Answer:
Using the elimination method to solve for x and y; ANSWER: y=2 & x=-20
Step-by-step explanation:
1) It helps to visualize the equation if you put the second equation underneath the first like regular adding.
(2x+10y= -20)
+ (-x+4y= 28)
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2) You always want to cancel out one value (x or y) to start the process.
In this case, if I can get a -2x to cancel out 2x (neg. and positive cancel), that would cancel out the x's in the two equation. To do that, I would multiply by 2 to the second equation and add like you would normally (like terms with like terms, x with x and y with y)
2x+10=-20 2(-x+4y=28) ---> 2x+10y= -20 <u><em>plus</em></u> -2x+8y=56 --->18y=36 (this is the final simplified outcome)
3) find y so y =36/18 so y =2
4) Plug y=2 back into one of the original equation and solve for x
2x+10(2)= -20 ---> x=-20
Answer:
If you are only measuring sq ft of one wall the answer would be 136 sq ft. If it is asking for all four walls, then the answer would be 544
Step-by-step explanation: I figure it out by doing 16*8.5, which gave me 135 sq ft fo each wall. Then I multiplied it by 4 to get 544 sq ft.
The answer is 28.1 tenths are the first number to the right of the decimal point
One hundred fifty-seven millionths. Hope that helps!
