每日一题

Mathematics>Standard Multiple Choice

Read the following SAT test question and then click on a button to select your answer.

y=x^2+9
y=6x

If (x,y) is a solution to the system of equations shown above, which of the following is the y-coordinate of the solution?

A.-18
B.-3
C.3
D.18

答案和解析

答案：D

解析：

Choice D is correct.