According to the National Sleep Foundation, teenagers need about 9 hours of sleep each night to function at thelr best. Unfortunately, many teens do not get nearly this amount. Two samples of 100 teenagers were asked about the
average number of hours they sleep each school night. The results are recorded in the table below.
<4 4-6 6-8 8-10 10+
Sample #12
939
44. Select all that apply
6
Sample #2 1 12
34
48
5
5
Based on the results of the survey, which of the following inferences are valid?
Adults need less sleep than teenagers.
About half of teenagers get less than 8 hours of sleep each school night.
At least 10% of teenagers have sleep-related issues such as depression, insomnia, and drowsiness during the day.
Half of teenagers get the recommended 9
1
hours of sleep each school night.
More than 90% of teenagers get between 4 and 10 hours of sleep each school night.

the least common denominatore of 7 and 2 is 9

step-by-step explanation:

7+2=9

hope this is what you were asking for!

step-by-step explanation:

simplifying

5(x + -6) = 2(x + 3)

reorder the terms:

5(-6 + x) = 2(x + 3)

(-6 * 5 + x * 5) = 2(x + 3)

(-30 + 5x) = 2(x + 3)

reorder the terms:

-30 + 5x = 2(3 + x)

-30 + 5x = (3 * 2 + x * 2)

-30 + 5x = (6 + 2x)

solving

-30 + 5x = 6 + 2x

solving for variable 'x'.

move all terms containing x to the left, all other terms to the right.

add '-2x' to each side of the equation.

-30 + 5x + -2x = 6 + 2x + -2x

combine like terms: 5x + -2x = 3x

-30 + 3x = 6 + 2x + -2x

combine like terms: 2x + -2x = 0

-30 + 3x = 6 + 0

-30 + 3x = 6

add '30' to each side of the equation.

-30 + 30 + 3x = 6 + 30

combine like terms: -30 + 30 = 0

0 + 3x = 6 + 30

3x = 6 + 30

combine like terms: 6 + 30 = 36

3x = 36

divide each side by '3'.

x = 12

simplifying

x = 12

this should .