The formula c=kmt is used to find the number of calories a person burns during exercise, where m is the person’s weight in pounds, t is time in minutes, c is calories, and k is a constant for the rate of calories burned during exercise. find the units for the coefficient k.

Cal/(lb x min)

Step-by-step explanation:

C=kmt

k is multiplied by mt, so you should undo it my dividing mt on both sides. kmt/mt would cancel out leaving k.  The equation should be:

k=C/mt

Put mt into parenthesis, and m is lbs and t is time (min).  They are multiplied by each other, so this should be seen inside the parenthesis.  The equation should be:

k= Cal/(lb x min)

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