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3 years ago

PLEASE HELP ME!! Show all work. Must be in standard form. Simplify (3x^2+4x-7)-9x^2-x+3)

Mathematics

1 answer:

elena-14-01-66 [18.8K]3 years ago

7 0

I think this is the answer

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Find the retail price original price: 119.00; Markdown: 70%

12345 [234]

First you substitute into the equation is/of=%/100. By that, I mean, 119/x=70/100. Cross multiply to get 119(100)=70x. Solve for x=170

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4 years ago

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How do you know if a table is proportional

alexgriva [62]

Answer:

To see if multiple ratios are proportional, you could write them as fractions, reduce them, and compare them. If the reduced fractions are all the same, then you have proportional ratios.

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3 years ago

Y = 5 and y = -1 if the lines are parallel, perpendicular, or neither

denis-greek [22]

Answer:

the lines are parallel

Step-by-step explanation:

you can tell they are parallel by graphing them

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4 years ago

For the polynomial –2m2n3 + 2m?n3 + 7n2 – 6m4 to be a binomial with a degree of 4 after it has been fully simplified, which must

andrew-mc [135]

Answer:

Step-by-step explanation:

Given the polynomial:

$-2m^2n^3 + 2m^{\boxed{x}}n^3 + 7n^2 - 6m^4$

where x is the missing exponent.

We desire our polynomial to be a binomial (have two terms) after simplification.

We observe that the first and second term are positive and negative of almost the same term.

Therefore, we rewrite the polynomial in such a way that the first and second term cancels out.

This is:

$-2m^2n^3 + 2m^{\boxed{2}}n^3 + 7n^2 - 6m^4\\$Simplified, we have:\\\\=7n^2 - 6m^4$

Therefore, the missing exponent on the m in the second term is 2.

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3 years ago

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Square root x-2=7 answers are a)51 b)27 c)23 I'm confused on how to do this ?

IgorC [24]

It's A because to remove the radical you do x-2 squared and 7 squared which you will get x-2=49 and then subtract -2 from 49 which gives you 51

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3 years ago

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