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Mazyrski [523]
3 years ago
12

Two math classes took the same classes

Mathematics
1 answer:
Thepotemich [5.8K]3 years ago
4 0
They're best buds.

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A rectangle is 5 cm wider than twice its length. If the perimeter of the rectangle is 70 cm, then what is the area?
kifflom [539]

Step-by-step explanation:

The dimensions of the rectangle are two unknowns: The length "l" and the width "w"

The perimeter of a rectangle is found as P = 2*l + 2*w

We also know that the length is 5cm more than twice the width. l = 2*w + 5

These two equations gives us a system of linear equations.

P = 2*l + 2*w

l = 2*w + 5

We can use substitution to replace the "l" in the first equation with 2*w + 5

P = 2*(2*w + 5) + 2*w

P = 4*w + 10 + 2*w

P = 6*w + 10

we know the perimeter is 70

70 = 6* w + 10

subtract 10 from both sides

60 = 6* w

w = 10

Now that we know the width, we can find the length by substituting 10 for "w" in the second equation.

l = 2* 10 + 5

l = 20 +5

l = 25

the dimentions of the rectangle are 25cm x 10 cm

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3 years ago
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Which of the following numbers can be expressed as a decimal that terminates?
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3/2- 1.5 and 3/4- .75
7 0
3 years ago
Turn 8/20 into a fraction and simply it
den301095 [7]

Answer: I got 2/5

Hope it helped

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Last question on the quiz
Sveta_85 [38]

Answer: 152 degrees.

Step-by-step explanation: Since angle 1 and angle 5 are alternate exterior angles, they are congruent. Thus, angle 5 is also equal to 152 degrees.

6 0
3 years ago
Nancy has worn a blue skirt on 8 of the last 20 days.
Gala2k [10]

Answer:

it's just 8/20 so shade 8/20 of the circle

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