Question

5. About 0.36 of the students at a middle school are seventh graders.

a. What fraction of the students at the middle school are not seventh graders?

b.There are equal numbers of sixth and eighth graders at the middle school. What percent of the students at the middle school are sixth graders?

Answer 1

Answer: A. 9/14 B. 8/25.

Step-by-step explanation: 9/14=0.642857143 and 8/25=0.32 it is 0.32 because that is 0.64 cut in half.

Answer 2

Answer: 18 sixth graders

Explanation:

Let

x-----> the number of sixth graders in the band

y-----> the number of seventh graders in the band

we know that

-----> equation A

------> isolate the variable y

-----> equation B

Substitute equation B in equation A

x+ (1.5x) = 45

2.5x=45

x=45/25= 18 sixth graders