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4 years ago

Need help!! Don't understand algebra. I need help figuring out 18x2 + 9x - 20

1 answer:

8 0

The answer is (6x-5)(3x+4)

Write 9x as a sum or difference.
18x^2+24x-15x-20
Factor out 6x from the expression.
18x^2+24x
Factor out -5 from the expression.
-15x-20
Factor out 3x+4 from the expression.
6x(3x+4)-5(3x+4).

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3 years ago

A dog won a race at the local fair by running 3 and one fourth miles in exactly 2 hours. At this constant rate, how long does i

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Answer:

$\frac{4}{5}$ hour

Step-by-step explanation:

Let x represent time taken by dog to run the 1 and three tenths -mile state fair race.

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We will equate both speeds as:

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Cross multiply:

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