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Answer:
This is the same as and it is also equivalent to
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Explanation:
n is some placeholder for a number
one fourth of that number is which is the same as
or
since 1/4 = 0.25
From here, we subtract off 2 to get as one possible final answer.
Answer:
Step 4
Step-by-step explanation:
Given: Steps used by Shelly to evaluate the expression
To find: step that includes Shelly's mistake
Solution:
According to PEMDAS,
P denotes Parentheses
E denotes Exponents
M denotes Multiplication
D denotes Division
A denotes Addition
S denotes subtraction
Step 3 is and step 4 is
In step 4, first subtraction operation has been applied before the division operation.
There is a mistake in step 4 as according to PEMDAS, first -20 should be divided by 5 then 1 should be subtracted from the resultant number.