Answer:
x=-3
y=2
Step-by-step explanation:
To solve this problem you can use the elimination method:
- Multiply the second equation by -6:

- Add both equations:

- Substitute the value of x into one of the original equations and solve for y:

15
27
42
72
Plug in the number for “n” then solve: minus 1 times 3 then plus 15
Answer:
D. Both distributions are skewed left, so the interquartile range is the best measure to compare variability.
Step-by-step explanation:
Plotting the data roughly shows that the data is skewed to the left. In other words, data is skewed negatively and that the long tail will be on the negative side of the peak.
In such a scenario, interquartile range is normally the best measure to compare variations of data.
Therefore, the last option is the best for the data provided.
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Answer:
The equivalent expression is 
Step-by-step explanation:
Given: 
We need to simplify the expression. We will distribute radical with each term inside the parentheses.

Distribute the radical



Now we will simplify the negative exponent.

Hence, The equivalent expression is 
(x+4)(x+6)=0
x = -4, x=-6
The answer is C.