Step-by-step explanation:
To multiply a number by 100, move all of its digits two places to the left. Multiplying a whole number by 100 is the same as adding two zero digits to the end of the number. To multiply a number by 100, all digits of this number move two place value columns to the left
-18.5 = -2 (7f + 7.5)
-18.5 = -2×7f + (-2)×7.5
-18.5 = -14f + (-15)
-18.5 = -14f - 15
add 15 to both sides
-18.5 +15 = -14f - 15 + 15
-3.5 = -14f
f = -3.5/-14 = 0.25
Answer:
24 minutes
Step-by-step explanation:
25- 19.24= $5.76 used so....
$5.76/ 0.24cents = 24 minutes
