Simplify the number using the imaginary unit i : square root of -144 a. 12 b. -12 c. 12i d. 144i

What is the area of triangle abc if a = 8, b = 11, and c = 15?

Agroup of students want to create a garden. they do not know the exact measurements but they propose using a variable to represent the length and width of the garden. the length of the garden is 10 feet longer than double the width. use a single variable to write algebraic expressions for both the length and width of the garden. write an algebraic expression for the area of the garden. use mathematical terms to describe this expression.

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?