Can someone help me with math?

Posted on 2015-10-16 06:41:00 in Math by DAVIL

1.) In a class of 80 seniors, there are 3 boys for every 5 girls. In the junior class, there are 3 boys for every 2 girls. If the two classes combined have an equal number of boys and girls, how many students are in the junior class?

a. 80
b. 84
c. 100
d. 120
e. 72

2.) Sales for a business were 3 million dollars more the second year than the first and sales for the third year were double the sales for the second year. If sales for the third year were 38 million dollars, what were the sales, in millions of dollars , for the first year?

a. 17.5
b. 16
c. 22
d. 35
e. 20.5

3.) In the standard (x, y) coordinate plane, what are the coordinates of the midpoint of a line with endpoints (-1, 3) and (2, 5)?

a. (3/2, 4)
b. (3/2, 1)
c. (1/2, 4)
d. (3, 2)
e. (1, 8)

4.) Triangle ABC is isosceles, and the measure of angle A is 74 degrees. What must be the measure of another angle of this triangle?

a. 32
b. 53
c. 42
d. 74
e. cannot be determined

5.) If x + 2/3 = 8/21 , then x= ?

a. -1/21
b. 1/21
c. -2/7
d. -8/21
e. 2/7

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