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Questions in mathematics

[Done] Given $h(x)=-2x+5$, solve for $x$ when $h(x)=3$.

[Done] Express the given fraction as a percent. [tex]\frac{3}{10}[/tex] [tex]\frac{3}{10} =[/tex] $\square$ %

[Done] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Done] Work out $1 \frac{4}{7} \times 6$ Give your answer as a fraction in its lowest terms.

[Done] A relative frequency table is made from data in a frequency table. Frequency Table \begin{tabular}{|c|c|c|c|} \hline & U & V & Total \\ \hline S & 5 & 8 & 13 \\ \hline T & 4 & 2 & 6 \\ \hline Total & 9 & 10 & 19 \\ \hline \end{tabular} Relative Frequency Table \begin{tabular}{|c|c|c|c|} \hline & U & V & Total \\ \hline & $\ldots$ & $\ldots$ & $\ldots$ \\ \hline \end{tabular} What is the value of $k$ in the relative frequency table? Round the answer to the nearest percent. A. $2 \%$ B. $11\%$ C. $20 \%$ D. $33 \%

[Done] Conversion factor: 1 pound = 0.4536 kg 1 meter = 100 centimeters Convert: 10 pounds to kilograms. 325 centimeters to meters.

[Done] Consider the following number line: <------------------M------------------G------------------> 0 3 10 Find the location (or coordinate) of the point B if M is the midpoint of BG.

[Done] Use an appropriate permutations formula to solve. How many arrangements can be made using four of the letters of the word NUMBER if no letter is to be used more than once? Arrangements (Type a whole number.)

[Done] An airline uses many different types of airplanes. Information regarding some of the airplanes is given in the table below. | Plane | Number of Seats | Seat Width (Inches) | Wi-Fi | First-Class Seats? | | ----------- | --------------- | ------------------- | ----- | -------------------- | | SkyBus 280 | 120 | 20.3 | no | no | | SkyBus 580 | 225 | 20.6 | yes | yes | | Grigson A-2 | 70 | 19.9 | no | no | | Grigson A-5 | 130 | 20.5 | yes | no | | SkyDancer | 350 | 20.2 | yes | yes | Which of the variables is a continuous variable? A. number of seats B. seat width C. Wi-Fi

[Done] Factor. $x^2-11 x+18$ $(x-2)(x+9)$ $(x-9)(x-2)$ $(x+2)(x+9)$ $(x-9)(x+2)$