Multiply.2y(3y3 + 10y)
A. 5y4 + 12y2
B. 6y4 + 10y
C. 6y3 + 20y
D. 6y4 + 20y2
Answer: D
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Solve by the substitution method. If the system is inconsistent or dependent, say so.x - 2y = 4-6x - 1y = -24
A. (4, 0) B. No solution C. (5, 4) D. (-4, -1)
Provide an appropriate response.
(i) List the sequence of hexagonal numbers. that corresponds to the sequence of dot patterns above. These are called (ii) What is the ninth hexagonal number?(III) Determine a formula for the nth pentagonal number pn.
A. (i) 1, 7, 22, 50, .... (ii) Ninth hexagonal number: 170 (iii) hn = (n + 1)(2n - 1) B. (i) 1, 6, 15, 28, .... (ii) Ninth hexagonal number: 41 (iii) hn = 5n - 4 C. (i) 1, 6, 15, 28, .... (ii) Ninth hexagonal number: 153 (iii) hn = n(2n - 1) D. (i) 1, 7, 22, 50, .... (ii) Ninth hexagonal number: 144 (iii) hn = 2n(n - 1)
Perform the operation. Write the answer as a fraction in lowest terms. 
+ 
A. 
B. 
C. 
D. 
Provide an appropriate response.To find the rate in increase or decrease problems:
A. divide the amount of change by the rate of change B. divide the larger figure by the smaller figure C. divide the amount of change by the larger amount D. divide the amount of change by the original amount