If I didn’t make a mistake it would make him 54
Hope this helps
Answer:
No
Step-by-step explanation:
28*24=672. So, this is not even close to 800 and so isn’t reasonable.
Answer:
B (2,3)
Step-by-step explanation:
Answer:
25.2
Step-by-step explanation:
I'll assume you wrote:
So when x = 4:
≅ 
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
