Please help me with this! thank you!

What should be multiplied on both sides to solve the equation below:
3/4x = 9/2?

A. 4/3
B. -9/2
C. 2/9
D. - 3/4

Find the measures of the complement and the supplement of each angle, m

Sally deposited money into a savings account paying 4% simple interest per year. the first year, she earned $75 in interest. how much interest will she earn during the following year?

Sera sells t-shirts at the beach. she believes the price of a t-shirt and the number of t-shirts sold are related. she has been experimenting with different prices for the t-shirts. she has collected a data set with five pairs of data; each consists of the price of a t-shirt and the number of shirts sold. the independent variable, which will go on the x-axis, is . the dependent variable, which will go on the y-axis, is the