What multiplys to -4 but adds to -2

Phillip had some bricks. he stacked them in 6 equal piles. which expression shows the number of bricks phillip put in each pile? let the variable m stand for the unknown number of bricks. m + 6 m÷6    m−6    6m

The midpoints of the sides of the large square are joined to form a smaller square. what is the area of the smaller square

3x + 4y = 5 x- 3y = -7 solve by substitution