Answer:
A is 16, B just draw a line down from the inside square to make a rectangle, C. just multiply all the numbers around the square
Step-by-step explanation:
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Neither one of those answer choices! It’s 12 3/25
Answer:

Step-by-step explanation:

Collect like terms


Answer:
Grace should use her phone for 58 minutes to maintain an average of 55 minutes.
Step-by-step explanation:
Usage of first month = 43 minutes
Second month = 62 minutes
Third Minutes = 57 minutes
Let, the usage of fourth month = k minutes
Mean of the data = 5 minutes
Now, Average of a Data = 
⇒
or, 55 x 4 = 162 + k
⇒ 220 - 162 = k
or, k = 58 minutes
So, Grace should use her phone for 58 minutes to maintain an average of 55 minutes.