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Elis [28]
3 years ago
13

3.) Which expression(s) are equivalent to 20?

Mathematics
1 answer:
Goryan [66]3 years ago
8 0

Your choices of answers are not clear, is the letter x a variable or a multiplication?

If it is possible, take a picture of your question.

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Simplify by combining like terms.2(−4y − 9) − 5y
jenyasd209 [6]
Multiply out the brackets first.
So 2(-4y-9)-5y becomes -8y-18-5y   [2 times -4y and 2 times -9]
Then simplify -8y-5y-18 to the answer ......-13y-18 or -(13y+18)
4 0
3 years ago
If the length of a rectangle is halved and its breath is tripled, what is the percentage change in its area??
Dennis_Churaev [7]

Answer:

A 50% increase

Step-by-step explanation:

Area = length x breadth

Let illustrate this with an example

original dimensions

length = 4

breadth = 5

area = 4 x 5 = 20

new dimensions

length = 4/2 = 2

breadth = 5 x 3 = 15

area = 15 x 2 = 30

Percentage change = 30 - 20 / 20 x 100 = 50%

6 0
3 years ago
Joe spends S3 per square foot on carpet for a square room. If he spends
Serjik [45]

Answer:

12 square feet

Step-by-step explanation:

You can find out how many square feet he bought by dividing 432 by 3.

432/3=144

Now, you need to find the square root of that to find the length of just one side of the room.

\sqrt{144}=12

4 0
3 years ago
Read 2 more answers
Find the slope of the line through the given points.<br> (-2,7) and (2,-5)
Andreyy89

Answer:

y = -3x + 1

Step-by-step explanation:

hope this is right!

4 0
3 years ago
Write a system of linear equations for the graph below
Oliga [24]
1q+2x-1 liner #1 liner # is 18% one
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