Answer:
30 +0.45(m -500) . . . . for m > 500
Step-by-step explanation:
If talk time is "m" minutes, then the number of "additional minutes" is ...
m -500
The cost of those is $0.45 each, so (in dollars), the charge for additional minutes is ...
0.45(m -500)
The charge of $30 applies regardless of the number of minutes, so is added to the minutes charge. The total cost of a bill for talking more than 500 minutes is ...
30 +0.45(m -500)
_____
The cost for talking 500 minutes or less is simply 30.
Answer:
Step-by-step explanation:
1) Use the grid method to expand the two brackets
2) Collect like terms
3) Form the statement!
(See attached image)
Answer:
-40x+20
Step-by-step explanation:
10 times -4x=-40x
10x2=20
Answer:
4x - 27
Step-by-step explanation:
x + 8 + 3x + 10 - 45
= 4x - 27
Round it to 2. anything above 5 rounds to 10, 4 and below round to 0
