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natali 33 [55]
3 years ago
13

3. Tmobile charges 100 dollars for the initial phone line and then 20 dollars for every phone line afterwards.

Mathematics
1 answer:
salantis [7]3 years ago
5 0
A)your equation for t-mobile would be
y=20x+100

Topar equation
y=30x

B) you’d set the two equation equal to each other

20x+100=30x

giving you the answer x=10

C) when x>13

D) when x<14

i’m a bit iffy on the last two but that’s the conclusion i came to

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