Roots = 2, 4
A.O.S = 3.
The zeroes are where the parabola will meet the x-axis. The axis of symmetry pretty much just splits your parabola equally in half.
1+x=3
x=2
x-4=-2
x=2
1+x=-2
x=-3
x+3=5
x=2
x-5=3
x=8
So 1+x=3,x-4=-2,x+3=5 are equivalent
Answer:
Let p be the number of phones sold and a be the number of accessory sold.
9p + 4a = 253
a - p = 8
Step-by-step explanation:
He gets $9 for every phone and $4 for every accessory, so you can write this as
9p + 4a
Then he made a total of $253 do the new equation is
9p + 4a = 253
We are also given that he sold 8 more accessories than phones. So we can write this as
a = p + 8
rearrange that so that all the variables are to one side.
a - p = 8
Now you have the two equations needed to solve the for the variable. The question didn't ask me to solve for the variable so I'll leave it here.
Answer:
x=-3 and the graph is A since x>-3
We are looking for k in the equation
(x+4)(x+k/4) = x^2+7x+k
The left hand side expands to:
x^2+(4+k/4)x+k = x^2+7x+k
Comparing coefficients for the linear terms, we have the equation
(4+k/4)=7
Solving for k:
16+k=28
k=12
Thus the number to be subtracted is 15-k=15-12=3
