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Questions in Grade High-school

📝 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]$\square$ RbBr + $\square$ HNO _3 \rightarrow $\square$ RbNO _3+ $\square$ HBr[/tex] Complete the table to determine how many atoms of each element are present in the reactants and products. | Element | Reactant | Products | | :------ | :------- | :------- | | Rb | $\square$ | $\square$ | | Br | $\square$ | $\square$ | | H | $\square$ | $\square$ | | N | $\square$ | $\square$ | | O | $\square$ | $\square$

📝 Answered - Select the correct answer. Over which interval of the domain is function [tex]$h$[/tex] decreasing? [tex]$h(x)=\left\{\begin{array}{ll} 2^x, & x\ \textless \ 1 \\ \sqrt{x+3}, & x \geq 1 \end{array}\right.$[/tex] A. [tex]$(-\infty, 1)$[/tex] B. The function is increasing only. C. [tex]$(1, \infty)$[/tex] D. [tex]$(-\infty, \infty)$[/tex]

📝 Answered - Calculate the problem for me

📝 Answered - In factoring a trinomial with a leading coefficient other than 1, the first step is to look for a common factor in each term and factor it out. A. True B. False

📝 Answered - If -1 is a root of [tex]f(x)[/tex], which of the following must be true? A. A factor of [tex]f(x)[/tex] is [tex](x-1)[/tex]. B. A factor of [tex]f(x)[/tex] is [tex](x+1)[/tex]. C. Both [tex](x-1)[/tex] and [tex](x+1)[/tex] are factors of [tex]f(x)[/tex]. D. Neither [tex](x-1)[/tex] nor [tex](x+1)[/tex] is a factor of [tex]f(x)[/tex].

📝 Answered - Which nutrient is so vital to health that you wouldn't live more than a few days without it? A. protein B. water C. vitamins D. minerals

📝 Answered - Europeans ignored cultural divisions when setting colonial boundaries because: A. Europeans had no interest in or concern for African cultural divisions. B. African cultural divisions were too complex for Europeans to understand. C. Respecting African cultural identity might negatively affect Africa's economy. D. African citizens did not have a strong sense of national or cultural identity.

📝 Answered - A company plans to sell bicycle helmets for $26 each. The company's business manager estimates that the cost, y, of making x helmets is a quadratic function with a y-intercept of 8,400 and a vertex of (500, 15,900). x = number of helmets y = amount in dollars How many helmets must the company make and sell to break even? How much will it cost the company to make 600 helmets? Which system models this situation? $\begin{array}{l} y=26 x \text { and } y=8,400(x-500)^2+15,900 \\ y=26 x \text { and } y=-0.030(x-500)^2+15,900 \\ y=x / 26 \text { and } y=-0.030(x-500)^2+15,900 \\ y=x / 26 \text { and } y=8,400(x-500)^2+15,900\end{array}$

📝 Answered - Select the correct answer. Which source is a primary Internet source? A. a textbook about biology B. a news article about the events of September 11, C. a blog entry about your summer break D. a magazine article about Mormon pioneers

📝 Answered - The graph of the function [tex]f(x)=x^2+8 x+12[/tex] is shown. Which statements describe the graph? Check all that apply. A. The vertex is the maximum value. B. The axis of symmetry is [tex]x=-4[/tex]. C. The domain is all real numbers. D. The range is all real numbers. E. The function is increasing over ([tex]-\infty,-4[/tex]). F. The [tex]x[/tex]-intercepts are at [tex](-6,0)[/tex] and [tex](-2,0)[/tex].