Jonah weighs twice as much as zack. write an expression to represent this situation.

What is the standard form of -5x^2+2x^4-11+x^3+3x

Calculate the density of benzene if 300ml of it weighs 263g. a. 0.88 g/ml b. 1.14 g/ml c. 78,900 g/ml d. 37 g/ml

List the sides of δrst in ascending order (shortest to longest) if: m∠r =x+28°, m∠s = 2x+16°, and m∠t = x+12