4.95 is how much he paid so you cannot go past that number
he bought 7 books at .35 cents, he spent 2.45 on that [ 7 x 0.35 ]
he bought 5 books at .50 cents , he spent 2.50 on that [ 5 x .50 ]
2.45 plus 2.50 = 4.95
7 plus 5 = 12
He bought 12 total books
Answer:
y=1/6 x
Step-by-step explanation:
It is 51,600%. Hope it helps
If you want to build a polynomial with roots
you just need to multiply factors like ![(x-x_i),\ \forall i=1\ldots n](https://tex.z-dn.net/?f=%28x-x_i%29%2C%5C%20%5Cforall%20i%3D1%5Cldots%20n)
So, your polynomial is
![p(x)=(x-5)(x+5)=x^2-25](https://tex.z-dn.net/?f=p%28x%29%3D%28x-5%29%28x%2B5%29%3Dx%5E2-25)
Step-by-step explanation:
The third option: 5x(x^2+3)(4x-5)
because FOIL first, inner, outter, last
The two parentheses become (4x^3-5x^2+12x)
then 5x outside multiplys that whole parentheses. To get your correct expression