# High school math questions and answers

Recent questions in Secondary
America Ware 2022-05-24 Answered

### How do you solve and graph $4\ge k+3$ ?

Kendrick Pierce 2022-05-24 Answered

### How to derive $\mathrm{sin}\left(2x\right)=\frac{1}{\sqrt{1+{\mathrm{cot}}^{2}\left(2x\right)}}$?

Janiyah Huffman 2022-05-24 Answered

### How do you express intervals as inequalities such as [3,8)?

Hyus Jsjs 2022-05-23
Rohit Rawat 2022-05-23

### Find all 4 roots of the polynomial:$f\left(x\right)={x}^{4}+2{x}^{3}-x-1.$

Alani Conner 2022-05-23 Answered

### To find minimum value of $2\mathrm{csc}\left(2x\right)+\mathrm{sec}\left(x\right)+\mathrm{csc}\left(x\right)$

Case Nixon 2022-05-23 Answered

### Suppose that $x$, $y$ and $z$ are three integers (positive,negative or zero) such that we get the following relationships simultaneously1. $x+y=1-z$and2. ${x}^{3}+{y}^{3}=1-{z}^{2}$Find all such $x$, $y$ and $z$.

Janiyah Huffman 2022-05-23 Answered

### Use the identities$\mathrm{cos}2x=2{\mathrm{cos}}^{2}x-1=1-2{\mathrm{sin}}^{2}x$$\mathrm{sin}x=\mathrm{cos}\left(\frac{\pi }{2}-x\right)$to help evaluate${\int }_{0}^{\pi /2}\sqrt{1-\mathrm{sin}x}\phantom{\rule{thickmathspace}{0ex}}dx$

Nicholas Cruz 2022-05-23 Answered

### Show that every irrational number in $\mathbb{R}$ is the limit of a sequence of rational numbers. Every rational number in $\mathbb{R}$ is the limit of a sequence of irrational numbers.

Camille Flynn 2022-05-23 Answered

### How do you solve $4<13+r$

Andy Erickson 2022-05-23 Answered

### For any even $n$, say $n=2m$, a row complete Latin square of order $n$ can be formed by writing down$0,1,2m-1,2,2m-2,3,\dots ,m+1,m$as the first row and then developing subsequent rows by adding $1$ modulo $n$.I'm not quite clear on how that goes, such as what the difference is between $2m$ and $m$. $2m$ stands for $n$, does $m$ stand for modulo? I'd like to see and example with an even number or two, such as $4$, and $6$.I tried, $2m=4$$0,1,3,2,2\dots$wait, that can't be right.

Bailee Landry 2022-05-23 Answered