Yesterday, leila had d baseball cards. today, she gave 10 away. using , write an expression for the number of cards leila has left.

d - 10

Step-by-step explanation:

Because the amount of Leila’s baseball cards was d, subtract 10 from it to get Leila’s amount of baseball cards now.

d - 10

d-10

Step-by-step explanation:

I don't know the word after "Using".

"Gave away" means having less, which means that you should subtract.

d-10

146%

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."