 Recent questions in Precalculus Sinead Mcgee 2020-10-31

### Factor the polynomial. ${r}^{4}–81$ Albarellak 2020-10-28

### Find a polynomial with integer coefficients that satisfies the given conditions. Q has degree 3 and zeros 0 and i. Brennan Flores 2020-10-28

### Solve it please ${7}^{2}=?$ midtlinjeg 2020-10-28

### Consider the three following matrices: Calculate the Tr(ABC) (a)1 (b)2 (c)2i (d)0 glasskerfu 2020-10-28

### Find the gradient vector field $\stackrel{\to }{F}=\mathrm{\nabla }f$ for each of the function $f\left(x,y,z\right)=\sqrt{{x}^{2}+{y}^{2}+{z}^{2}}$ tinfoQ 2020-10-27

### For each of the pairs of matrices that follow, determine whether it is possible to multiply the first matrix times the second. If it is possible, perform the multiplication. $\left[\begin{array}{ccc}1& 4& 3\\ 0& 1& 4\\ 0& 0& 2\end{array}\right]\left[\begin{array}{cc}3& 2\\ 1& 1\\ 4& 5\end{array}\right]$ sanuluy 2020-10-27

### A population of N =16 scores has a mean of p = 20, After one score is removed from the population, the new mean is found to be $\mu =19$. What is the value of ine score that was removed? (Hint: Compare the val- ues for X before and after the score was removed.) waigaK 2020-10-27

### Decide whether the composite functions, $f\circ g$ and $g\circ f$, are equal to x. $f\left(x\right)={x}^{3}+9$ $g\left(x\right)=\sqrt{x-9}$ shadsiei 2020-10-27

### Solve the polynomial inequality graphically. $2{x}^{3}-5{x}^{2}-x+6>0$ Cabiolab 2020-10-27

### Let Find each result. 3A+2B=? A-3B=? sagnuhh 2020-10-27

### Formulate the method for adding partitioned matrices, and verify your method by partitioning the matrices in two different ways and finding their sum. Nannie Mack 2020-10-27

### Find two different $2×2$ matrices A such that ${A}^{2}=O$ . Wierzycaz 2020-10-27

### If possible, find scalars so that ${c}_{1}\left[\begin{array}{c}1\\ 2\\ -3\end{array}\right]+{c}_{2}\left[\begin{array}{c}-1\\ 1\\ 1\end{array}\right]+{c}_{3}\left[\begin{array}{c}-1\\ 4\\ -1\end{array}\right]=\left[\begin{array}{c}2\\ -2\\ 3\end{array}\right]$ Burhan Hopper 2020-10-26

### Determine whether A is similar B .If $A\sim B$, give an invertible matrix P such that ${P}^{-1}AP=B$ $A=\left[\begin{array}{ccc}1& 1& 0\\ 0& 1& 1\\ 0& 0& 1\end{array}\right],B=\left[\begin{array}{ccc}1& 1& 0\\ 0& 1& 0\\ 0& 0& 1\end{array}\right]$ midtlinjeg 2020-10-26

### Find a family of the matrices that is similar to the matrix $Q=\left[\begin{array}{cc}p& -2\\ 4& -3\end{array}\right]$ ka1leE 2020-10-26

### obtain a single matrix whose column space has $B=\left(1,1,0,0\right),\left(9,1,0,1\right)$ Lipossig 2020-10-26

### Use the matrix P to determine if the matrices A and A nicekikah 2020-10-26

### Find DA and AD , if possible , where $D={D}_{g}\left(3,0,2,-1\right)$ and A is given matrix. $A=\left[\begin{array}{cccc}2i& 0& 1& 3i\\ 0& 1+i& 8& 0\\ -i& 1& 0& i\\ 1& 1& 1& 1\end{array}\right]$ Cabiolab 2020-10-25 nicekikah 2020-10-25