Does the problem involve permutations or combinations? Do not solve.The matching section of an exam has 4 questions and 9 possible answers. In how many different ways can a student answer the 4 questions, if none of the answer choices can be repeated?
A. permutations
B. combinations
Answer: A
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Combine like terms. Then write the polynomial in descending order of powers.-6y9 + 8y8
A. 2y9 B. Cannot be simplified C. 2y8 D. 2y17
Solve the problem by using addition, subtraction, multiplication, or division as needed.Luisa's car used 21 gallons of gasoline when she drove it 651 miles. How many miles per gallon did it get?
A. 630 miles per gallon B. 66 miles per gallon C. 31 miles per gallon D. 21 miles per gallon
Solve.Each week a soft drink machine sells x cans of soda for $0.75/soda. The cost to the owner of the soda machine for each soda is $0.10. The weekly fixed cost for maintaining the soda machine is $25/week. Write an equation that relates the weekly profit, P, in dollars to the number of cans sold each week. Then use the equation to find the weekly profit when 92 cans of soda are sold in a week.
A. P = 0.75x - 25; $44.00 B. P = 0.75x + 25; $94.00 C. P = 0.65x + 25; $84.80 D. P = 0.65x - 25; $34.80
The population of the Earth is approximately 6 billion people and is growing at an annual rate of 2%. Assuming a Malthusian growth model, by what factor will the current population of the Earth increase in 31 years? ? Please enter your answer as a number, rounded to two decimal places.
Fill in the blank(s) with the appropriate word(s).