Answer:
<em>-4 ≤ y ≤ 7</em>
Step-by-step explanation:
<u>Inequalities</u>
Solve the system of inequalities:
4y - 7 ≤ 3y [1]
3y ≤ 5y + 8 [2]
A.
Subtracting 3y to [1]:
y - 7 ≤ 0
Adding 7:
y ≤ 7
Subtracting 5y to [2]:
-2y ≤ 8
Dividing by -2 (and flipping the sign):
y ≥ -4
The solution of the system is all the values of y greater or equal to -4 and less or equal to 7.
B.
The solution can be expressed as:
-4 ≤ y ≤ 7
Answer:
D. 37.22%
Step-by-step explanation:
One of my favorite probability z-table websites calculates the fraction as 0.3722 = 37.22%.
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Your graphing calculator or spreadsheet can probably do the same for you.