The rectangle shown has a length of 4x+3 and a width of 3x. Show your work. (3 points) Find the perimeter. Find t

Question

The rectangle shown has a length of 4x+3 and a width of 3x. Show your work. (3 points)

Find the perimeter.

Find the area.

Find the perimeter and area if x = 8.

in progress 0
Iris 2 weeks 2021-09-08T20:56:09+00:00 1 Answer 0

Answers ( )

    0
    2021-09-08T20:57:33+00:00

    Answer:

    Perimeter 14x + 6 units

    Area 12x^2 + 9x

    At x = 8

    Perimeter is 118 units

    Area is 840 square units

    Step-by-step explanation:

    The perimeter of the rectangle is 2(l + b)

    = 2(4x + 3 + 3x) = 2(7x + 3) = 14x + 6 units

    The area of the rectangle is L * B = 3x(4x + 3)

    opening the bracket, we have 12x^2 + 9x units

    As x = 8

    We substitute the value of x in each of the area and perimeter

    for perimeter 14x + 6 = 14(8) + 6 = 112 + 6 = 118 units

    For the area

    12x^2 + 9x = 12(8)^2 + 9(8) = 768 + 72 = 840 square units

Leave an answer

45:7+7-4:2-5:5*4+35:2 =? ( )