2 years ago

Solve the problem using ELIMINATION 20x + 2y = 18 10x + y = 9

Mathematics

1 answer:

sesenic [268]2 years ago

4 0

Answer:

Infinitely many solutions.

Step-by-step explanation:

Multiply the second equation by -2, then add the equations together

(20x+2y=18)

−2(10x+y=9)

20x+2y=18

−20x−2y=−18

Add these equations to eliminate x

0=0

Infinitely many solutions.

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Distance between (-3,1) (1,5)

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2 years ago

Evaluate (18)^2-(15)^2<br> Please show working.

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Answer:

Step-by-step explanation:

You can solve it by Squaring/multiply 18 by itself and 15 by itself then subtract them both:

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You could also do difference of two squares:

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