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ololo11 [35]
3 years ago
6

I need an explanation on how to solve linear systems by substitution.

Mathematics
1 answer:
vekshin13 years ago
8 0
Okay so you have 2 equations. so take one and solve for y. ex: y=3+2x
the next equation that involves the y put that in replace of it for ex: 2y=3+3x
2(3+2x)=3+3x
6+4x=3+3x
then solve per usual.
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Step-by-step explanation:

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Pls help quick will put brainliest
Olin [163]

Answer:

m<SQP=124°

Step-by-step explanation:

Hi there!

We're given ΔQRS, the measure of <R (90°), and the measure of <S (34°)

we need to find m<SQP (given as x+72°)

exterior angle theorem is a theorem that states that an exterior angle (an angle on the OUTSIDE of a shape) is equal to the sum of the two remote interior angles (the angle OUTSIDE of a shape will be equal to the sum of 2 angles that are OPPOSITE to that angle).

that means that m<SQP=m<R+m<S (Exterior angle theorem)

substitute the known values into the equation

x+72°=90°+34° (substitution)

combine like terms on both sides

x+72°=124° (algebra)

subtract 72 from both sides

x=52° (algebra)

however, that's just the value of x. Because m<SQP is x+72°, add 52 and 72 together to get the value of m<SQP

m<SQP=x+72°=52°+72°=124° (substitution, algebra)

Hope this helps!

4 0
3 years ago
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nikklg [1K]

Answer:

k = 4

Step-by-step explanation:

7k - 6 = 2k + 14

(7k - 2k) - 6 = (2k - 2k) + 14

5k - 6 = 14

5k (- 6 + 6) = 14 + 6

5k = 20

5k/5 = 20/5

k = 4

4 0
3 years ago
Read 2 more answers
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