Answer: 20 students participate in school sports.
Step-by-step explanation:
Since, Mrs. Perez has 28 students.
And, According to the question, 5 /7 of those students participate in school sports.
Therefore, the students participate in school sports = 5/7 of the total number of the students
= 
= 20
Thus 20 students participate in school sports.
ANSWER: 12/20 or 3/5
4/5 of girls have brown hair
3/4 have long hair

Answer:
3(8+2a)
Step-by-step explanation:
You just want to simplify the equations to see if they equal 6a+24, which in this case 3(8+2a) does. The other two equal something else, hopefully this helps :)
Answer:
see below
Step-by-step explanation:
The slope of the given line is 1/2 so the slope of our line will be -2. We can use point-slope formula.
y + 1 = -2(x + 3)
y = -2x - 6 - 1
y = -2x - 7