Han says the equation e+290=450describes the situation. He says that he can rewrite his equation as e=450+(-290) to solve for e. What was the initial elevation of the hiking club? Compare your strategy to Han's strategy for determining the initial elevation. How can we solve equations similar to the format of Han's equation? (x + p = q)

The decibel level of sound is 50 db greater on a busy street than in a quiet room where the intensity of sound is watt/m2. the level of sound in the quiet room is db, and the intensity of sound in the busy street is watt/m2. use the formula , where is the sound level in decibels, i is the intensity of sound, and is the smallest sound intensity that can be heard by the human ear (roughly equal to watts/m2).

Write an equation for the function that includes the points (1,4/5) and (2,2/3)

You buy five cds at a sale for $5.95 each. write an expression for the total cost of the cds. then use the distributive property and mental math to evaluate the expression.