I’m so confused pls

solve for x: 2/10 = 3/x-9

a. 9
b. 10
c. 16
d. 24

Adam drew two same size rectangles and divided them into the same number of equal parts. he shaded 1/3 of one rectangle and 1/4 of the other rectangle. what is the least number of parts into which both rectangles could be divided into?

The ratios 3: 9, 4: 12, 5: 15, and 6: 18 are a pattern of equivalent ratios in the ratio table. which is another ratio in this pattern?

What is the average diastolic blood pressure for adults