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Questions in mathematics

📝 Answered - A banker was analyzing credit scores of mortgage clients when he accidentally deleted one of his client's scores from his data table. He already calculated the mean, standard deviation, and [tex]$z$[/tex] scores. Mean [tex]$=780$[/tex] [tex]$\sigma \approx 28$[/tex] [tex]$z_x=1.07$[/tex] [tex]$z_x=\frac{x-\mu}{\sigma}$[/tex] Which equation can you use to calculate the missing credit score? [tex]$1.07=\frac{x-780}{28}$[/tex] [tex]$780=\frac{x-28}{1.07}$[/tex] [tex]$28=\frac{-x-107}{780}$[/tex]

📝 Answered - Which table represents a function? \begin{tabular}{|c|c|} \hline$x$ & $y$ \\ \hline-5 & -5 \\ \hline 0 & 0 \\ \hline-5 & 5 \\ \hline 6 & -6 \\ \hline \end{tabular} \begin{tabular}{|c|c|} \hline$x$ & $y$ \\ \hline-3 & -1 \\ \hline 0 & 0 \\ \hline-2 & -1 \\ \hline 8 & 1 \\ \hline \end{tabular} \begin{tabular}{|c|c|} \hline$x$ & $y$ \\ \hline-4 & 2 \\ \hline 3 & 5 \\ \hline 1 & 3 \\ \hline-4 & 0 \\ \hline \end{tabular}

📝 Answered - Which of the following ordered pairs are solutions of the equation [tex]$y=2 x$[/tex]? A. [tex]$(2,3)$[/tex] B. [tex]$(4,6)$[/tex] C. [tex]$(6,9)$[/tex] D. [tex]$(8,14)$[/tex] (A) A and B only (B) A, B, and C only (C) A, B, and D only (D) C and D only

📝 Answered - $(8 \div(-2))+(-7)-3

📝 Answered - A sequence of numbers follows this rule: Multiply the previous number by -2 and add 3. The fourth term in the sequence is -7. a. Give the next 3 terms in the sequence. [tex]x(-2)+3=-7[/tex] b. Give the 3 terms that came before -7 in the sequence.

📝 Answered - Find the sum of the first 47 terms of the arithmetic sequence. [tex] \begin{array}{l} 30,41,52,63 \\ a_1=30 \\ d=11 \end{array} [/tex]

📝 Answered - A recent poll taken by the movie theatre industry shows that $28 \%$ of the population attends a movie in a theater at least once a month. A sample of 300 people shows that only $12 \%$ of people attends a movie in a theater at least once a month. To determine whether this sample supports the population proportion of 0.28 , a simulation of 100 trials is run, each with a sample size of 200 and a point estimate of 0.12 . The minimum sample proportion from the simulation is 0.10 , and the maximum sample proportion from the simulation is 0.28 . What is the margin of error of the population proportion using half the range? $\pm 0.03$ $\pm 0.05$ $\pm 0.07$ $\pm 0.09

📝 Answered - Directions: For each of the following polynomial graphs, determine any x-values where the graph has a local extrema. If the graph does not have a specific local extrema, write "none" in the appropriate space. Local minimums at x = Local maximums at x =

📝 Answered - 5. $19+1.5(10 m-8)=127$

📝 Answered - Write the number equal to 2 tens 15 ones.