1. tim is choosing between two cell phone plans that offer the
same amount of free minutes. cingular's plan charges $39.99
per month with additional minutes costing $0.45. verizon's
plan costs $44.99 with additional minutes at $0.40. write an
equation that could be used in order to find the additional
minutes a, that it will take for the two plans to cost the same.

39.99 + x(0.45) = 44.99 + x(0.40)

Where x is the number of minutes

Step-by-step explanation:

To make both plans equal, it is important to state that their additional minute would be the same.

Now, let us choose the value x as the additional minute on both plans.

The total cost of the additional minute on the cingular plan would be x × 0.45 = 0.45x

The total cost of the additional minute on the Verizon plan would be x × 0.4 = 0.40x

Now we calculate the overall cost on the cingular network to be $(39.99 + x(0.45)) . The overall cost on the Verizon network would be $( 44.99 + x(0.40)).

Since we now want a situation in which both plans are equal monetarily, we then equate the value of the 2 plans.

Hence,

39.99 + 0.45x = 44.99 + 0.40x

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

step-by-step explanation:

let

we know that

the y-intercept is the y-coordinate of the point when the value of x is equal to zero

so

the y-coordinate of the point a is the y-intercept

the answer part a) is

the value of y-intercept is

part b) find the slope m

we know that

the value of the slope is equal to

substitute the values

therefore

the answer part b) is

the value of the slope is equal to

the general answer is

the slope is

the value of y-intercept is