**Answer:**

And the 96% confidence is given by (110.06; 117.34)

**Step-by-step explanation:**

**Information given**

represent the sample mean

population mean (variable of interest)

s=9.1 represent the sample standard deviation

n=29 represent the sample size

**Confidence interval**

The confidence interval for the mean is given by the following formula:

(1)

The degrees of freedom are given by:

The Confidence is 0.96 or 96%, the significance is and , and the critical value would be

Replacing the info we got:

And the 96% confidence is given by (110.06; 117.34)

Answer: x = 3, y = 3.

Step-by-step explanation:

The decision on a photo

**Answer:**

80

**Step-by-step explanation:**

An isosceles has 2 angles that are the same so 50+50 is 100 so we have 80 degrees left to make a full triangle because all angles will always add up to 180 so 50+50+80 is 180 degrees

**Answer:**

x=4

**Step-by-step explanation:**

3/4x +4 = 7

3/4x +4-4 = 7-4

3/4x = 3

Multiply each side by 4/3

4/3 * 3/4x = 3 *4/3

x = 4

**Answer:**

34

**Step-by-step explanation: goes up in 7's**