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Jet001 [13]
3 years ago
10

Kim scored an average grade of 82 on her first four English quizzes. She wants to raise her average to a grade of 84. What is th

e lowest grade that she can receive on her fifth English quiz in order to achieve her goal?
1. 82
2. 84
3. 88
4. 90
5.92

Greatly appreciated!
Mathematics
2 answers:
Archy [21]3 years ago
7 0

Answer:

88

Step-by-step explanation:

Genrish500 [490]3 years ago
7 0
The answer is 92

Steps:
82 x 4 = 328
328 + 92 = 420
420/5 = 84

84 is the new average with the added test score.
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Solution:

Use algebraic identity: a^m\times a^n=a^{m+n}

For example: x^2\times x=x^{2+1}=x^3

Given expression (x^2-5x+2) and (3x^2+2x+3).

To multiply these equations.

(x^2-5x+2)\times(3x^2+2x+3)

             =x^2(3x^2+2x+3)-5x(3x^2+2x+3)+2(3x^2+2x+3)

             =(3x^4+2x^3+3x^2)+(-15x^3-10x^2-15x)+(6x^2+4x+6)

             =3x^4+2x^3+3x^2-15x^3-10x^2-15x+6x^2+4x+6

Combine like terms together.

             =3x^4+(2x^3-15x^3)+(3x^2-10x^2+6x^2)-15x+4x+6

             =3x^4-13x^3-x^2-11x+6

(x^2-5x+2)\times(3x^2+2x+3)=3x^4-13x^3-x^2-11x+6

Hence the answer is 3x^4-13x^3-x^2-11x+6.

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Answer:

I do believe the answer is C

Step-by-step explanation:

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