Contemporary Mathematics for Business and Consumers
7th Edition
ISBN: 9781285189758
Author: Robert Brechner, George Bergeman
Publisher: Cengage Learning
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Chapter 15, Problem 8AT
For the month of January. Consolidated Engine Pans. Inc. had the following financial information: merchandise inventory. January 1, $322,000; merchandise inventory, January 31, $316,400; gross purchases. $243,460; purchase returns and allowances. $26,880; and freight in, $3,430.
a. What are Consolidated's goods available for sale?
b. What is the cost of goods sold for January?
c. If net sales were $389,450, what was the gross margin for January?
d. If total operating expenses were $179,800. what was the net profit or loss?
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Question 3
over a field K.
In this question, MË(K) denotes the set of n × n matrices
(a) Suppose that A Є Mn(K) is an invertible matrix. Is it always true that A is
equivalent to A-¹? Justify your answer.
(b) Let B be given by
8
B = 0 7 7
0 -7 7
Working over the field F2 with 2 elements, compute the rank of B as an element
of M2(F2).
(c) Let
1
C
-1 1
[4]
[6]
and consider C as an element of M3(Q). Determine the minimal polynomial
mc(x) and hence, or otherwise, show that C can not be diagonalised.
[7]
(d) Show that C in (c) considered as an element of M3(R) can be diagonalised. Write
down all the eigenvalues. Show your working.
[8]
16. Solve the given differential equation:
y" + 4y sin (t)u(t 2π),
-
y(0) = 1, y'(0) = 0
Given,
1
(x² + 1)(x²+4)
1/3
-1/3
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R denotes the field of real numbers, Q denotes the field of rationals, and
Fp denotes the field of p elements given by integers modulo p. You may refer to general
results from lectures.
Question 1
For each non-negative integer m, let R[x]m denote the
vector space consisting of the polynomials in x with coefficients in R and of degree ≤ m.
x²+2, V3 = 5. Prove that (V1, V2, V3) is a linearly independent
(a) Let vi = x, V2 =
list in R[x] 3.
(b) Let V1, V2, V3 be as defined in (a). Find a vector v € R[×]3 such that (V1, V2, V3, V4)
is a basis of R[x] 3.
[8]
[6]
(c) Prove that the map ƒ from R[x] 2 to R[x]3 given by f(p(x)) = xp(x) — xp(0) is a
linear map.
[6]
(d) Write down the matrix for the map ƒ defined in (c) with respect to the basis
(2,2x + 1, x²) of R[x] 2 and the basis (1, x, x², x³) of R[x] 3.
[5]
Chapter 15 Solutions
Contemporary Mathematics for Business and Consumers
Ch. 15.I - Use the following financial information to prepare...Ch. 15.I - Prob. 2TIECh. 15.I - Prob. 3TIECh. 15.I - Prob. 1RECh. 15.I - Prob. 2RECh. 15.I - Prob. 3RECh. 15.I - Prob. 4RECh. 15.I - Prob. 5RECh. 15.I - Prob. 6RECh. 15.I - Calculate the following values according to the...
