Într-o livadă sunt peri pruni și gutui pruni sunt de 2 ori mai multe decât peri și gutui cu 56 mai multe decât peri în total sunt 168 câți peri sunt în livadă Rezolvă problema prin metoda mersului invers​

Matt and brian were solving a system of equations. they both noticed that the two lines had the same slope. brian said that because each line in the system had the same slope, the two lines had to be parallel, which meant the solution to the system was "no solution" matt disagreed, and said they should also look at the y-intercepts before determining how many solutions there were. who is correct?

Write two subtraction equations that are equivalent to 5 + 12 = 17.

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.