Differentiate.
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Simplify.(9y4 - 6y2) + (8y4 - 5y2)
A. 17y8 - 11y4 B. 6y12 C. 17y4 - 11y2 D. 6y6
Factor the polynomial by substitution.8z6 + 6z3 - 9
A. (2z3 + 3)(4z3 - 3) B. (2z3 + 1)(4z3 - 9) C. (4z3 + 3)(2z3 - 3) D. 8(z3 - 3)(z3 + 3)
Graph. Label any intercepts and determine the slope of the line. If the slope is undefined, state this.x = 6
A. x-intercept: (0, 6), m: 0
B. x-intercept: (0, 0), m: 6
C. x-intercept: (6, 0), m: undefined
D. x-intercept: (6, 0), m: 
Answer the question asked. When necessary, round to the nearest hundredth.Three gift wrappers can wrap a box full of gifts in 10 minutes, 20 minutes, and 90 minutes, respectively. How long will it take them to wrap the box full of gifts if they work together? (Round to the nearest minute, if necessary.)
A. 7 min B. 120 min C. 6 min D. 40 min