Evaluate each expression. name the property used in each step. 3(22-3 times 7

If the "times 7" is within the brackets, here's the answer.

22 - 3 = 19

19 x 7 = 133

133 x 3 = 399

399

If the "times 7" is outside the brackets, here's the answer.

22 - 3 = 19

19 x 3 = 57

57 x 7 = 399

399

The answers are the same, but this is to provide working for whichever version of the question you are trying to answer.

- "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."

the answer is 3/2 and for decimal: 1.5

hope i

-lavira: )