Reena has 12 more dimes than she does quarters. if reena has a total of 28 coins, how many quarters, qq, and how many dimes, dd, does reena have? use the equations and the graph below to arrive at your answer.
q = d –12
q = 28 –d
a. 28 dimes and 12 quarters
b. 20 dimes and 8 quarters
c. 12 dimes and 28 quarters
d. 8 dimes and 20 quarters

walter needs to make at least 5 more cookies but no more than 40. 5 ≤ x ≤ 40

step-by-step explanation:

20 ≤ x + 15 ≤ 55

subtract 15 from all parts

20-15 ≤ x + 15-15 ≤ 55-15

5 ≤ x ≤ 40

this means how many more cookies he has to make

walter needs to make at least 5 more cookies, but no more than 40 cookies; 5 ≤ x ≤ 40

the formula of a slope:

from a table we have

substitute:

the slope of f(x) is -1.

the graph of funcfion g(x) is a horizontal line. the slope of a horizontal line is equal 0. therefore the slope of g(x) is 0.

-1 < 0