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Questions in mathematics

📝 Answered - Austin is mailing packages. Each small package costs him $2.80 to send. Each large package costs him $3.90. How much will it cost him to send 1 small package and 3 large packages?

📝 Answered - Solve for $y$, given: $\begin{array}{c} y-5=1(x+2) \\ y=1 x+7 \times \end{array}$

📝 Answered - Jack wrote the number [tex]$4,325,000$[/tex] in scientific notation. Choose the answer that correctly shows his number in scientific notation. (A) [tex]$4.325 \times 10^6$[/tex] (B) [tex]$4.325 \times 10^{-6}$[/tex] (C) [tex]$4.325 \times 10^3$[/tex] (D) [tex]$43.25 \times 10^4$[/tex]

📝 Answered - As you listen to the presentations of your classmates, remember the criteria for audience members. Audience members: Give their full attention and respect to the presenter. Take notes, as needed. Are prepared to summarize the presenters' mathematical argument or strategy. Ask clarifying questions. Are prepared to make connections between the presenters' ideas and their own ideas. Use this space to take notes.

📝 Answered - $11 \div \frac{4}{3}

📝 Answered - A polynomial function has a root of -7 with multiplicity 2, a root of -1 with multiplicity 1, a root of 2 with multiplicity 4, and a root of 4 with multiplicity 1. If the function has a positive leading coefficient and is of even degree, which statement about the graph is true? The graph of the function is positive on $(2,4)$. The graph of the function is negative on $(4, \infty)$. The graph of the function is positive on ($-\infty,-7$). The graph of the function is negative on $(-7,-1)$.

📝 Answered - Given $y=\frac{x}{x^2+2}$. Find $y^{\prime}$ and $y^{\prime \prime}$. $y^{\prime}=$ $\square$ $y^{\prime \prime}=$ $\square$

📝 Answered - What is the solution to this equation? [tex]$\ln (x+6)-\ln (2 x-1)=0$[/tex] A. [tex]$x=-7$[/tex] B. [tex]$x=5$[/tex] C. [tex]$x=7$[/tex] D. [tex]$x=-5$[/tex]

📝 Answered - [tex]\frac{21+3^5 \div 9}{75-(7+2)^2}[/tex]

📝 Answered - Select all the correct answers. Which functions have a range of [tex]$\left\{y \in R \mid-\infty\ \textless \ y\ \textless \ \infty\right\}$[/tex]? [tex]$f(x)=2^{x+3}$[/tex] [tex]$f(x)=-4 x+11$[/tex] [tex]$f(x)=-(x+1)^2-4$[/tex] [tex]$f(x)=\frac{2}{3} x-8$[/tex] [tex]$f(x)=x^2+7 x-9$[/tex]