Find the missing monomial, factor or term.?(-7y2 + 5y + 6) = 21y3 - 15y2 - 18y
A. -3y2
B. -3y
C. 21y
D. -3y3
Answer: B
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The temperature of an oven remains constant at 391 degrees Fahrenheit. A potato is placed in the oven to bake. The difference between the temperature of the oven and that of the potato after t minutes in the oven is given by 
degrees Fahrenheit. Write a formula that gives the temperature T, in degrees Fahrenheit, of the potato after t minutes in the oven.
?
A. 
B. ?
C. ?
D. ?
Factor the four-term polynomial by grouping.7x - 63 + xy - 9y
A. (x - 9y)(7 + y) B. (y - 9)(7x + y) C. (y - 9)(x + 7) D. (x - 9)(7 + y)
Translate to an equation and solve. When necessary, round to the nearest hundredth.What is 85% of 355?
A. 30.18 B. 301.75 C. 30,175 D. 3017.5
Use the change of base formula and a calculator to approximate the logarithmic expression. Round your answer to four decimal places.log2/319
A. -7.2619 B. 7.2619 C. 8.9261 D. -14.5225