I WILL GIVE YOU 5 STARS AND BRAINERLEST ANDCA LIKE IF U ANSWER THIS 2. The Johnsons are planning a family reunion for 21 people. Each family is made up of
three people. Use a model or numbers to solve the equation 3x = 21. How many families
will attend the reunion?
Show your work

x=7

Step-by-step explanation:

3x=21

21 divided by 3 is 7

so x equals 7

7 families

|||+|||+|||+|||+|||+|||+||| = 21

  7 families of 3 = 21

Step-by-step explanation:

3x=21

x=7 families

468

step-by-step explanation:

- "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."