Solve the equation 7 (x-2)= 42

x=8

Step-by-step explanation:

8-2=6

8x7=42

(checked)

8

Step-by-step explanation:

7 is first multiplied into both sides of the parentheses

7x-14=42

then you add 14 to both sides to get rid of the 14 on the left side

7x-14=42

+14     +14

7x=56

then u divide 7x by both sides

7x/7=56/7

x=8

4 packs of water and 7 packs of candy bars

step-by-step explanation:

35x4=140

140/20=7

- "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."