Solve by the substitution method.x - 5y = 78x - 4y = 56
A. {(x, y)|x - 5y = 7}
B. {(-7, -1)}
C. {(7, 0)}
D. ?
Answer: C
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The following data show the world population W, in billions, t years after 1950. t 0 20 30 50 60 W 2.56 3.71 4.45 6.09 6.85? A: Use logistic regression to model W as a function of t. Round the r value to three decimal places.B: Plot the graph of the data along with the model you found in part A. Your graph should show the world population up to the year 2100.C: According to the model, when was the world population growing at its fastest rate? ? Round your answers to two decimal places, if necessary.
What will be an ideal response?
Rearrange the equation into standard form.4x2 = -4x - 5
A. 4x2 - 4x - 5 = 0 B. 4x2 + 4x = -5 C. 4x2 + 4x + 5 = 0 D. 4x2 - 4x + 5 = 0
Find the total annual premium. Use the fire insurance rate table. Rates are for each $100 of insurance.
Area Rating: 1Building Classification: ABuilding Value: $182,000Contents Value: $38,000
A. $576.60 B. $677.40 C. $57.66 D. $713.20
Solve the problem.Ten students in a graduate program were randomly selected. Their grade point averages (GPAs) when they entered the program were between 3.5 and 4.0. The following data were obtained regarding their GPAs on entering the program versus their current GPAs. The linear model for this data is 
where x is entering GPA and y is current GPA. Use this model to predict current GPA of a student whose entering GPA is 3.1.Entering GPACurrent GPA 
A. 3.77 B. 3.39 C. 3.57 D. 3.28