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Questions in Grade College

📝 Answered - The equation [tex]$\frac{(y-2)^2}{64}+\frac{x^2}{9}=1$[/tex] represents an ellipse. Which lines represent the approximate directrices of the ellipse? Round to the nearest tenth. A. [tex]$x=-8.6$[/tex] and [tex]$x=8.6$[/tex] B. [tex]$x=-6.6$[/tex] and [tex]$x=10.6$[/tex] C. [tex]$y=-8.6$[/tex] and [tex]$y=8.6$[/tex] D. [tex]$y=-6.6$[/tex] and [tex]$y=10.6[/tex]

📝 Answered - Solve: [tex]6^{2 x-3}=6^{-2 x+1}[/tex]

📝 Answered - In the reaction $MgCl _2+2 KOH \rightarrow Mg ( OH )_2+2 KCl$, if 3 moles $MgCl _2$ are added to 4 moles KOH, what determines how much $Mg ( OH )_2$ is made? A. The amount of KOH B. The amount of KCl C. The amount of $MgCl _2+ KOH$ D. The amount of $MgCl _2$

📝 Answered - Solve the following formula for $n$. $p v=n r t$ A. can't be solved for $n$ B. $n=\frac{r t}{p v}$ C. $n=p v-r t$ D. $n=\frac{p v}{r t}$

📝 Answered - Write a story for a primary student that ends with 'I have learnt my lesson.'

📝 Answered - Which word is an example of a demonstrative adjective? A. that B. the C. them D. then

📝 Answered - Given the following computer output: Dependent variable is: grade No Selector R -squared $=73.4 \% \quad R$-squared (adjusted) $=72.1 \%$ The value of the coefficient of determination is: $s=4.847$ with $22-2=20$ degrees of freedom 0.734 4.847 0.721

📝 Answered - Subtract the following. [tex]$\frac{3 x+1}{x}-\frac{3 x}{x+2}$[/tex]

📝 Answered - What do you need to know in order to work out safely? A. Your coach's emergency number. B. Exactly how many calories you're planning to burn. C. All of the rules of a particular sport. D. Your own limitations.

📝 Answered - A regression was run to determine if there is a relationship between hours of TV watched per day [tex]$(x)$[/tex] and number of situps a person can do [tex]$(y)$[/tex]. The results of the regression were: [tex] \begin{array}{l} y=a x+b \ a=-1.34 \ b=36.954 \ r^2=0.966289 \ r=-0.983 \end{array} [/tex] Use this to predict the number of situps a person who watches 5 hours of TV can do (to one decimal place).