Question 3. You divide 5 1/4 by 3/4 then multiply that by 20.
The answer is 140
12 groups in a 1:1 ratio of boys:girls. there are only 12 girls so one in each group + 1 boy per group gives you 12 groups. with a remainder of 6 boys
x*x=152
x2=152
Take square root.
x=±√152
x=√238
or
x=−√238
Z = -72
Ask me in the comments section if you want the equation solved step-by-step.
Hope this helped!
Slope = (2 + 1) / (-5 - 10) = -3/15 = - 1/5
Equation
y - 2 = -1/5 (x + 5)
y - 2 = -1/5 x - 1
y = -1/5 x + 1
Answer
y = -1/5 x + 1
