Caculate the number in the middle of 12 and 17

Solve the system of linear equations by elimination - 2x+3y=7 and 5x+8y=-2

Use similar triangles to solve. a person who is 55 feet tall is standing 132132 feet from the base of a tree, and the tree casts a 144144 foot shadow. the person's shadow is 1212 feet in length. what is the height of the tree?

Verify the identity. 4 csc 2x = 2 csc^2x tanx

What output is 4 more than twice the input 3

200 songs is 60% of what

Find the zero of the polynomial 2x²+9x+4

M over 4 = - 13 what does m = ? ... ?

Mr. Delaney broke his piggy bank

What is a40 for the arithmetic sequence presented in the table below? n 8 12 an 60 48 Hint: an = a1 + d (n - 1), where a1 is the first term and d is the common difference

Chris was shown the graph of a line that contained (1,7). He wrote f (x) = 4x + 3 to correctly represent the line. Which of these equations could represent the same line.