Which of these is a trinomial?

A. 5xy

B. X + 2y^2 - 7

C. 2x - 7

D. 2x^3 - 7y^3

The triangles are similar. what is the value of x? show your work.

Which conjunction is disjunction is equivalent to the given absolute value inequality? |x+2|< 18

The function a represents the cost of manufacturing product a, in hundreds of dollars, and the function b represents the cost of manufacturing product b, in hundreds of dollars. a(t) = 5t + 2 b(t) = 7t - 2t +4 find the expression that describes the total cost of manufacturing both products, a(t) + b(t). a. 7t^2 - 7t + 2 b. 7t^2 + 3 +6 c. 7t^2 + 7t - 6 d. 7t^2 - 3t + 6