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3 years ago

Sheryl's mean average on eight exams is 83.750. Find the sum of her scores.

1 answer:

6 0

The answer is B. 670

The mean average (X) is sum (s) of the values divided by the number of values n:
X = s / n

X = 83.750
n = 8
s = ?

s = X * n
s = 83.750 * 8 = 670

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Step-by-step explanation:

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4 years ago

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Answer:

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Find the simplified product b-5/2b x b^2+3b/b-5

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Answer:

The product $\frac{b-5}{2b}\times\frac{b^2+3b}{b-5}=\frac{b+3}{2}$

Step-by-step explanation:

Given expression $\frac{b-5}{2b}$ and $\frac{b^2+3b}{b-5}$

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Consider the given expression $\frac{b-5}{2b}\times\frac{b^2+3b}{b-5}$

Multiply fractions, we have,

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$=\frac{\left(b-5\right)\left(b^2+3b\right)}{2b\left(b-5\right)}$

Cancel common factor ( b - 5 )

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Apply exponent rule,

$\:a^{b+c}=a^ba^c$

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Cancel common factor b , we have,

$=\frac{b+3}{2}$

Thus, the product $\frac{b-5}{2b}\times\frac{b^2+3b}{b-5}=\frac{b+3}{2}$

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4 years ago

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Which fraction is equivalent to 0.3636...

NNADVOKAT [17]

A = 0.363636 ...
a = 0.(36)
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3 years ago

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