gwenspooner85

If 0 text messages are sent, the total cost, is:

35+0.08(0)=35.

If 10 text messages are sent, the total cost, is:

35+0.08(10)=35+0.8=35.80

If 40 text messages are sent, the total cost, is:

35+0.08(40)=35+3.2=38.20

If 70 text messages are sent, the total cost, is:

35+0.08(70)=35+5.6=40.60.

Yeah...what graph?

104% is aso 104/100. We can form an equation.

\(\frac{104}{100}x=598\\ 104x=59800\\ x=575\)

Therefore x=575.

Let's take this term by term. We have 3x^4+2x-1 and 5x^2-6x-1. h(x) must have -3x^4 because all x^4 terms cancelled in the sum, 5x^2 because there was no x^2 term before so this must have been added, and -8x because 2x-8x=-6x.. So h(x) is -3x^4+5x^2-8x.

We can form an equation for the relationship between vegetable pizzas and pepperoni pizzas.

v=5p+3.

The total number of pizzas is v+p=51. Substitue 5p+3 for v and solve for p.

(5p+3)+p=51

6p+3=51

6p=48

p=8 pepperoni pizzas.

Ah...I see, thank you. I think I prefer this way. But instead of using numbers, using variables would provide an overall proof for any angle degrees values.

I don't quite understand why Cphill chose to rearrange the equation like that though. 

Have you tried using the AoPS message board yet though? :)

I mean some people just want a direct solution so...

This gives an even less reason for us to answer your questions.