Precalculus Solutions | Expert Assistance for Problems & Examples

Suppose that a batch of 100 items contains 6 that are defective and 94 that are non-defective. If X is the number of defective items in a randomly drawn sample of 10 items, find (a)P{X = 0} and (b) P {X > 2}.

floymdiT 2021-01-19

These three points are on the same line: (1,2,3),(2,4,−6),(−3,−6,x). Find x. Explain your answer fully.

ruigE 2021-01-19

Factor the trinomial. Note that the coefficient of $x^{2}$ is not equal to 1. $4 x^{2} - 3 x = 10 .$

foass77W 2021-01-19

Suppose the alphabet consists of just {a,b,c,d,e}. Consider strings of letters that show repetitions. How many 4-letter strings are there that do not contain “aa"?

Brittney Lord 2021-01-19

The next number in the series 13, 18, 16, 21, 19

avissidep 2021-01-17

Find the inverse of the matrix using elementary matrices. $[[2, 0], [1, 1]]$

Tazmin Horton 2021-01-17

In the example problem, $2.4 x 10^{6}$ was rewritten as $24 x 10^{5}$ . Explain why those expressions are equivalent.

texelaare 2021-01-17

Let V be the vector space of real 2 x 2 matrices with inner product
$(A | B) = t r (B^{t} A)$ .
Let U be the subspace of V consisting of the symmetric matrices. Find an orthogonal basis for $U^{⊥}$ where $U^{⊥} {A \in V | (A | B) = 0 \forall B \in U}$

beljuA 2021-01-16

Let W be the vector space of $3 \times 3$ symmetric matrices , $A \in W$ Then , which of the following is true ?
a) $A^{T} = 1$
b) $d i m W = 6$
c) $A^{- 1} = A$
d) $A^{- 1} = A^{T}$

Yulia 2021-01-16

Sketch a graph of the function. Use transformations of functions when ever possible. $f (x) = \sqrt{3} {- x}$

Josalynn 2021-01-16

A car dealership offers a $1300 rebate and a 15% discount off the price of a new car. Let p be the sticker price of a new car on the dealers

foass77W 2021-01-16

Your friend claims that rotating a figure by 180° is the same as reflecting a figure in the y-axis and then reflecting it in the x-axis. Is your friend correct? Explain your reasoning.

necessaryh 2021-01-15

write B as a linear combination of the other matrices, if possible.
$B = [\begin{matrix} 2 & 5 \\ 0 & 3 \end{matrix}], A_{1} = [\begin{matrix} 1 & 2 \\ - 1 & 1 \end{matrix}], A_{2} = [\begin{matrix} 0 & 1 \\ 2 & 1 \end{matrix}]$

abondantQ 2021-01-15

Subject: matrices
Determine:
$[\begin{matrix} 1 & - 1 & 2 \end{matrix}] {[\begin{matrix} 4 \\ - 1 \\ 0 \end{matrix}] [\begin{matrix} 2 & 3 \end{matrix}] + [\begin{matrix} 1 & 0 \\ 0 & 1 \\ - 1 & - 1 \end{matrix}]}$

arenceabigns 2021-01-15

Solve: $\frac{1}{3} (6 b + 4)$

ediculeN 2021-01-13

Mark each of the following statement true or false: If A and B are matrices such that AB = O and $A \neq O$ , then B = O.

CheemnCatelvew 2021-01-13

True or False - Determinants of two similar matrices are the same. Explain.

Dolly Robinson 2021-01-13

Solve the equation forX, given that
$B = [\begin{matrix} a & b \\ c & d \end{matrix}]$
commutes with both $[\begin{matrix} 1 & 0 \\ 0 & 0 \end{matrix}]$ and $[\begin{matrix} 0 & 0 \\ 0 & 1 \end{matrix}]$

ediculeN 2021-01-13

Determine which matrices are in reduced echelon form and which others are only in echelon form.
a) $[\begin{matrix} 1 & 0 & 1 & 0 \\ 0 & 1 & 1 & 0 \\ 0 & 0 & 0 & 1 \end{matrix}]$
b) $[\begin{matrix} 0 & 1 & 1 & 1 & 1 \\ 0 & 0 & 1 & 1 & 1 \\ 0 & 0 & 0 & 0 & 1 \\ 0 & 0 & 0 & 0 & 0 \end{matrix}]$
c) $[\begin{matrix} 1 & 5 & 0 & 0 \\ 0 & 0 & 1 & 0 \\ 0 & 0 & 0 & 0 \\ 0 & 0 & 0 & 1 \end{matrix}]$

Carol Gates 2021-01-13

write B as a linear combination of the other matrices, if possible.
$B = [[2, - 2, 3], [0, 0, - 2], [0, 0, 2]]$
$A_{1} = [[1, 0, 0], [0, 1, 0], [0, 0, 1]]$
$A_{2} = [[0, 1, 1], [0, 0, 1], [0, 0, 0]]$
$A_{3} = [[- 1, 0, - 1], [0, 1, 0], [0, 0, - 1]]$
$A_{4} = [[1, - 1, 1], [0, - 1, - 1], [0, 0, 1]]$

Precalculus problems and solutions are hard to find online even though this topic is quite popular among college students majoring in Engineering. Keeping this fact in mind, we decided to provide you with a list of questions and answers that will help you with various precalculus problems. Regardless if it is related to equations or any other problem, these precalculus problems and composite functions examples and solutions below will help you see the logic and compare solutions as you check your original task.

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