Answer soon it would mean a lot : )

there are 18 boys and 12 girls in a math class .what is the ratio of girls to total students.
a) 18: 30
b) 12: 30
c) 30: 12
d) 30: 18

Phyllis and chen are saving money to go to a football game. each friend starts with some money and saves a specific amount each week. phyllis made a graph to show the total she has saved at the end of each week. chen wrote an equation to show the total, y, he has saved at the end of each week, x. y = 15x + 15 compare the amount that each friend has when both friends start saving. select the correct answer from the drop-down menu to complete the statement. phyllis starts with $ and chen starts with $

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Organic apples are on special for $1.50 per pound. does total cost vary inversely or directly with the number of pounds purchased? find the cost of 3.4 pounds of apples. a. inversely: $5.10 b. directly; $5.10 c. inversely: $2.27 d. directly; $2.27