The sum of three numbers is 7. one of the numbers is one more than the sum of the other two numbers. it is also four times the difference between the two numbers.

The slope of a line is –2 and its y-intercept is (0, 3). what is the equation of the line that is parallel to the first line and passes through (2, 2)? a. 2x + y = 6 b. y = –2x + 3 c.y=1/2x +6 d.y=-2x-6

What is the solution of the systems of equations? y=2/3x+3 x=-2

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?