Write the phrase as an algebraic expression. Let x represent the unknown number.The ratio of a number and 4
A. 4x
B. 
C. x - 4
D. x + 4
Answer: B
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A garden store sells Kentucky bluegrass seed for $6 per pound and ryegrass seed for $3 per pound. How much rye must be mixed with 140 pounds of bluegrass to obtain a blend that will sell for $5 per pound?
A. 70 lb B. 100 lb C. 80 lb D. 85 lb E. 50 lb
Solve the system by the addition method. If there is no solution or an infinite number of solutions, so state. Use set notation to express the solution set.
A. no solution; ?
B. {(6, 2)}
C. infinitely many solutions; {
6x + 2y = 3} or {
6y = 9 - 18x}
D. {(0,0)}
For the function represented in the graph, determine the domain or range, as requested.Find the range.
A. {y? -5 ? x ? 3} B. {y? -2 ? x ? 2} C. {-5, -4, -3, -2, -1, 0, 1, 2, 3} D. {-4, -3, -2, -1, 0, 1, 2, 3, 4}
A hummingbird’s heart can beat 1260 times per minute. Estimate the number of times its heart will beat in 2 years. State your answer in scientific notation.
What will be an ideal response?