8: Bob completed 80% of the 30 question test. How many questions does he have left to do? Write an equation or proportion and solve. Please show work!!

What is the distance between a and b? round your answer to the nearest tenth. a coordinate plane is shown. point a is located at negative 1, 5, and point b is located at 4, 1. a line segment connects the two points.

If you prove that ∆wxz is congruent to ∆yzx, which general statement best describes what you have proved?

Abby is collecting rainfall data. she finds that one value of the data set is a high-value outlier. which statement must be true? abby will use a different formula for calculating the standard deviation. the outlier will increase the standard deviation of the data set. the spread of the graph of the data will not change. abby will not use the mean when calculating the standard deviation.