Ch. 15.I - Prob. 8RECh. 15.I - Calculate the missing balance sheet items for...Ch. 15.I - Prob. 10RECh. 15.I - Prob. 11RECh. 15.I - Prob. 12RECh. 15.I - Prob. 13RECh. 15.I - For the following balance sheet items, check the...Ch. 15.I - For the following balance sheet items, check the...Ch. 15.I - Prob. 16RECh. 15.I - Prob. 17RECh. 15.I - Prob. 18RECh. 15.I - Prob. 19RECh. 15.I - Prob. 20RECh. 15.I - Prob. 21RECh. 15.I - For the following balance sheet items, check the...Ch. 15.I - Prob. 23RECh. 15.I - Prob. 24RECh. 15.I - Prob. 25RECh. 15.I - For the following balance sheet items, check the...Ch. 15.I - Prob. 27RECh. 15.I - Prob. 28RECh. 15.I - Prob. 29RECh. 15.I - Prob. 30RECh. 15.I - Prob. 31RECh. 15.I - Prob. 32RECh. 15.I - Prob. 33RECh. 15.I - Prepare the following statements on separate...Ch. 15.I - a. Use the following financial information to...Ch. 15.II - Prob. 4TIECh. 15.II - Prob. 5TIECh. 15.II - Prob. 6TIECh. 15.II - Prob. 1RECh. 15.II - Prob. 2RECh. 15.II - Prob. 3RECh. 15.II - Prob. 4RECh. 15.II - Calculate the missing information based on the...Ch. 15.II - Prob. 6RECh. 15.II - Prob. 7RECh. 15.II - Prob. 8RECh. 15.II - Prob. 9RECh. 15.II - Prob. 10RECh. 15.II - Prob. 11RECh. 15.II - 12. For the third quarter. Micro Tech had gross...Ch. 15.II - For August, Island Traders, Inc. had the following...Ch. 15.II - Prepare the following statements on separate...Ch. 15.II - Prepare the following statements on separate...Ch. 15.III - Use the balance sheet and income statement on...Ch. 15.III - Prob. 8TIECh. 15.III - Prob. 1RECh. 15.III - Prob. 2RECh. 15.III - Prob. 3RECh. 15.III - Prob. 4RECh. 15.III - Prob. 5RECh. 15.III - Prob. 6RECh. 15.III - Prob. 7RECh. 15.III - Prob. 8RECh. 15.III - Prob. 9RECh. 15.III - Prob. 10RECh. 15.III - Prob. 11RECh. 15.III - Prob. 12RECh. 15.III - Prob. 13RECh. 15.III - Prob. 14RECh. 15.III - Calculate the average inventory and inventory...Ch. 15.III - Prob. 16RECh. 15.III - Prob. 17RECh. 15.III - Prob. 18RECh. 15.III - Prob. 19RECh. 15.III - Prob. 20RECh. 15.III - Prob. 21RECh. 15.III - Prob. 22RECh. 15.III - Prob. 23RECh. 15.III - Prob. 24RECh. 15.III - Calculate the gross and net profits and the two...Ch. 15.III - Prob. 26RECh. 15.III - Prob. 27RECh. 15.III - Prob. 28RECh. 15.III - Prob. 29RECh. 15.III - Prob. 30RECh. 15.III - Prob. 31RECh. 15.III - Prob. 32RECh. 15.III - Prob. 33RECh. 15 - 1. In accounting, economic resources owned by a...Ch. 15 - 2. The financial statement that illustrates the...Ch. 15 - 3. The balance sheet is a visual presentation of...Ch. 15 - Prob. 4CRCh. 15 - 5. A financial statement prepared with the data...Ch. 15 - Prob. 6CRCh. 15 - Prob. 7CRCh. 15 - Prob. 8CRCh. 15 - Prob. 9CRCh. 15 - Prob. 10CRCh. 15 - Prob. 11CRCh. 15 - Prob. 12CRCh. 15 - Prob. 13CRCh. 15 - Prob. 14CRCh. 15 - Prob. 1ATCh. 15 - Prob. 2ATCh. 15 - Prob. 3ATCh. 15 - Prob. 4ATCh. 15 - a. Use the following financial information to...Ch. 15 - a. Use the following financial information to...Ch. 15 - For the second quarter. Evergreen Plant Nursery...Ch. 15 - 8. For the month of January. Consolidated Engine...Ch. 15 - Prob. 9ATCh. 15 - a. Use the following financial information to...Ch. 15 - As the accounting manager of Spring Creek...Ch. 15 - As the accounting manager of Spring Creek...Ch. 15 - As the accounting manager of Spring Creek...Ch. 15 - As the accounting manager of Spring Creek...Ch. 15 - As the accounting manager of Spring Creek...Ch. 15 - As the accounting manager of Spring Creek...Ch. 15 - As the accounting manager of Spring Creek...Ch. 15 - As the accounting manager of Spring Creek...Ch. 15 - As the accounting manager of Spring Creek...Ch. 15 - As the accounting manager of Spring Creek...Ch. 15 - As the accounting manager of Spring Creek...Ch. 15 - Prob. 22ATCh. 15 - Prob. 23ATCh. 15 - 24. From the following consolidated statements of...
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