Answer:
We would multiply the first equation by -3 to eliminate the x-term.
Step-by-step explanation:
Given the system of equations
y = x+2 Equation 1
3x+3y = 6 Equation 2
Multiply the Equation 1 by -3
-3y = -3(x+2) ⇒ -3y = -3x-6 ⇒ -3x+3y = 6
Thus, equation 1 becomes
-3x+3y = 6
Now, adding equation 2
-3x+3y = 6
+
3x+3y = 6
________
0x + 6y = 12
6y = 12
y = 2
Therefore, we would multiply the first equation by -3 to eliminate the x-term.
Answer:
75%
Step-by-step explanation:
$39= x-(0.25x)= 0.75x
A 25% discount takes off 0.25 of the price.
x= original price
To find the original we use something like the above equation
Answer:
C. {3,5,7,9}
Step-by-step explanation:
The domain of a function is the set of inputs, or x-values, of the function.
The x-values listed in this function are 3, 5, 7 and 9; this means the domain is {3, 5, 7, 9}.