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PolarNik [594]
3 years ago
15

Math Help Please

Mathematics
1 answer:
Romashka [77]3 years ago
5 0
1) B
2) C
3) D
4) A
5) A
6) D (Not completely sure, check in case w/ another person)
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What is an algebraic expression for ​"21 more than n​"?
stealth61 [152]

Answer:

Step-by-step explanation:

n+21

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3 years ago
-9x5 + 36x4 + 189x3 in factored form
Lera25 [3.4K]

Answer:

Step-by-step explanation:

-9x^3(x^2 - 4x - 21) =

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4 0
3 years ago
In expansion of (2x+1)(x^2+px+4), the coefficient of x is twice the coefficient of x^2.
Brilliant_brown [7]

You're probably supposed to find the value of p and not x, which is impossible to do.

Expanding gives

(2x+1)(x^2+px+4)=2x^3+(1+2p)x^2+(8+p)x+4

We're told that

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\boxed{p=2}

7 0
3 years ago
Please help explain good luck
Tcecarenko [31]

Answer:

27

Step-by-step explanation:

Remember to follow PEMDAS. Note that, when multiplying or dividing:

1) one positive and one negative = negative number

2) two positive = positive number

3) two negative = positive number

(-7)(-5) = -7 * -5 = 35

+(-8) = +1 * -8 = -8

Subtract:

35 - 8 = 27

27 is your answer.

~

8 0
3 years ago
Read 2 more answers
What is the percent decrease when the balance in a bank account goes from $300 to $60?
Rzqust [24]
80% decrease. because 1% of 300 is 3 which you multiply 3*20 and which means 20 percent equals $60 the leftover percent is the decrease
5 0
3 years ago
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