Step-by-step explanation:
he get one hour=15$
he get bonus end of the month=85$
- total 685$- bonus 85$=600$
- 600$÷one hour 15$= 40 hours
Answer: The second one is x^6.
Step-by-step explanation:
Idk the first one. Hope I helped!
Answer:

Step-by-step explanation:
Given
y jointly varies to x and z^2
Required
Find the equation
We start by writing out the variation;

Write as equation

Substitute values of x,y and z



Divide both sides by 7




Substitute k in 

Answer:
9
Step-by-step explanation:
used a calculator
16.826 - 0.001
17.825 - 1.
16.82 + 0.005