A basic cellular package costs $20 per month for 60 minutes of calling, with an additional charge of $0.50/min beyond that time. The cost formula would be C = 20 + 0.50(x − 60), where C is the cost measured in dollars and x is the number of calling minutes used. If you cannot have a bill greater than $90, what is the maximum number of calling minutes you can use?

hi,

3. 12.15, you are correct.

4.2.01, your first digit is correct,

hope this !

im here

step-by-step explanation:

find the magnitude of the trig term  

csc

(

x

)

−

1

by taking the absolute value of the coefficient.

1

find the lower bound of the range.

tap for more

y

=

−

2

find the upper bound of the range.

tap for more

y

=

0

the range is  

y

≤

−

2

or  

y

≥

0

.

(

−

∞

,

−

2

]

∪

[

0

,

∞

)

{

y

|

y

≤

−

2

,

y

≥

0

}

step-by-step explanation:

answer: 0

step-by-step explanation: the positive, like 5, + its opposite, like -5 would be 0

5+(-5)=0, or 5-5=0