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3 years ago

8

Solve for y. PLEASE HELP ME THANK YOU

2 answers:

pshichka [43]3 years ago

8 0

Answer:

10. I just took the test

Step-by-step explanation:

melomori [17]3 years ago

7 0

It's an equilateral triangle. The angles have measure 60°.

Therefore we have the equations:

6x + 6 = 60 <em>subtract 6 from both sides</em>

6x = 54 <em>divide both sides by 6</em>

x = 9

5y + 10 = 60 <em>subtract 10 from both sides</em>

5y = 50 <em>divide both sides by 5</em>

y = 10

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the length of a rectangle is 3cm less than its width. The perimeter is 54 cm. What are the dimensions of the rectangle

solong [7]

Answer:

The dimensions of the rectangle:

length: 12cm

width: 15 cm

Step-by-step explanation:

The perimeter of a rectangle is:

perimeter = 2(length+width)

54 = 2(a+b)

a = b - 3

a = legth

b = width

then:

54 = 2((b-3)+b)

54/2 = b-3 + b

27 = 2b - 3

27 + 3 = 2b

30 = 2b

b = 30/2

b = 15

a = b-3

a = 15 - 3

a = 12

Check:

54 = 2(15+12)

54 = 2*27

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Step-by-step explanation:

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