Answer:
Not sure if this is exactly the same,but hopefully it answers your questions.
Answer:
x = 16
Step-by-step explanation:
Using the cosine ratio in the right triangle and the exact value
cos60° = 
cos60° = 
= 
Multiply both sides by x
x × cos60° = 8, that is
x × = 8
Multiply both sides by 2
x = 16
Step 1: simplify both sides of the equation.
Step 2: Flip the equation.
Step 3: Subtract 8 from both sides.
Step 4: Multiply both sides by5.
Answer: Y= 35
Start with the slope formula.
Slope formula can be read as the second y minus the first
y over the second x minus the first x.
So for this problem, the second y minus the first y would be
5 - 2 and the second x minus the first x would be 8 - 4.
5 - 2 over 8 - 4 is 3/4.
So the slope of the line that passes through these points is 3/4.
The formula to calculate the sample size is:
n = Z number * standard deviation/ confidence estimate)^2
The z number for 95% confidence is 1.96
The standard deviation is given as 26 minutes.
The confidence estimate is given as 5 minutes.
The sample size is: (1.96 * 26/5)^2 = 103.87 = 104 shoppers.
