The hardcover version of a book weighs 7 ounces while its paperback version weighs 5 ounces. Forty-five copies of the
book weigh a total of 249 ounces,
Weight of Books
Number Weight per book
of Books (ounces)
Total Weight
(ounces)
7h
5
Hard Cover
Paperback
Total
Which value could replace x in the table?
45-h
45
249
40 -
50 - 6
5(45) - h
5(45 - h)

step-by-step explanation:

from the graph attached below:

domain of graph is the value of x for which the given function profit function p(x) is defined.

(a) the domain represents the number of years for which the outlet will earn a profit.

range of profit function defines the lowest to highest value of profit earned.

(b) the range of this function is (0 , 160 ). for this function, the range represents the outlet's profit earned.

51-50

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."