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4 years ago

8

the length of a rectangle is 4cm less than twice it’s width. the perimeter of the rectangle is 34 cm. what are the dimensions of

the rectangle

1 answer:

iragen [17]4 years ago

3 0

Answer:

w=width

l= 2w-4

perimeter of a rectangle = 34

34 = 2(2w-4+w)

34 = 4w-8+2w

34 = 6w-8

6w = 34+8

6w = 42

w = 42/6

width = 7

length = 2w-4

= 2(7)-4

= 14-4

= 10

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Answer:

1)

$10t=8+9t+5$

$10t=9t+13$

$10t-9t=13$

$t=13$

2)

$-12=3x$

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3)

$-5+3x=x+9$

$3x=x+9+5$

$3x=x+14$

$3x-x=14$

$2x=14$

$\frac{2x}{2}=\frac{14}{2}$

$x=7$

4)

$10a=-15+7a$

$10a-7a=-15$

$3a=-15$

$\frac{3a}{3}=\frac{-15}{3}$

$a=-5$

5)

$7x=6x+27$

$7x-6x=x$

$x=27$

6)

$-3x-6=-5x+10$

$-3x=-5x+16$

$-3x+5x=16$

$2x=16$

$\frac{2x}{2}=\frac{16}{2}$

$x=8$

7)

$2y-4=10y+12$

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$\frac{8y}{8}=\frac{-16}{8}$

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8)

$-9a+1=6-4a$

$1=6+5a$

$1-6=5a$

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$\frac{5a}{5}=\frac{-5}{5}$

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Hope this helps!

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3 years ago