Which of the following is not an aquatic ecosystem A. Marsh
B. River.
C. Tundra
D. Swamp

Abike shop sells you a bicycle for $63 and a helmet for $21. the total cost is 150% of what the shop spent originally. how much did the shop spend originally? how much profit did the bike shop earn by selling the bicycle and helmet to you ?

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?

What is the equation of a line that passes through points (0, 4) and (-4,-8)?