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2 years ago

Solve the System using elimination. 5x-2y=15 7x+7y=-28

Mathematics

1 answer:

steposvetlana [31]2 years ago

8 0

Answer:

x=1 y=-5

Step-by-step explanation:

7(5x-2y=15) ---> 35x-14y=105

2(7x+7y=-28) --> + 14x+14y=-56

49x=49 --->x=1

5(1)-2y=15 ---> 5-2y=15 ---> -2y=10 ---> y=-5

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3 years ago

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How do i solve using the substitution method? x+y=-1 y=-2x

leonid [27]

Answer:

$(1, -2)$

Step-by-step explanation:

Step 1: Set the second equation into the first

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3 years ago

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frozen [14]

Answer:

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2 years ago

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A cylindrical tank has a radius of 15 feet and a height of 45 feet. How many cubic feet of water can the tank hold?

ch4aika [34]

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V=\pi r^2 h\quad 
\begin{cases}
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3 years ago