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Questions in Grade High-school

[Done] Solve the equation. $7 x+5=7 x+5$

[Done] $12x - (8 - 9x + 3x^2) + 6x^2

[Done] A rectangular piece of paper has a width that is 3 inches less than its length. It is cut in half along a diagonal to create two congruent right triangles with areas of 44 square inches. Which statements are true? Check all that apply. A. The area of the rectangle is 88 square inches. B. The equation [tex]$x(x-3)=44$[/tex] can be used to solve for the dimensions of the triangle. C. The equation [tex]$x^2-3 x-88=0$[/tex] can be used to solve for the length of the rectangle. D. The triangle has a base of 11 inches and a height of 8 inches. E. The rectangle has a width of 4 inches.

[Done] 4.92 grams to milligrams

[Done] Which solution to the equation [tex]$\frac{1}{x-1}=\frac{x-2}{2 x^2-2}$[/tex] is extraneous? A. [tex]$x=1$[/tex] and [tex]$x=-4$[/tex] B. neither [tex]$x=1$[/tex] or [tex]$x=-4$[/tex] C. [tex]$x=1$[/tex] D. [tex]$x=-4$[/tex]

[Done] Explain the process for determining sales tax and total purchase price.

[Done] [tex]\frac{1}{2} x-4\ \textless \ 3[/tex]

[Done] The table shows data for a car stopping on a wet road. \begin{tabular}{|c|c|} \hline$v$ & $d$ \\ \hline 20 & 38 \\ \hline 30 & 86 \\ \hline 40 & 153 \\ \hline \end{tabular} Stopping distance formula [tex]d(v)=\frac{2.15 v^2}{64.4 f}[/tex] To determine the value of [tex]f[/tex], substitute a pair of values for [tex]d[/tex] and [tex]v[/tex] into the equation and solve. Round to the nearest hundredth.

[Done] What was notable about Native Americans who lived in the Great Plains? A. Their economy was based on agriculture. B. Their economy was based on trade. C. They worshipped many gods. D. They hunted buffalo.

[Done] $4 \div(-4) \times 1-(-1)$