What is the name of this key signature?

g minor
f sharp major
f minor
g major

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

Two line segments are shown in the figure below. suppose that the length of the line along the x-axis is 6, and the length of the hypotenuse of the triangle is 10. what is the equation of the hypotenuse line (shown in red, below)?

Solve the formula ax+ by = c for x.