1- Solve the systems of equations with the following methods: -2x-y=-6 4x+8y=-24 a-Solve the system by using substitution

b-Solve the system by using elimination

Find the height of a square pyramid that has the volume of 32 ft.³ and a base lengthof 4 feet

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

What would be the reasons for lines 3 and 4? a. addition property; subtraction property b. addition property; solve c. substitution property; subtraction property d. substitution property; prove