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olga_2 [115]
2 years ago
7

AH SOMEONE HELP ILL GIVE BRAINLIEST ​

Mathematics
2 answers:
chubhunter [2.5K]2 years ago
7 0

Answer:

a

Step-by-step explanation:

because im learning it too

Sedbober [7]2 years ago
6 0

Answer:

a

Step-by-step explanation:

I passed that assignment

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Will mark brainliest and 15 points
insens350 [35]

Answer:

Step-by-step explanation:

x - 3y  -15

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The mean height of 10 girls is 154cm. The mean height of 8 boys is 162cm. What is the mean height of the class?
olganol [36]

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158cm

Step-by-step explanation:

154+162=316

316/2=158

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4 is in the hundredths 1 is in thousandths 9 is in the 10 thousandths

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What is x. Please show *all* the steps.
Zolol [24]

The equation 5/2 - x + x - 5/x + 2 + 3x + 8/x^2 - 4 = 0 is a quadratic equation

The value of x is 8 or 1

<h3>How to determine the value of x?</h3>

The equation is given as:

5/2 - x + x - 5/x + 2 + 3x + 8/x^2 - 4 = 0

Rewrite as:

-5/x - 2 + x - 5/x + 2 + 3x + 8/x^2 - 4 = 0

Take the  LCM

[-5(x + 2) + (x -5)(x- 2)]\[x^2 - 4 + [3x + 8]/[x^2 - 4] = 0

Expand

[-5x - 10 + x^2 - 7x + 10]/[x^2 - 4] + [3x + 8]/[x^2 - 4] = 0

Evaluate the like terms

[x^2 - 12x]/[x^2 - 4] + [3x + 8]/[x^2 - 4 = 0

Multiply through by x^2 - 4

x^2 - 12x+ 3x + 8 = 0

Evaluate the like terms

x^2 -9x + 8 = 0

Expand

x^2 -x - 8x + 8 = 0

Factorize

x(x -1) - 8(x - 1) = 0

Factor out x - 1

(x -8)(x - 1) = 0

Solve for x

x = 8 or x = 1

Hence, the value of x is 8 or 1

Read more about equations at:

brainly.com/question/2972832

8 0
1 year ago
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