3. At the mall, Leona bought a T-shirt and a book for a total of $23. The book costs $12. How much did the T-shirt cost? (a) What is the unknown information?
(b) Let x represent the unknown information. Write an addition equation that models the problem
(c) Solve the equation.
(d) Answer the question.

H(x)=4x2-5x h(-3) what is the answer?

Ineed if you could explain and give me the answer you! this needs done

Television sizes are based on the length of the diagonal of the television's rectangular screen. so, for example, a 70-inch television is a television having a diagonal screen length of 70 inches. if a 70 inch television's diagonal forms a 29°angle with the base of the screen, what is the vertical height (1) of the screen to the nearest inch? 70 inhin