For which pair of points can you use this number line to find the distance? A number line going from negative 2 to positive 8. Points are at 1 and 7.

A-(–4, 1) and (7, –4)
B-(–4, 1) and (–4, 7)
C-(–1, –4) and (–4, 7)
D-(–4, –1) and (–4, –7)

1. a right triangle is graphed on a coordinate plane. find the length of the hypotenuse. round your answer to the nearest tenth. 2. use the angle relationship in the figure below to solve for the value of x. assume that lines a and b are parallel and line c is a transversal.

Two planes leave an airport at the same time, one flying east, the other flying west. the eastbound plane travels 20 mph slower. they are 1600 mi apart after 2 hr. find the speed of each plane.

Aculture started with 4,000 bacteria. after 5 hours, it grew to 5,200 bacteria. predict how many bacteria will be present after 19 hours. round your answer to the nearest whole number.