Answer:
x = -7
Step-by-step explanation:
f(x) = -2x + 9
f(x) = 23
therefore, f(x) =
-2x + 9 = 23
-2x = 23 - 9
-2x = 14
-x = 14 ÷ 2
-x = 7
x = -7
Answer:10
Step-by-step explanation:
1. It is the subset of a group - Group sample.
2. It equally favors all members of a group sample
- Random sample.
3. It collects data on members of a group - Survey.
4. It does not equally favor all members of a group - Biased sample.
5. It includes all members of a group
- Population.
6. It analyzes data collected from a group - Mean.
I have matched all concepts in accordance with statistical use, hope it helps.
You divide 2220 by 555 and you get 4 hours.
solve simultaneously
Step-by-step explanation:
make one of the equations x subject of the formula and the other equation y subject of the formula
y=8+2/5x....1
x=-5/3 + 2/3y.....2
substitute equation 1 into equation 2
x=5
y=10