A: what are the solutions to the quadratic equation x^2+9=0?
b: what is the factored form of the quadratic expression x^2+9?
select one answer for question a, and select one answer for question b.
a: x=3
a: x=-3i
a: x=3i or x=-3i
a: x=3 or x=-3
b: (x+3)(x+3)
b: (x-3i)(x-3i)
b: (x+3i)(x-3i)
b: (x+3)(x-3)

Acourt reporter is transcribing an accident report from germany. the report states that the driver was traveling 80 kilometers per hour. how many miles per hour was the driver traveling?

Astudent is determining the influence of different types of food on the growth rate of spiders. she feeds one group of spiders two caterpillars twice a week. the other group received similarly-sized beetles twice a week. she records the amount of time required for individuals to reach sexual maturity. her hypothesis is that the spiders feeding on caterpillars will have a faster growth rate because caterpillars have a higher protein content compared to beetles. in this experiment, what is the dependent variable? spiders assigned to different feeding groups. time required to reach sexual maturity number of prey items fed twice a week. growth rates of each group.

The equation line of cd is y=-2x-2. write an equation of a line parallels to line cd in slope-intercept form that contains point (4,5)