What is the simplified form of the following expression? (-2x^5+3x^2-4x+9)-(2x^2+5x-6)-(-3x^ 5+8x^4-7x^2-15)

(c) a vine called the mile-a-minute weed is known for growing at a very fast rate. it can grow up to 0.5 ft per day. how fast in inches per hour can the mile-a-minute weed grow up to? show your work using the correct conversion factors.

Given the equation negative 4 square root x minus 3 equals 12

Which math statement does not contain a math variable ?