Find the vector(s) v satisfying the given conditions

u= (4,5), u*v= -1, |v|^2=25

The height of a triangle is 4 in. greater than twice its base. the area of the triangle is no more than 168 in.^2. which inequalitycan be used to find the possible lengths, x, of the base of the triangle?

Mrs. morton has a special reward system for her class. when all her students behave well, she rewards them by putting 3 marbles into a marble jar. when the jar has 100 or more marbles, the students have a party. right now, the the jar has 24 marbles. how could mrs. morton reward the class in order for the students to have a party?

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?