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Questions in mathematics

[Answered] What is the difference between a line segment and a ray? A. A line segment extends infinitely in both directions, while a ray has two definite endpoints. B. A line segment is always horizontal, while a ray can be drawn in any direction. C. A line segment is part of a circle, while a ray is always a straight line. D. A line segment has two endpoints, while a ray has only one endpoint and extends infinitely in one direction.

[Answered] \frac{-20+\sqrt{-75}}{40}

[Answered] What is the variance for the data? Employee Weekly Salary Anja $245 Raz $300 Natalie $325 Mic $465 Paul $100 Variance: [tex]s^2=\frac{\left(x_1-\bar{x}\right)^2+\left(x_2-\bar{x}\right)^2+\ldots+\left(x_n-\bar{x}\right)}{n-1}[/tex] 118.35 132.32 14,006

[Answered] Ted is looking over his spending pattern for the past week to try to determine how much money he had on Sunday. This is Ted's spending pattern: | Day | Debit ($) | Credit ($) | | --------- | --------- | ---------- | | Monday | 112 | | | Tuesday | 141 | 18 | | Wednesday | 56 | | | Thursday | 28 | 70 | | Friday | 22 | 42 | | Saturday | 16 | 88 | If the bank charges Ted an overdraft fee of $25 every time he overdraws his account, and Ted overdrew his account on Wednesday but not on Friday, which of the following is a possible amount of money that Ted could have had in his account last Sunday? Assume that the only debits and credits not listed are overdraft fees. A. $300 B. $280 C. $240

[Answered] Which expresses 0.075 as a percent? A. 7.5% B. 0.75% C. 0.075% D. 0.0075%

[Answered] $65 \overline{)99,521}$

[Answered] Marina can bicycle 19.5 miles in the same time it takes her to run 6 miles. She bikes 9 miles per hour faster than she runs. At what speed does Marina run? | | Distance (mi) | Rate (mph) | Time (hr) | | :---------- | :------------ | :--------- | :--------------- | | Bicycling | 19.5 | r+9 | 19.5/(r+9) | | Running | 6 | r | 6/r | | | | | | A. 4 mph B. 5 mph C. 9 mph D. 13 mph

[Answered] Which of the following fractions is equal to 0.06? A. [tex]$\frac{1}{6}$[/tex] B. [tex]$\frac{1}{60}$[/tex] C. [tex]$\frac{6}{10}$[/tex] D. [tex]$\frac{6}{105}$[/tex]

[Answered] Consider the expressions shown below. | A | B | C | | -7x^2-2x+5 | 7x^2-2x+7 | 7x^2+2x-5 | Complete each of the following statements with the letter that represents the expression. (3x^2-6x+11)-(10x^2-4x+6) is equivalent to expression (-3x^2-5x-3)-(-10x^2-7x+2) is equivalent to expression (12x^2+6x-5)-(5x^2+8x-12) is equivalent to expression

[Answered] The table below shows the height of a ball [tex]$x$[/tex] seconds after being kicked. \begin{tabular}{|c|c|} \hline Time(seconds) & Height (feet) \\ \hline 0 & 0 \\ \hline 0.5 & 35 \\ \hline 1 & 65 \\ \hline 1.5 & 85 \\ \hline 2 & 95 \\ \hline 2.5 & 100 \\ \hline 3 & 95 \\ \hline \end{tabular} What values, rounded to the nearest whole number, complete the quadratic regression equation that models the data? [tex]$f(x)=\square x^2+\square x+0$[/tex] Based on the regression equation and rounded to the nearest whole number, what is the estimated height after 0.25 seconds? [tex]$\square$[/tex] feet