Answer:
1st option
Step-by-step explanation:
For any input of value <em>x</em>, the output <em>y </em>is always 2. The equation would then be y = 2, which would have 0 slope.
I'm pretty sure the answer would be
1/5 or .2
(that's the same answer in decimal and fraction form)
-3/5 parallel lines have the same slope
Let x = amount of 65% antifreeze
Let y = amount of 90% antifreeze
EQUATION 1: x + y = 50 (total of 50 gallons mixed)
EQUATION 2: .65x + .90y = .70(x + y)
Simplify and solve the system of equations
Multiply second equation by 100 on both sides to remove the decimals
65x + 90y = 70(x + y)
Combine like terms
65x + 90y = 70x + 70y
65x -70x+ 90y-70y = 0
-5x + 20y = 0
Now we have the following system of equations:
x + y = 50
-5x + 20y = 0
Multiply the first equation by 5 to get opposite coefficients for x;
add the equations to eliminate x
5x + 5y = 250
-5x + 20y = 0
------------------------------
25y = 250
Solve for y
y = 10
Since the total mixed gallons is 50,
x = 50 - 10 = 40
So we need 40 gallons of the 65% antifreeze and 10 gallons of the 90% antifreeze
Answer:
Step-by-step explanation:
o;f;or;ijq3ro;ijq3rioq .3itj . i q3nfnr r rkler3wrgw t wtwl4t
