

40 = 1/2(9 + 11)h

Cross multiplying by 2, it becomes

40 × 2 = (9 + 11)h

80 = 20h

h = 80/20 = 4 inches

option c) graph of line going through 1, 4 and 3, 10

step-by-step explanation:

let y equal to margo's coin collection

let x equal to number of years

at the begining x=0, y=1 → point=(x,y)→point=(0,1)

she adds 3 coins per year, then y=1+3x

at x=1, y=1+3(1)=1+3→y=4→point=(x,y)→point=(1,4)

at x=3, y=1+3(3)=1+9→y=10→point=(x,y)→point=(3,10)

the graph of line going through (1, 4) and (3, 10), then the option c is the correct.

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step-by-step explanation: