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Questions in mathematics

[Done] Write $\sqrt{2 \frac{2}{9}}$ in the form $\frac{p}{q} \sqrt{r}$ where $p$ and $q$ and $r$ are integers.

[Done] Choose the correct simplification of $\left(7 x^3-8 x-5\right)+\left(3 x^3+7 x+1\right)$. A. $10 x^3-x-4$ B. $10 x^3+x+4$ C. $4 x^3-15 x-6$ D. $4 x^3+15 x+6$

[Done] Divide, expressing the quotient in scientific notation. $\frac{2.4 \times 10^8}{5 \times 10^{-6}}$

[Done] Evaluate the limit $\lim _{x \rightarrow \infty} \frac{\sqrt{8+3 x^2}}{(2+4 x)}$

[Done] Select the correct answer. Solve for $x$. $10(2 x-4)=100 x$ A. $x=\frac{1}{2}$ B. $x=-\frac{1}{2}$ C. $x=3$ D. $x=7$

[Done] Add: (1) 1489 + 7697 (2) 2764 + 1539 (3) 5739 + 2282 (4) 5989 + 2364 (5) 8989 + 2222 (6) 3708 + 4609 (7) 6548 + 3956 (8) 8653 + 5985 (9) 5687 + 2456 (10) 5692 + 3678 (11) 6743 + 2469 (12) 4328 + 2985 (13) 8247 + 8873 (14) 3683 + 4748 (15) 341 + 269

[Done] The heat in the house is set to keep the minimum and maximum temperatures (in degrees Fahrenheit) according to the equation $|x-72.5|=4$. What are the minimum and maximum temperatures in the house?

[Done] Type the correct answer in each box. Use numerals instead of words. If necessary, use / for the fraction bar(s). A right triangle [tex]$A B C$[/tex] has complementary angles [tex]$A$[/tex] and [tex]$C$[/tex]. If [tex]$\sin (A)=\frac{24}{25}$[/tex], the value of [tex]$\cos (C)=$\square[/tex], If [tex]$\cos (C)=\frac{20}{29}$[/tex], the value of [tex]$\sin (A)=$\square[/tex]

[Done] Sophie did an anonymous survey and collected her friends' credit scores. The scores she found are listed in the table below. What is the mean credit score in this group? (Round to the nearest whole point, if applicable.) | 682 | 601 | 744 | 674 | 701 | 790 | 676 | 638 | 773 | A. 698 B. 695 C. 676 D. 701

[Done] Write in terms of $i$. Simplify your answer as much as possible. [tex]$\sqrt{-99}$[/tex]