A. a school has 700 students. if 2 out of every 5 students are high school students, how many high school students are there at the school?

b. if each highschool student spends 279.50 minutes in a school a day, how many total minutes do the high school students spend in class each day?

extension: if the average middle schooler spends 10 percent more time in class than the average highschooler, how much time do the middle schoolers spend in class a day?

280 students

78260 minutes

307.45 minutes per day

Step-by-step explanation:

A  We multiply the total number of students by the fraction that are high schoolers to determine the total number of high schoolers

700 * 2/5 = 280

There are 280 high schoolers

B The total time high schoolers spend in school is  the time 1 student spends in school times the number of students

279.5 * 280 =78260 minutes

C  The high schoolers spends 279.5 minutes in class

10% = .1

We need to add 10% to this time

279.5 * 10%

279.5 * .1 = 27.95

Add this  because they spend 10% more time

279.5 + 27.95 =307.45 minutes

no

step-by-step explanation:

2-7=-5

7-2=5

when you combing like terms for ech expression, 5 and -5. these numbers are not equal to each other.