labarmakenzie884
05.05.2020 •
Mathematics
3. A rectangle has width 2x and length 2x+4.
2x metres
(2x + 4) metres
a) Find an expression for the perimeter of this rectangle.
b) Find the value of x if the perimeter is 240 metres.
c) Find the length and the width.
4.a) Write an expression for the perimeter of the rectangle.
(x - 2) cm
(3x + 4) cm
b) Simplify the expression.
c) What is the perimeter when x = 5?
d) What is the value of x when the perimeter is 60 cm?
e) What are the dimensions of the rectangle when the perimeter is 60 cm?
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Ответ:
b-29
c-w=58 l=62
4a-2(3x+4)+2(x-2)
b-8x+4
c-44
d-7
e-5 and 25
Ответ:
9.1k =63.7 =
k = 63.7/9.1
k = 7