Which pair of equations represents perpendicular lines?

a x+2y=8 : 2x-y=-8

b x+2y=8 : 2x+y=8

c x+2y=8 : - x-2y=8

d x+2y=8 : -x-2y=-8

Solve the equation - t = 9 (t-10) - t=9 (t-10)

Based only on the information given in the diagram and no additional reasoning, which congruence theorems and postulates could be given as reasons why ABC LMN? Check all that apply.

In the 2010 census, the final count was 308,745,538 people. The general population is estimated to have been undercounted by about 2.5%. That is (100-2.5) percent of the people were counted.

Plane and simple riddles what did et do in the restaurant

How to solve 2x-5+3a-5x+10a for combining like terms

Y=2 (x-0.5) + 4 I need to put this in slope intercept formula

The ratio of the number of skiers who bought passes to the number of snowboaders who bought season passes is 1:2. if 1250 more snowboarders bought season passes then skiers, how many snowboarders and how many skiers bought season passes

Prove algebraically what type of function this is (even, odd, or neither). f (x) = x4 - x2

Which one is bigger 4m or 400dm

Caitlin's $5000 CD is nearing its maturity and will have a maturity value of $6101.89. The renewal rate for her CD will be lower than the current one, but still 0.5% higher than her savings account.