Find the value of sin30/cos^(2)45 , tan^(2)60+3cos90+sin0​

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

Someone answer asap for ! a ball is rolled down a ramp. the height, f(x), in meters, of the ball x seconds after it is released is modeled by the function f(x) = x²- 10x + 25 for all values of x from 0 to 5. which statement about the ball is true? a. the maximum height of the ball is 5 meters b. the height of the ball increases from 0 to 5 meters above the ground. c. the ball has traveled 5 meters when it reaches the bottom of the ramp. d. the ball has been traveling for 5 seconds when it reaches the bottom of the ramp