Answer:
$50 per hour
Step-by-step explanation:
$10+$40=$50
A) 21 (21 - 1 = 20)
B) 75 (8 x 15 = 120; 120 - 3 - 10 - 8 - 3 - 10 - 1 - 10 = 75)
C) 6 (any value close to the mean)
I’ll use m for marbles & g for go karts. I’m hoping someone has a prettier way to do this, and I can learn with you.
3m + 2g = 25.75
4m + 3g = 35.75
We’ll take the top equation and solve for g in terms of m.
2g = -3m + 25.75
g = (-3m + 25.75)/2
Then substitute that mess, um, expression, I to the second equation to solve for m.
4m + 3[(-3m + 25.75)/2] = 35.75
4m + (-9m + 77.25)/2 = 35.75
4m -4.5m + 38.625 = 35.75
-0.5m = -2.875
0.5m = 2.875
m = 5.75
Now we pick an equation, plug in the numerical value of m, and solve for a numerical value of g
3m + 2g = 25.75
3(5.75) + 2g = 25.75
17.25 + 2g = 25.75
2g = 8.50
g = 4.25
Checking the math:
4m + 3g = 35.75
4(5.75) + 3(4.25) = 23 + 12.75 = 35.75
Mini marbles golf cost $4.25, slow go karts cost $5.75.
