Answer:

Step-by-step explanation:
Given


Required
Determine the percentage of the tip
First, we calculate the amount paid



The percentage of the tip is then calculated using:





Thw degree of 2x^3 is c. 3
sides of right angle triangle follows Pythagoras theorem
a^2 + b^2 = c^2
where a, b and c are sides of triangle
if you check, option 3 follow this. so answer is option 3
First, find the mean. You'll need it to compute the variance.

The variance of the sample is then computed with the formula

The standard deviation is the square root of the variance, so
Answer:
A. Subtract x from both sides: (i.e. 5+x-12 = x-7 <--> 5-12 = -7)
This equation is identically true, so it holds no matter what x is.
B. This one is pretty self-explanatory
Step-by-step explanation:
u wrote the question wrongly the answer is in answer box
This question also my teacher gives me
hope it helps