Book
Maths Puzzle
Algebra
Use the rules of exponents to simplify the expression ( if possible ).
1. (a) 5 2y 4 . y 2
(b) (5y) 2 . y4
2. (a) ( - 5z 3) 2
(b) ( - 5z ) 4
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Book Other Question
"Water from a fire hose is sprayed on a fire 15 m up the side of a wall. The equation H= -0.011x^2 + x + 1.6 models the height of the jet of water and the horizontal distance from t
The model y = 135 + 25 x represent the cost of renting a car, where x is the number of days the car is rented.
a) What is the y-intercept for this model? Describe what this number represents in terms of the variables in the model.
b) What is the slope for this model? Describe does this number mean in terms of renting a car.
c) Evaluate the model for x=4. Describe what the ordered pair in terms of renting a car.