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Questions in mathematics

[Jawaban] Choose the equation that represents the solutions of $0=0.25 x^2-8 x$. A. $x=\frac{8 \pm \sqrt{(-8)^2-(4)(0.25)(0)}}{2(0.25)}$ B. $x=\frac{-8 \pm \sqrt{(-8)^2-(4)(0.25)(0)}}{2(0.25)}$ C. $x=\frac{-0.25 \pm \sqrt{(0.25)^2-(4)(1)(-8)}}{2(1)}$

[Jawaban] Let $U=\{a, b, c, d, e, f, 4,5,6,7,8,9\}, X=\{a, b, c, 5,6,7\}$, and $Y=\{b, d, f, 4,6,8\}$. List the members of the set $X^{\prime} \cap Y^{\prime}$, using set braces. $X ^{\prime} \cap Y ^{\prime}=\{ \square \}$ (Use a comma to separate answers as needed.)

[Jawaban] Complete the entries by dividing the integers. | ÷ | 18 | -12 | |---|---|---| | 3 | 6 | -4 | | -2 | -9 | 6 | | ÷ | 21 | 42 | |---|---|---| | 3 | | | | 7 | | | | ÷ | -24 | -36 | |---|---|---| | -6 | | | | -4 | | | | ÷ | 0 | 70 | |---|---|---| | 7 | | | | -5 | | | | ÷ | 44 | -32 | |---|---|---| | -4 | | | | 2 | | | 1. What are the rules in dividing integers? 2. How did you find the activity? Can you share and describe your experience?

[Jawaban] 28 - [65 ÷ 5 + (9 + 9) - (6 - _)] = 19

[Jawaban] 3. Which angle measures more than 90 degrees? A. acute angle B. right angle C. obtuse angle D. straight angle 4. Which of the following is a measure of an obtuse angle? A. 70° B. 90° C. 120° D. 180°

[Jawaban] Fill in the blanks to show ascending order. a. 128, 135, 119 b. 128, 58 c. 781, 824, 1613 d. 257, 36 e. 389, 427, 202 f. 589, 85 Fill in the blanks to show descending order. a. 316, 301 b. 870, 7

[Jawaban] Kelly took three days to travel from City C to City D by automobile. On the first day, Kelly traveled [tex]\frac{2}{5}[/tex] of the distance from City C to City D; and on the second day, she traveled [tex]\frac{2}{3}[/tex] of the remaining distance. Which of the following is equivalent to the fraction of the distance from City C to City D that Kelly traveled on the third day? 1. [tex]1 - \frac{2}{5} - \frac{2}{3}[/tex] 2. [tex]1 - \frac{2}{5} - \frac{2}{3}(\frac{2}{5})[/tex] 3. [tex]1 - \frac{2}{5} - \frac{2}{5}(1 - \frac{2}{3})[/tex] 4. [tex]1 - \frac{2}{5} - \frac{2}{3}(1 - \frac{2}{5})[/tex] 5. [tex]1 - \frac{2}{5} - \frac{2}{3}(1 - \frac{2}{5} - \frac{2}{3})[/tex]

[Jawaban] Which of the following sequences are not geometric? Check all that apply. A. -4, -2, -1, -0.5,-0.25, -0.125 B. 1, 4, 9, 16, 25, 36 C. 1, 1, 2, 3, 5, 8, 13, 21 D. 2, 10, 50, 250, 1250

[Jawaban] Select the correct answer. A home-based sign company uses this function to model its monthly profit, where $x$ is the price of each sign it sells. [tex]p(x)=-10 x^2+498 x-1,500[/tex] What is the company's profit if it sells each sign for $20? A. $1,402 B. $14,420 C. $4,460 D. $18,020

[Jawaban] Seven employees attended a 5-day training to learn about a new product. Release Time: $880 per day Instructional Materials: $25 per person Food: $95 per person Travel: $275 per person What was the total cost of travel expenses?