Pls! you!
1) in the morning, the temperature was -4.6 f. by the afternoon, the temperature was -9.4 f. what was the change in temperature
2) ron made withdrawals of $46.79 and $18.93 from his checking account. he also deposited $30. if his balance before these transactions was $71.24, what is his balance now?
explanation pls!

When drawing a trend line for a series of data on a scatter plot, which of the following is true? a. there should be an equal number of data points on either side of the trend line. b. all the data points should lie on one side of the trend line. c. the trend line should not intersect any data point on the plot. d. the trend line must connect each data point on the plot.

12 point are triangles pqr and stu congruent? what is the congruency that proves they are congruent? what is the perimeter of triangle pqr?

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?