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Tju [1.3M]
3 years ago
15

Please help . Gets brainlest answer!!

Mathematics
1 answer:
AysviL [449]3 years ago
6 0

3. -x²+-4x+-8

To solve:

−4x−5+−1(x²+3)

−4x+−5+−1x²+(−1)(3)

−4x+−5+−x²+−3

Combine like terms.

−4x+−5+−x²+−3

(−x²)+(−4x)+(−5+−3)

5.

It is not in standard form since this answer does NOT have x=, y=, #=. It only has the numbers. So, this is NOT in standard form.

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Sari has 3 times as many pencil erasers as Sam. Together, they have 28 erasers. How many erasers does Sari have?
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Let

x--------> amount of erasers that Sari has

y--------> amount of erasers that Sam has


we know that


x=3y-------> equation 1

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Substitute equation 1 in equation 2

[3y]+y=28\\ 4y=28\\ y=28/4\\ y=7


find the value of x

x=3y\\ x=3*7\\ x=21


therefore


the answer is

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