Answer:
Step-by-step explanation: If 1 minutes of talk = 30 and texting = 30
and each additional minute of talk = 0.50
then the bill would be (for C = total cost)
C = 20+30+(0.45 • x)
OR
C = 50 + 0.45x
7x - 3(-2) = 23
7x - - 6 = 23 (two minuses make a plus)
so it’s gonna be 7x + 6 = 23
Now you have isolate you x, so move everything else to the other side, but remember to change your sign when transferring to the other side
7x = 23 - 6
7x = 17
To isolate x in this multiple, you divide by 7 (because the inverse of multiplication is division)
x = 17/7
(2,0)
(-6,0)
I just inserted the equation into a graphing calculator. Kinda lazy tonight :/
Answer:
$9.07 per pound
Step-by-step explanation:
Take the total cost and divide by the number of pounds
$11.25/ 1.24
$9.072580645 per pound
Rounding to the nearest cent
$9.07 per pound
Answer:
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