Question

Your teacher will grade your response to ensure that you receive proper credit for your answer. The cost of a telephone call is $0.75 - 0.25 × the number of minutes. Write an algebraic expression that models the cost of a telephone call that lasts 1 minute.

a) 0.50
b) 0.60
c) 0.70
d) 0.80

Answer 1

The cost of a one-minute telephone call, based on the algebraic expression provided, is $0.50.

Step-by-step explanation:

The algebraic expression that models the cost of a telephone call that lasts 1 minute can be found by substituting the value of 1 into the given expression. The cost of a telephone call that lasts 1 minute can be calculated using the given algebraic expression: $0.75 - 0.25 × the number of minutes. Plugging in 1 for the number of minutes, the expression becomes $0.75 - 0.25 × 1.

Now, performing the multiplication first (as per order of operations), we have:

$0.75 - $0.25 = $0.50.

Therefore, the cost of a one-minute telephone call is $0.50, which corresponds to choice a) $0.50.