Answer:
(x+8)^2=63
Step-by-step explanation:
Given:
The function is:
It is given that -1 is a zero of the given function.
To find:
The other zeroes of the given function.
Solution:
If c is a zero of a polynomial P(x), then (x-c) is a factor of the polynomial.
It is given that -1 is a zero of the given function. So, is a factor of the given function.
We have,
Split the middle terms in such a way so that we get (x+1) as a factor.
Again splitting the middle term, we get
For zeroes, .
and and
and and
Therefore, the other two zeroes of the given function are and .
7.5a+3c=663
a+c=113
Write a literal equation for c using the second equation.
c=-a+113
Substitute the value of c into the first equation
7.5a+3(-a+113)= 663
7.5a-3a+339=663
4.5a+339=663
4.5a=324
a=72
Final answer: 72 adult tickets sold
Check by finding the value of c and plugging both values in
(72)+c=113
c=41
7.5(72)+3(41)
663
True
Think of it like fractions. If the total of Emily's class is 40% or $580, put it into fractions. You know the total of everything is 100% and her class raised 40%. So write it as a fraction, 40 over 100. Then, write another fraction with 580 on the top, equivalent to 40%. Then you must cross multiply and divide. So multiply 100 times 580 and divide the product by 40 to get the equivalent of 100%. Therefore, the answer would be $1450. Make sense? Maybe this picture will help.