Sophie wants to know the percentage of teenagers who like going to the dentist. Which would be the best group to survey? A 50 patients at a dentist’s office

B 50 students in the high school cafeteria

C 50 students whose mother or father are dentists

D 50 people of all ages on the subway

f

step-by-step explanation:

f

17   x 256=4352

sorry if this is wrong, i'm new.

step-by-step explanation:

2x^2+5x+17

your welcome. : )

- "runner b is moving at a slower rate."

- "the graphs shown are graphs of distance(km) against time(min).

the slopes of this graphs are are given by:

slope = (change in y)/(change in x)

= (change in distance)/(change in time)

this is the formula for finding the speed. so, the slope of these graphs represent the speed of the runner.

taking each division in the graph to represent 1 on both axis:

runner a ⇒ speed = (2-0)/(1-0)

= 2/1

= 2 km/min

runner b ⇒ speed = (3-0)/(3-0)

= 3/3

= 1 km/min

this shows that   runner b is moving at a slower rate."