yesterday the temperature at noon was 21.5°F. By midnight, it had gone down by 30°F. What was the temperature at midnight​

Rewrite the hyperbolic equation 4y^2 -9x^2 +54x-8y-113=0

What is the greatest number of parts of a circle that can be formed by cutting the circle with 7 straight cuts? (note: the parts do not have to be equal in size)

Which statements about the system are true? check all that apply. y =1/3 x – 4 3y – x = –7 the system has one solution. the system consists of parallel lines. both lines have the same slope. both lines have the same y–intercept. the equations represent the same line. the lines intersect.