Solve.If y varies inversely as x and y = 15 when x = 8, what is y when x = 24?
A. 3
B. 40
C. 64
D. 5
Answer: D
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Let x represent one number and let y represent the other number. Use the given conditions to write a system of equations. Solve the system and find the numbers.The sum of two numbers is 20. If one number is subtracted from the other, their difference is 7. Find the numbers.
A. 12.5 and 7.5 B. 13.5 and 6.5 C. 14.5 and 5.5 D. 10.5 and 9.5
Solve. If necessary, round percents to the nearest tenth, dollar amounts to the nearest cent, and all other numbers to the nearest whole.In an office building, 24 offices are currently being unrented. This represents 6% of the total units. How many offices are there in the building?
A. 400 offices B. 40 offices C. 4,000 offices D. 144 offices
Perform the indicated operations. Write the result using only positive exponents. Assume all variables represent nonzero real numbers.
A. 
B. 
C. 
D. -310
Use the graph of the quadratic function to find the vertex, axis of symmetry, x- and y-intercepts, and domain and range.
A. vertex: (-2, 1) axis of symmetry: x = -2 x-intercepts: -1 and - 3 y-intercept: -3 domain: (-?, 1] range: (-?, ?) B. vertex: (1, -2) axis of symmetry: x = 1 x-intercept: -3 y-intercepts: -1 and - 3 domain: (-?, ?) range: (-?, 1] C. vertex: (-2, 1) axis of symmetry: x = 1 x-intercepts: -1 and - 3 y-intercept: -3 domain: (-?, ?) range: (-?, 1) D. vertex: (-2, 1) axis of symmetry: x = -2 x-intercepts: -1 and - 3 y-intercept: -3 domain: (-?, ?) range: (-?, 1]