Answer:



Step-by-step explanation:
Given



Solving (a): n
To solve for n;
We make use of

Substitute values for XY and XZ



Divide through by -6

Solving (b) XY

Substitute 3 for n



Solving (c): XZ


Answer:
C
Step-by-step explanation:
because it is asking to find the number of classes held during the weekday zumba class.
weekday class = 30 minutes
Saturday= 45 minutes
total = 165
They would be identical so it would be 114
Edit to reflect comments:
3^-1=1/3
4^-1=1/4
Flip the fraction over basically i.e. 4/1---->1/4
Answer:
1) 8.5x10^8
2) 5.3x10^-3
3) 9.95x10^12
Step-by-step explanation:
Since they have the same exponents, you just add or subtract and leave the rest the same.
1) 8.5x10^8
2) 5.3x10^-3
3) 9.95x10^12