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Questions in Grade College

📝 Answered - Solve. $\begin{array}{l} -9 x+3 y=12 \\ 9 x-5 y=-2 \end{array}$

📝 Answered - Write 2 equivalent ratios for the ratio below: 22:33

📝 Answered - I was ... ... the train times. It leaves at 16.30

📝 Answered - Large radioactive atoms decay into smaller atoms by releasing alpha particles. Each alpha particle has 2 protons, 2 neutrons, and 0 electrons. The table below describes several neutral, low-mass atoms. \begin{tabular}{|l|l|l|l|} \hline \multicolumn{4}{|c|}{ Stable Isotopes of Low-Mass Elements } \\ \hline Element Name & Symbol & \begin{tabular}{l} Atomic \\ Number \end{tabular} & \begin{tabular}{l} Number of \\ Neutrons \end{tabular} \\ \hline Hydrogen & H & 1 & 0 \\ \hline Helium & He & 2 & 2 \\ \hline Lithium & Li & 3 & 4 \\ \hline Berylium & Be & 4 & 5 \\ \hline \end{tabular} An alpha particle is also referred to as a nucleus of which isotope? A. lithium-7 B. helium-4

📝 Answered - The first two steps in the derivation of the quadratic formula by completing the square are: Step 1: [tex]$a x^2+b x+c=0$[/tex] Step 2: [tex]$a x^2+b x=-c$[/tex] Which answer choice shows the correct next step? A. [tex]$a x+b=\frac{-c}{x}$[/tex] B. [tex]$a x^2+b x+\frac{b^2}{4}=-c+\frac{b^2}{4}$[/tex] C. [tex]$x^2+\frac{b}{a} x=\frac{-c}{a}$[/tex] D. [tex]$x^2+\frac{b}{a} x=-c$[/tex]

📝 Answered - The four diagonals of a cube are drawn to create 6 square pyramids with the same base and height. The volume of the cube is $(b)(b)(b)$. The height of each pyramid is $h$. Therefore, the volume of one pyramid must equal one-sixth the volume of the cube, or A. $\frac{1}{6}(b)(b)(2 h)$ or $\frac{1}{3} B h$. B. $\frac{1}{6}(b)(b)(6 h)$ or $B h$. C. $\frac{1}{3}(b)(b)(6 h)$ or $\frac{1}{3} B h$. D. $\frac{1}{3}(b)(b)(2 h)$ or $\frac{2}{3} B h$.

📝 Answered - Circle the adjective in the sentence. I broke the yellow pencil.

📝 Answered - Evaluate [tex]$-a^2-2 b c-|c|$[/tex] if [tex]$a=-2, b=3$[/tex], and [tex]$c=-3$[/tex].

📝 Answered - Which elements does strong narrative writing always contain? Check all that apply. A. a connection to an outline B. a series of steps C. a clear point of view D. a set of directions E. a description of events

📝 Answered - Draw the number line model and find the quotient [tex]$5 \div \frac{2}{3}$[/tex]