Martina purchased a prepaid phone card for $ 15 . long distance calls cost 22 cents a minute using this card. martina used her card only once to make a long distance call. if the remaining credit on her card is $ 7.74 , how many minutes did her call last? minutes

33 minutes.

Step-by-step explanation:

We have been given that Martina purchased a prepaid phone card for $15 . Long distance calls cost 22 cents a minute using this card. Martina used her card only once to make a long distance call and the remaining credit on her card is $7.74.

Let us find the amount spent on the long spent call by subtracting $7.74 from $15.

Therefore, Martina spent $7.26 on long distance call.

As each minute of long distance call costs 22 cents ($0.22), so to find the number of minutes of Martina's call we will divide 7.26 by 0.22.

Therefore, Martina's long distance call last for 33 minutes.

536

step-by-step explanation:

c. y = 1/4 x + 5

step-by-step explanation:

first, put the equation of the line on the graph into slope-intercept form

(y = mx + b):   y = -4x + 8

second, a perpendicular line has to have "an opposite/reciprocal slope" to the original slope. so, find the "m" value in your original equation (it's -4, right? )

original slope: m = -4   perpendicular slope: change the sign to its opposite and find the reciprocal ("flip" the number)

new slope is now positive (b/c the original slope was negative 4), and it's 1/4 (not the original slope of 4 or 4/1)