The sum of two numbers is 21. the difference between them is 5. what are the two numbers?

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?

What value of x will make the triangles similar by the sss similarity theorem?

Write the equation for the parabola that has x− intercepts (−2,0) and (4,0) and y− intercept (0,4).