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Questions in mathematics

[Jawaban] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Jawaban] Find the factors of the following numbers: 1. 100 2. 30 3. 12 4. 24 5. 15 Solve the following quadratic equations by factoring. 1. [tex]$-3 m^2+27 m=0$[/tex] 2. [tex]$x^2-2 x=15$[/tex]

[Jawaban] $\left[\begin{array}{cc}-2 & -6 \\ -4 & 3 \\ 5 & 0 \\ 4 & -6\end{array}\right] \cdot\left[\begin{array}{ccc}2 & -2 & 2 \\ -2 & 0 & -3\end{array}\right]$

[Jawaban] Simplify $15-3(6-4)$ A) 9 B) 3 C) 24 D) 68

[Jawaban] Which number line represents the solution of [tex]x+3\ \textgreater \ 2[/tex]? A) B) C) D)

[Jawaban] What is the greatest common factor of the polynomial below? [tex]$18 x^3-6 x$[/tex] A. [tex]$6 x^2$[/tex] B. [tex]$3 x$[/tex] C. [tex]$3 x^2$[/tex] D. [tex]$6 x$[/tex]

[Jawaban] Find the equation of the line parallel to [tex]y=4 x+1[/tex] that includes the point ( $-2,-5$ ). Give your answer in Point-Slope Form. [tex]y-[?]=\square(x-\square)[/tex]

[Jawaban] The table shows the relationship between the number of trucks filled with mulch $(x)$ and the number of tons of mulch $(y)$ delivered by a landscaping company. Which regression equation models the data? A. $y=4.8 x+3$ B. $y=3 x+4.8$ C. $y=x+20.8$ D. $y=20.8 x+1$ \begin{tabular}{|c|c|c|c|} \hline $x$ & $y$ & $x ^2$ & $x y$ \\ \hline 1.5 & 9.5 & 2.25 & 14.25 \\ \hline 3 & 17 & 9 & 51 \\ \hline 5.5 & 34.5 & 30.25 & 189.75 \\ \hline 6.25 & 31 & 39.06 & 193.75 \\ \hline 7 & 35 & 49 & 245 \\ \hline$\sum x \sim$ & \begin{tabular}{c} $\sum y \sim$ 127 \end{tabular} & \begin{tabular}{c} $\sum x^2 \sim$ 129.56 \end{tabular} & \begin{tabular}{c} $\sum x y \sim$ 693.75 \end{tabular} \\ \hline \end{tabular}

[Jawaban] $\frac{-3}{8}+\frac{1}{8}=$ F. $\frac{1}{4}$ G. $-\frac{1}{4}$ H. $-\frac{1}{2}$ J. $\frac{1}{2}$ K. None of these

[Jawaban] A student solved the equation below by graphing. [tex]$\log _6(x-1)=\log _2(2 x+2)$[/tex] Which statement about the graph is true? A. The curves do not intersect. B. The curves intersect at one point. C. The curves intersect at two points. D. The curves appear to coincide.