Answer:
<span>A. The set of all ordered pairs (x,y) that are solutions to the equation
</span><span>C. The cost of fixing a computer in x amount of time.</span><span>
</span>
Answer:
Step-by-step explanation:
4x-6y=21
divide by 21

Answer:
a no solution
b is all real numbers
c x=12
Step-by-step explanation:
a has no values of x that make it true
b any value of x makes it true
c simplify both sides of the equation then isolate x
X^2 - 8x-9=0
D = b^2- 4*a*c = 64- 4* (-9) = 64+36=100 =10^2
X1 = (8-10)/2 = -1
X2= (8+10)/2= 9
The complete square will be
= 3
Step-by-step explanation:
Given,

or,
[ by eliminating 2 from both the sides]
To make it square

or,
[ 
or,
= 9-6
or,
= 3
Hence the correct option is B