40 points and !

which of the scenarios can the following graph describe?

a.
the speed of a hiker who climbs up and then down a mountain

b.
the value of a company as it is created and then goes bankrupt

c.
the total distance traveled as you drop off something at the post office and then travel to your neighbor's house before going back home

d. the height of an airplane from the time it takes off to its maximum elevation

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

1. evaluate 8x(2)y9(-2) for x=-1 and y=2 2. simplify the equation. -() 3. simplify the expression. [tex]\frac{5}{x(-2) y9(5)}[/tex]

Statements reasons 1. ab ? cd; ad ? bc 1. given 2. ac ? ac 2. reflexive property 3. ? adc ? ? cba 3. ? 4. ? dac ? ? bca; ? acd ? ? cab 4. cpctc 5. ? dac and ? bca are alt. int. ? s; ? acd and ? cab are alt. int. ? s 5. definition of alternate interior angles 6. ab ? cd; ad ? bc 6. converse of the alternate interior angles theorem 7. abcd is a parallelogram 7. definition of parallelogram what is the missing reason in step 3?