Question

This equation shows how the money Rockport Middle School spends on workbooks is related to the total number of workbooks they buy. d = 75.80 + 0.1t. The variable t represents the number of workbooks bought by the school, and the variable d represents the total cost of those workbooks. At most how many workbooks can Rockport Middle School buy if it has $75.90 to spend?

a. 1
b. 5
c. 9
d. 10

Answer 1

Rockport Middle School can buy at most 1 workbook for $75.90, according to the given equation d = 75.80 + 0.1t.

Step-by-step explanation:

The given equation d = 75.80 + 0.1t represents the total cost (d) of workbooks when (t) a number of workbooks are bought. Rockport Middle School has $75.90 to spend on workbooks. To calculate the maximum number of workbooks they can buy, we can substitute d with $75.90 and solve for t.

$75.90 = $75.80 + $0.10 × t

Subtracting $75.80 from both sides gives us:

$0.10 = $0.10 × t

Dividing both sides by $0.10 gives us:

t = 1

Therefore, Rockport Middle School can buy at most 1 workbook for $75.90.