Questions in mathematics

Questions in mathematics

📝 Answered - Students were asked how many hours during the weekend they studied for a Monday exam. Each row of the table represents one sample from the class. Find the mean of each sample. | 11 | 8 | 9 | 4 | |---|---|---|---| | 6 | 6 | 2 | 6 | | 14 | 0 | 3 | 7 | | 5 | 4 | 5 | 2 | Mean of samples in row 1: $\square$ Mean of samples in row 2: $\square$ Mean of samples in row 3: $\square$ Mean of samples in row 4: $\square

📝 Answered - Using the side-splitter theorem, Daniel wrote a proportion for the segments formed by line segment DE. What is [tex]EC[/tex]? [tex]\frac{BD}{DA}=\frac{BE}{EC} \\ \frac{5}{3}=\frac{4}{EC}[/tex] A. 2 units B. 2.4 units C. 3 units D. 3.75 units

📝 Answered - Solve the rational inequality $\frac{a+3}{a}<0$. Express the answer in interval form. A. $[-3,0)$ B. $(0,3)$ C. $(-3,0)$ D. $[0,3)$

📝 Answered - Exercise 5.3 1. The cost of a pair of shoes increases by $20 \%$ to E420. (a) What percentage of the old price is the new price? (b) Calculate the original price.

📝 Answered - Given the formula $6 x^2+7 x-8$ find its value when x is equal to: $ \begin{array}{l} x=0: \square \\ x=2: \square \\ x=-2: \square \end{array}$

📝 Answered - What is the solution to the linear equation? $2.8 y+6+0.2 y=5 y-14$ A. $y=-10$ B. $y=-1$ C. $y=1$ D. $y=10$

📝 Answered - A man weighed 265 pounds. He lost 25 pounds in 6 months. Then he gained 10 pounds 4 months later. What percent of his weight did he lose in the first 6 months? Round your answer to the nearest hundredth if necessary.

📝 Answered - Consider these sample means for the number of weekend hours spent studying for a Monday exam. | Sample | Sample Mean | | :----- | :---------- | | 1 | 8 | | 2 | 5 | | 3 | 6 | | 4 | 4 | Which statements are true? Check all that apply. A. The variation in the sample means is less than 5. B. The variation in the sample means makes population predictions invalid. C. The actual population mean most likely will be between 4 and 8. D. The sample means can be used to make predictions about the population mean. E. The population mean is greater than 8.

📝 Answered - What is the equation, in point-slope form, of the line that is parallel to the given line and passes through the point $(-3,1)$? A. $y-1=-\frac{3}{2}(x+3)$ B. $y-1=-\frac{2}{3}(x+3)$ C. $y-1=\frac{2}{3}(x+3)$ D. $y-1=\frac{3}{2}(x+3)$

📝 Answered - Choose the compound inequality that can be used to solve the original inequality $|3x-5| > 10$. A. $-10 < |3x-5| < 10$ B. $3x-5 > -10$ or $3x-5 < 10$ C. $3x-5 < -10$ or $3x-5 > 10$ D. $-10 < 3x-5 < 10$