Use the quadratic formula to solve the quadratic equation. Approximate the solutions to the nearest tenth.2x2 + 6x = -1
A. -2.8, -0.2
B. -4.3, -1.7
C. -2.8, -0.1
D. 0.2, 2.8
Answer: A
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Solve the problem and write the answer using scientific notation.A light-year is the distance that light travels in one year. Find the number of miles in a light-year if light travels 1.86 × 105 miles per second.
A. 5.86 × 107 miles B. 5.86 × 1012 miles C. 5.86 × 105 miles D. 5.86 × 1014 miles
Solve the problem.A retail store had monthly sales of $89,800 and spent 12% of it on freight costs. How much was spent on freight costs?
A. $748,333 B. $74,833 C. $10,776 D. $107,760
Let f(x, y) = x2exy. Find 
. Is 
the correct answer?Enter "yes" or "no".
Fill in the blank(s) with the appropriate word(s).
Solve the problem.A box has a volume of 30 cubic feet. The height of a box is 1 foot more than its length, and its length is 4 feet more than its width. Let x be the height. (i) Write a polynomial that gives the volume of the box in terms of x.(ii) Write an equation whose solution gives the height of the box.(iii) Solve the equation by using factoring.
A. (i) x3 - 6x2 + 6x; (ii) x3 - 6x2 + 6x = 30 (iii) 7 ft B. (i) x3 - 6x2 + 5x; (ii) x3 - 6x2 + 5x = 30 (iii) 6 ft C. (i) x3 - 7x2 + 5x; (ii) x3 - 7x2 + 5x = 30 (iii) 7 ft D. (i) x3 - 5x2 + 5x; (ii) x3 - 5x2 + 5x = 30 (iii) 5 ft