The negative sign outside the brackets means to reflect, or flip, the line over the x-axis.
When the line is flipped from a positive to a negative slope, it will still go through point (4,
0). Therefore, the correct answer is (B).
- or 3.75
According to the question, h(t) = 120 and t = 8. Plug these values into the function to get
120 = a(8^2 ). Simplify the equation to get 120 = a(64) and 120 = 32a. Solve for a to get
a = 3.75. The correct answer is 3.75.
- 2 Whenever there are two equations with the same two variables, they can be solved
simultaneously by adding or subtracting them. The key is to get one variable to disappear.
Multiply the first equation by 3 to get 9h – 3j = 21. Stack the equations and add them.
Therefore h = 2, and the correct answer is 2.
