Answer:
x=4
Step-by-step explanation:
5x+3=23. 5x=20. x=4
Answer:
a) 216
b) 120
Step-by-step explanation:
a) 6×6×6 = 216
(6 options for each position)
b) 6C3 × 3! = 120
Answer:
21.25ft
Step-by-step explanation:
To solve for this, all you need to do is find a ratio proportional to the given. The given shows the following ratios:

All you need to do is solve for x. You can do this by first cross multiplying:

Move all terms not containing y to the right side of the equation.
y = -17