3 years ago

(HELP) solve the system by substitution. check your answer. 4x+5y=7x=5y+8

Mathematics

1 answer:

Marina86 [1]3 years ago

5 0

For this equation after the substitution you will get y=-1.

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How to rationalize the denominator of sqrt(a)/sqrt(a)-2

aivan3 [116]

Answer:

√a(√a + 2) a - 2√a

----------------- = -----------------

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I am assuming that by "sqrt(a)/sqrt(a)-2" you meant:

√a

----------

√a - 2

To rationalize the denom., multiply numerator and denom. of this fraction by the conjugate of √a - 2, which is √a + 2:

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-----------------

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3 years ago

(HELP) solve the system by substitution. check your answer. 4x+5y=7x=5y+8​

(HELP) solve the system by substitution. check your answer. 4x+5y=7x=5y+8