Researchers are studying the effects of exercise on resting pulse rates. They have found 20 men to participate in the study. 10 of the men get at least 150 minutes of moderate exercise each week (Group 2) and the other 10 men do not exercise (Group 1). The resting
pulse rate data for the two groups at the end of the study are shown in the table. The pulse rates are in beats per minute
2
3
Subject number
Group 1
5, 10
80 104 - 122 % 90 10
80 76 60 56 58 70
Group 2
What is the mean and median for each group? What do these numbers tell you about the data?

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

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

answer: 1inch=7days  

12inch=12*7=84days

step-by-step explanation: