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A section of a rectangle is shaded.
The area of the shaded section is 63 square units.
What is the value of x?
09 units
0 11 units
O 18 units
O 21 units

A section of a rectangle is shaded The area of the shaded section is 63 square units What is the value of x 09 units 0 11 units O 18 units O 21 units class=

Respuesta :

wangjing2312

Answer:

x=11

Step-by-step explanation:

Area of trapezoid:

[tex] \frac{(a + b)h}{2} [/tex]

a=7

b=x

h=7

Area=63

[tex]63 = \frac{7(7 + x)}{2} \\ \frac{126}{7} = 7 + x \\ x = 11[/tex]

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