Which operations would create an equivalent system of equations with opposite like terms?
3x-3y = 3
4x+5y = 13
the first equation can be multiplied by 5 and the second equation by 3.
the first equation can be multiplied by -4 and the second equation by-3.
the first equation can be multiplied by 4 and the second equation by -4.
the first equation can be multiplied by 3 and the second equation by 5.

Flashback to semester a. are triangles pqr and stu congruent? what is the congruency that proves they are congruent? what is the perimeter of triangle pqr? show your work.

The number of hours per week that the television is turned on is determined for each family in a sample. the mean of the data is 37 hours and the median is 33.2 hours. twenty-four of the families in the sample turned on the television for 22 hours or less for the week. the 13th percentile of the data is 22 hours. approximately how many families are in the sample? round your answer to the nearest integer.

The radius of the circle below intersects the unit circle at (3/5,4/5). what is the approximate value of theta? 0.6 radians 1.0 radians 36.9 degrees 53.1 degrees