GuideFoot - Learn Together, Grow Smarter. Logo

Questions in Grade High-school

📝 Answered - A flask contains an acidic solution with a concentration of $7.1 \times 10^{15}$ hydrogen ions per milliliter. If $4.8 \times 10^{23}$ hydrogen ions have a total mass of 0.8 grams, which of the following is closest to the concentration, in grams per liter, of the acidic solution? (A) $1.2 \times 10^{-5}$ (B) $1.2 \times 10^{-8}$ (C) $1.5 \times 10^{-5}$ (D) $1.5 \times 10^{-8}$

📝 Answered - The standard form of the equation of a parabola is $x=y^2+6 y+1$. What is the vertex form of the equation? A. $x=(y+6)^2-11$ B. $x=(y+3)^2-5$ C. $x=(y+3)^2-8$ D. $x=(y+6)^2-35$

📝 Answered - Select all the correct locations on the graph. Consider the given piecewise function. [tex]f(x)=\left\{\begin{array}{ll} -(3 x+7) ; & x\ \textless \ -3 \\ 2 x^2-16 ; & -3 \leq x \leq 3 \\ -\left(2^x-10\right) ; & x\ \textgreater \ 3 \end{array}\right.[/tex] Select the section(s) of the graph where the function is decreasing.

📝 Answered - What is the factorization of the trinomial below? [tex]$-2 x^3+2 x^2+12 x$[/tex] A. [tex]$2 x(x^2+3)(x+2)$[/tex] B. [tex]$-2 x(x+3)(x-2)$[/tex] C. [tex]$-2 x(x+3)(x+2)$[/tex] D. [tex]$-2 x(x-3)(x+2)$[/tex]

📝 Answered - Which of the following circles lie completely within the third quadrant? Check all that apply. A. $(x+7)^2+(y+7)^2=4$ B. $(x+3)^2+(y+9)^2=82$ C. $(x+12)^2+(y+9)^2=9$ D. $(x+5)^2+(y+0)^2=7

📝 Answered - Fill in the gaps to balance the equation. Use the smallest set of whole numbers to balance the equation and include coefficients of "1" when appropriate. [tex]\square K_2 SiO_3+\square CoF_2 \rightarrow \square KF+\square CoSiO_3[/tex] Complete the table to determine how many atoms of each element are present in the reactants and products. | Element | Reactant | Products | | :------ | :------- | :------- | | K | | | | Si | | | | O | | | | CO | | | | F | | |

📝 Answered - What's the least common denominator of [tex]$3 / 4, 4 / 5$[/tex], and [tex]$2 / 3$[/tex]? A) 20 B) 60 C) 12

📝 Answered - Line $GH$ passes through points $(2,5)$ and $(6,9)$. Which equation represents line $GH$? A. $y=x+3$ B. $y=x-3$ C. $y=3x+3$ D. $y=3x-3$

📝 Answered - $3 \leqslant 4 x-1<5$

📝 Answered - In a given chemical reaction, the energy of the products is greater than the energy of the reactants. Which statement is true for this reaction? A. Energy is absorbed in the reaction. B. Energy is released in the reaction. C. No energy is transferred in the reaction. D. Energy is created in the reaction. E. Energy is lost in the reaction.