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24 questions
Find all real roots of the equation:
(x+7)(x2 - 49) = 0
-7
7
-7 and 7
-7 and 49
Simplify: (2x - 1)(x2 - 2) - x(x2 - x - 2)
x3 - 2x + 2
x3 - 2x - 2
x3 + 2x + 2
x3 + 2x - 2
Would the graph of the following quadratic function open up or open down?
y = -2x2 + 4x +5
up
down
The expression 150(1.02h) represents the number of bacteria in a laboratory experiment at time h, in hours. What does the number 150 represent?
the rate of growth per hour
the number of bacteria after one hour of the experiment
the change in the number of bacteria
the number of bacteria at the start of the experiment
The expression 150(1.02h) represents the number of bacteria in a laboratory experiment at time h, in hours. What does 150(1.02) represent?
the rate of growth per hour
the number of bacteria after one hour of the experiment
the change in the number of bacteria
the number of bacteria at the start of the experiment
Matthew has a job where his daily pay P, in dollars, is given by the function P(h) = 15h, where h represents the number of hours worked that day. Last week, he worked two more hours on Tuesday than he did on Wednesday. If he worked c hours on Tuesday, which statements are true?
Select ALL that apply
P(c) represents Matthew's pay, in dollars, on Tuesday
15c represents Matthew's pay, in dollars, on Tuesday
P(c - 2) represents Matthew's pay, in dollars, on Wednesday
15c - 2 represents Matthew's pay, in dollars, on Wednesday
P(c) - P(c - 2) represents how much more Matthew's pay was on Tuesday than on Wednesday
Students in a statistics class will perform the following experiment and then model it mathematically. They begin with a bag of 256 pennies and complete these steps: (1) Pour the pennies from the bag onto the floor. (2) Count the number of pennies that land heads up and record the number. (3) Put the pennies that landed heads up back in the bag and leave the rest on the floor. Repeat trials until no pennies land heads up.
The model of this will be best represented by what type of function?
linear
quadratic
exponential
square root
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