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Questions in mathematics

[Answered] Evaluate [tex]x^2[/tex] when [tex]x=-3.1[/tex]

[Answered] Evaluate the following algebraic expression at [tex]x=-2, y:=-7, z=4[/tex] and simplify your answer. [tex]\frac{-5 x+y}{-2 z}[/tex]

[Answered] Subtract: $\left(-3 x^7-11 u\right)-2 x^7$ Your answer should be in simplest terms.

[Answered] Rewrite the following numbers including commas where appropriate: a. 4321 b. 54321 c. 224466 d. 2224466 e. 10010011001 Solve each expression. Record your answer in standard form. | Expression | | -- | | 4 tens +6 tens | | 8 hundreds +2 hundreds | | ten millions +7 ten millions | Represent each addend with place value disks in the place value chart. Show the composition from 10 smaller units. Write the sum in standard form. thousands +12 hundreds =

[Answered] Select the correct answer. Which exponential equation is equivalent to this logarithmic equation? [tex]$\log x=4$[/tex] A. [tex]$10^4=x$[/tex] B. [tex]$10^x=4$[/tex] C. [tex]$e ^x=4$[/tex] D. [tex]$e^4=x$[/tex]

[Answered] Express 4592.3 to two significant figures.

[Answered] Match each equation to its solution. [tex]x=6[/tex] [tex]x=-5[/tex] [tex]x=-7[/tex] \begin{tabular}{|l|l|l|} \hline [tex]4.5 x-7=20[/tex] & & \\ \hline [tex]-3 x+7=28[/tex] & & \\ \hline [tex]2 x+3=-7[/tex] & & \\ \hline \end{tabular}

[Answered] Calculate $6 \frac{6}{4} \% \operatorname{tax}$ on $2,305. a. $ 15.56 b. $ 145.22 c. $ 146.14 d. $ 155.59

[Answered] Aidan drives to school and back each day. The school is 16 miles from his home. He averages 40 miles per hour on his way to school. If his total trip takes 1 hour, at approximately what average speed does Aidan drive home?

[Answered] Subtract: $\left(-7 b^2-12\right)-\left(-10 b^2-4\right)$ Your answer should be in simplest terms.