Fill in the blank spaces
y2 + 15y + 56 = (y + 7)(y +_)
a. –8
b. 8
c. –7
d. 7

z2 + 9z – 90 = (z – 6)(z +mc005-1.jpg)
a. –15
b. 15
c. –9
d. 90

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