Simplify the expression by combining like terms -3x - 8 + 7x - 1

The multiplication property of zero states that the product of any number and 0 is 0. what must be true about either a or b to make ab=0

In the following diagram it is given that dec,ab || dc, ad || eb, and ad is congruent to bc. a)why isn't abc a parallelogram even though it has a pair of parallel sides and a pair of congruent sides b)explain why be must be congruent to bc. further explain what type of triangle this makes triangle abc and what it tells you about angle 1 and angle 2c) finally why must angle 3 be congruent to angle 1? further, explain why we know that angle 3 is congruent to angle 2

1yd 1 ft = 1 1/12 1 1/3 1 1/2 1 1/6