Given that the monthly cell phone bill is determined by a fixed monthly fee of $35 for 300 anytime minutes and $.40 for each additional minute used.

Dependent variables can be the result of more than one independent variable.

Consider your phone bill as presented above. Aside from being charged for minutes over 300, you are charged $1.25 for each directory assistance call and $.75 per minute for long distance roaming calls. You also have to contribute at least $1.50 to the federally required Universal Service Fund per month and this value may vary on your phone bill but is not an independent variable.

To write an equation expressing your monthly cost using the below independent and dependent variables.

Let x = additional minutes used, then the cost for additional minutes used is given by 0.4x.

Let d = number of directory assistance calls made, then the cost for directory assisitance is given by 1.25d.

Let r = number of long distance minutes used, then the cost for long distance minutes is given by 0.75r.

Let u = USF monthly charge.

Let y = total monthly bill, therefore the total monthly bill is given by

y = 0.4x + 1.25d + 0.75r + u

4 0

3 years ago

PLEASE HELP! A) 2.9 B) 9.2 C) 3.3 D) 5

Eva8 [605]

Answer:

9.2 =x

Step-by-step explanation:

Since this is a right triangle, we can use trig functions

tan theta = opp/ adj

tan 57 = x/6

6 tan 57 = x

9.239189783 = x

9.2 =x

5 0

4 years ago

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