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laiz [17]
3 years ago
8

What number would you multiply the 2nd equation by in order to eliminate the y terms?

Mathematics
1 answer:
leonid [27]3 years ago
7 0

Answer:

x=3

y=-1

Step-by-step explanation:

first multiply the 2nd row by 2 so you will get

4x-4y=16

4x+2y=10

then subtract the 2nd row from the first row and so you will get

-6y=6

then solve for y in the above equation

y=-1

then substitute y=-1 into any 2 equations .

i picked the first 1

4x-4 × -1=16

then solve for x .

you will get

x=3

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What does h equal in the equation S=2πr2+2πrh?
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:

S

−

2

π

r

2

2

π

r

=

2

π

r

h

2

π

r

S

−

2

π

r

2

2

π

r

=

2

π

r

h

2

π

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−

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2

π

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S

2

π

r

−

2

π

r

2

2

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r

h

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2

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−

2

π

r

2

2

π

r

h

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S

2

π

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−

r

2

r

h

=

S

2

π

r

−

r

4 0
3 years ago
Find the area of the circle. Round your answer the nearest whole number, if necessary.
mina [271]

Answer:

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Step-by-step explanation:

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<u><em>< Sarah ></em></u>

8 0
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