Solve the following system of equations by substitution. 1. y=x+3 and y=2x+1

2. x+y=7 and x+2y=11

3. 2y=x+7 and x=y-4

4. -3x-4y=-2 and y=2x-5

Agiven line has the equation 2x + 12y = −1. what is the equation, in slope-intercept form, of the line that is perpendicular to the given line and passes through the point (0, 9)? y = ( )x + 9

Determine whether the quadrilateral below is a parallelogram. justify/explain your answer (this means back it up! give specific information that supports your decision. writing just "yes" or "no" will result in no credit.)

Julian wrote the following numeric pattern on the board3,10,17,24,31,38.what numbers of julian's pattern are compound numbers.