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:
I dont know im so sorry
Step-by-step explanation:
Answer:
About 1.5
Step-by-step explanation:
We can round 4/5 to 1.
We can round 3/8 to 4/8 = 1/2.
So our estimate is
4/5 + 3/8 =
about 1 + 1/2 = 1.5
(Shh... let's check using the calculator... it's 1.2. We were pretty close!)
3x² - 4 → A
(f + g)(x) = f(x) + g(x) = 2x² + 3 + x² - 7 = 3x² - 4
