Questions in mathematics

Questions in mathematics

📝 Answered - Jack intends to purchase a shirt that was originally marked $[tex]$35$[/tex] but is now [tex]$30 \%$[/tex] off. Write a linear expression for the new cost of the shirt. Then, calculate the sale price of it. A) $[tex]$c-0.30 c, $24.50$[/tex] B) $[tex]$c-0.35 c, $22.75$[/tex] C) $[tex]$c-0.30 c, $22.75$[/tex] D) $[tex]$c-3.5 c, $22.75$[/tex]

📝 Answered - Which statement describes the graph of [tex]f(x)=-4 x^3-28 x^2-32 x+64[/tex]? The graph crosses the [tex]x[/tex]-axis at [tex]x=4[/tex] and touches the [tex]x[/tex]-axis at [tex]x=-1[/tex]. The graph touches the [tex]x[/tex]-axis at [tex]x=4[/tex] and crosses the [tex]x[/tex]-axis at [tex]x=-1[/tex]. The graph crosses the [tex]x[/tex]-axis at [tex]x=-4[/tex] and touches the [tex]x[/tex]-axis at [tex]x=1[/tex]. The graph touches the [tex]x[/tex]-axis at [tex]x=-4[/tex] and crosses the [tex]x[/tex]-axis at [tex]x=1[/tex].

📝 Answered - if [tex]A=\left[\begin{array}{ll}2 & 3 \\ 10 & 15\end{array}\right][/tex] and [tex]B\left[\begin{array}{ll}4 & 7 \\ 8 & 24\end{array}\right][/tex] find [tex]A+B[/tex], [tex]A-B[/tex], [tex]2A+3B[/tex].

📝 Answered - $f(x)=3 x^2+5 x+6$ (i) $f^{\prime}(0)$ (ii) $f^{\prime \prime}(1)$

📝 Answered - Solve the equation. a. $-2(5x-1)=2x-6$

📝 Answered - Challenge: Amy is laying tiles in her rectangular bathroom. By the time she has finished, she has used [tex]$8 m^2$[/tex] worth of tiles. She knows the length of one side of the room is [tex]$(\sqrt{5}+2) m$[/tex] but, unfortunately, she has lost her tape measure. Amy still needs to work out the perimeter of the room. Calculate the perimeter of the room, giving your answer in its simplest form.

📝 Answered - Which line is perpendicular to a line that has a slope of [tex]$\frac{1}{2}$[/tex]? line AB line CD line FG line HJ

📝 Answered - Dad se recegen 250,000 Kilos de basura en un $\begin{array}{r} 3 . 250.000 \times \quad 365 \hline 1250.000 75000.00 750000.0 \hline 760250000 \end{array}$

📝 Answered - Solve the given compound inequality. Present your answer in interval notation. [tex]11 \leq 4 y+3<23[/tex] The solution set is: $\square$

📝 Answered - The formula $s=\sqrt{\frac{S A}{6}}$ gives the length of the side, $s$, of a cube with a surface area, $S A$. How much longer is the side of a cube with a surface area of 180 square meters than a cube with the surface area of 120 square meters? A. $\sqrt{30}-4 \sqrt{5} m$ B. $\sqrt{30}-2 \sqrt{5} m$ C. $\sqrt{10} m$ D. $2 \sqrt{15} m$