Abigail is studying for the school spelling bee. she already knows 154 words from the vocabulary list. each day, she learns 31 additional words from the vocabulary list. which equation can be used to determine the total number of words abigail knows from the vocabulary list, y, over x days?
a. y = 31(x + 154)
b. y = 154x + 31
c. y = 31x + 154
d. y = 31x - 154

The correct answer is option C. y = 31x + 154.

Step-by-step explanation:

Since x represents the days and she learns 31 words per day you would need to multiply 31 and the number of days (x).

This would look like 31x.

We also know she already knew 154 from the beginning which means we just have to add 154.

This leaves us with the equation y=31x + 154.

Hope this helps!

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation: