Answer: 21 questions
Step-by-step explanation:
Turn it into a number sentence.
72% of x amount of questions is 15
0.72(x) = 15. Divide both sides by 0.72
x= 20.83333 round to nearest whole number
x= 21 questions
Answer:

Step-by-step explanation:
x ≤ 0 - the region below the line x = 0 (x axis)
x ≥ 0 - the region above the line x = 0 (x axis)
y ≤ 0 - the region on the left of the line y = 0 (y axis)
y ≥ 0 - the region on the right side of the line y = 0 (y axis)
all region with lines (axes)
We have the region below the x axis (x = 0).