I'm guessing you have to simplify this?
You distribute 4 to whatever is in the parenthesis.

So
4•y=4y
4•6=24
And of course there's the 5y that stays the same.

You get 4y+24+5y
Which simplifies to 9y+24 because you can group the 4y and 5y together.

In the end, you get 9y+24.

4 0

3 years ago

tim is choosing between two cell phone plans that same amount of free minutes. Cingular plane charges 39.99 per month with addit

VMariaS [17]

Answer:

100 minutes

Step-by-step explanation:

Let

x ----> the number of minutes

y ----> the total cost of the plan

we know that

<em>Cingular Plan</em>

$y=0.45x+39.99$ -----> equation A

<em>Verizon Plan</em>

$y=0.40x+44.99$ -----> equation B

To find out how many additional minutes will it take for the two plans to cost the same

Solve the system of equations A and B

Solve by graphing

Remember that the solution is the intersection point both graphs

using a graphing tool

The solution is the point (100,84.99)

see the attached figure

therefore

For x=100 minutes

The cost for both plans is $84.99

3 0

3 years ago