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Maru [420]
3 years ago
6

Elena's math class had 25 students yesterday. she miscounted the class total and recorded it as 20 students. What is Elena's per

cent error ?
Mathematics
1 answer:
adelina 88 [10]3 years ago
8 0
Elena had a 5% error
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Answer:

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Step-by-step explanation:

Note the equal sign, what you do to one side, you do to the other. Isolate the variable, x. Do the opposite of PEMDAS.

PEMDAS is the order of operations, & =

Parenthesis

Exponent (& Roots)

Multiplication

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First, subtract 13 & 8x from both sides:

2x (-8x) + 13 (-13) = 8x (-8x) - 41 (-13)

2x - 8x = -41 - 13

Simplify. Combine like terms:

-6x = -54

Isolate the variable, x. Divide -6 from both sides:

(-6x)/-6 = (-54)/-6

x = (-54)/(-6)

x = 9

x = 9 is your answer.

~

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