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xz_007 [3.2K]
3 years ago
12

Equation for, One half the sum of 8 and x

Mathematics
2 answers:
Ahat [919]3 years ago
6 0

Answer:

\frac{8 + x}{2}

Step-by-step explanation:

First, we have to write 8 + x, but since it's half of that we write it as a fraction with a 2 on the bottom to halve it.

dmitriy555 [2]3 years ago
4 0

Answer:

(8+x)/2

Step-by-step explanation:

one half = /2

sum = 8+x

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The answer to this equation is x=5.

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23 girls have a mean height of 153cm
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Mean height of 159

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Add 153 and 165, then divide by 2 to find the average of 159.

6 0
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Good science requires that you record your observations accurately.<br><br><br><br> TrueFalse
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True.

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2 years ago
All three please 10 points
GaryK [48]

Answer:

A) x = 3 or -1

B) x = -7

C)x = -7

Step-by-step explanation:

A) x² + 2x + 1 = 2x² - 2

Rearranging, we have;

2x² - x² - 2x - 2 - 1 = 0

x² - 2x - 3 = 0

Using quadratic formula, we have;

x = [-(-2) ± √((-2)² - 4(1 × -3))]/(2 × 1)

x = (2 ± √16)/2

x = (2 + 4)/2 or (2 - 4)/2

x = 6/2 or -2/2

x = 3 or -1

B) ((x + 2)/3) - 2/15 = (x - 2)/5

Multiply through by 15 to get;

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

5x + 10 - 2 = 3x - 6

5x - 3x = -6 - 10 + 2

2x = -14

x = -14/2

x = -7

C) log(2x + 3) = 2log x

From log derivations, 2 log x is same as log x²

Thus;

log(2x + 3) = logx²

Log will cancel out to give;

2x + 3 = x²

x² - 2x - 3 = 0

Using quadratic formula, we have;

x = [-(-2) ± √((-2)² - 4(1 × -3))]/(2 × 1)

x = (2 ± √16)/2

x = (2 + 4)/2 or (2 - 4)/2

x = 6/2 or -2/2

x = 3 or -1

5 0
3 years ago
Create an expression without parentheses that is equivalent to 4(6x + x).
Vlad1618 [11]
A possible answer can be found using the distributive property:

4(6x + x) becomes 24x + 4x, which can then be simply died to 28x.

Either off these solutions will work, as they are both expressions equal to the original expression.

Hope this helps!
6 0
3 years ago
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