Andrew was calling family in Italy. The formula C = 0.23m + 0.89, where C represents cost, in dollars, and m represents
minutes, can be used to determine the cost of a phone call to
Italy.
What if Andrew talked for 1 hours.
How much would his phone call
cost?

This works out to $14.69.

Step-by-step explanation:

C = 0.23m +  0.89 is measured in dollars.  $0.89 is the up-front cost, which happens to be the y-intercept.  $0.23/min is the unit rate:  cost per minute.

Recalling that 1 hour = 60 minutes,

write C(60 min) = $0.89 + ($0.23/min)(60 min)

This works out to $14.69.

rounding to the nearest thousandth would be 452,000

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.