At harriet tubman middle school, there are 85 students in the 7th grade . the number of girls is 1 1/2 times the number of boys. how many girls and how many boys are in the 7th grade?

Number of boys in 7th grade=34 boys

Number of girls in 7th grade=51 girls

Step-by-step explanation:

Total Number of students in 7th grade=Number of boys+Number of girls

where;

Total number of students in 7th grade=85 students

Number of boys=x

Number of girls=(1 1/2)×Number of boys=(3/2)×x=1.5x

Replacing;

85=x+1.5x

2.5x=85

x=85/2.5

x=34

Number of boys=x=34

Number of girls=1.5x=1.5×34=51

Number of boys in 7th grade=34 boys

Number of girls in 7th grade=51 girls

i would need to see the dot plot : )

- "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."