If xy=0 then assume taht x and/or y=0
remember differnce of 2 perfect squares
a^2-b^2=(a-b)(a+b)
factor
6x^2-24=0
6(x^2-4)=0
6(x^2-2^2)=0
6(x-2)(x+2)=0
set to zero
x-2=0
x=2
x+2=0
x=-2
x=2 and -2
A is answer
40.21/12.5
We would do this because the problem asks for unit rate
And and we need to find out the cost for one square foot
40.21/12.5 = 3.2168
We need to round this ANSWER and round it or else it will be incorrect
The answer would round to 3.22
Therefore, the answer is $3.22 per square foot
I believe the answer to this question is A
Answer:
an=9+(n−1)3, an=3n+6
Step-by-step explanation:
Arithmetic Sequence:
d=3
This is the formula of an arithmetic sequence.
an=a1+d(n−1)
Step 1: Substitute in the values of
a1=9 and d=3.
an=9+(3)(n−1)
Step 2: Simplify each term.
an=9+3n−3
Step 3: Subtract 3 from 9.
an=3n+6
