Answer:
Step-by-step explanation:
3x=-15
x=-5
Answer:

Step-by-step explanation:

♨Rage♨
Answer:
The answer for this equation would be 1
Step-by-step explanation:
Hope I helped!
Answer:
a) 120°
Step-by-step explanation:
i think this is the right answer
Answer:
B. 61%
Step-by-step explanation:
When we have the standard deviation of a sample, we use the t-distribution.
The width of an interval is related to the margin of error, which is given by the following equation:
M = T*s
In which T is related to the confidence level(and the sample size) and s is the standard deviation of the sample. Higher confidence levels have higher values of T.
A higher margin of error means that the interval is wider. To have a higher margin of error, we desire a higher value of T, which is achieved with a higher confidence level.
So the correct answer is:
B. 61%