If one ratio is equivalent to another, that means that you multiply the top and the bottom on one ratio by a constant to get the larger ratio. D does that here for us. We have to multiply 3 by 5 to get to 15, so 16 times 5 better be 80 and it is.
Answer: x = 9
Step-by-step explanation:
9/x = x/16
y^2 + 16^2 = 49
root 16^3= 16 - y
square root 49 = 7
y is the variable for this example
16 - y = 16 - 7 because y = 7
16 - 7 = 9
x = 9
You are right it is c. 65/100=×/90
