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sattari [20]
3 years ago
8

3x + y = 8. -x - 2y = -10

Mathematics
1 answer:
mojhsa [17]3 years ago
5 0
Assumin we solving for the intersection or solution

elimination, ya


eliminate y's

multiply firs equation by 2 and add to 2nd

we get
6x+2y=16
<u>-x-2y=-10 +</u>
5x+0y=6

5x=6
divide both sides by 5
x=6/5

sub back
-x-2y=-10
-6/5-2y=-10
times both sides by 5
-6-10y=-50
add 6 to both sides
-10y=-44
divide both sides by -10
y=44/10
y=22/5


(x,y)
(\frac{6}{5},\frac{22}{5})
or
(1.2,4.4)
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Answer: 28.35\ minutes

Step-by-step explanation:

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3 0
3 years ago
Factor each completely
avanturin [10]
K^2-5k-50
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This is because k*k=k^2 (your first term), 5k-10k=-5k (your second term) and -10*5=-50 (your last term).

Distribute to check.
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