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Question 1208685: please help me solve:
An advertisement from the back of Denton checklist:
$1300 sofa and love seat
$1400 sofa and two chairs
$1600 sofa, love seat, one chair
HOw much does each piece of furniture cost individually?
Click here to see answer by ikleyn(52747)

Question 1208620: On the number line x= 2/9 and y= 17/18. The point z divides the segment from x to y into two parts such that the distance from x to z is 5/9 of the distance from z to y. Find the distance from z to y.
Click here to see answer by MathTherapy(10549)

Question 1208862: Tamika opened a money market account that has a 4.25% annual interest rate, compounded semiannually. She deposits $1,750. What will be the balance in the account after 15 years? Round to the nearest cent. Remember

Click here to see answer by math_tutor2020(3816)

Question 1208880: If (a + 1)(b + 1)(a + b) = 1530
and a³ + b³ = 1241
then a + b = ?
Click here to see answer by ikleyn(52747)

Question 1208880: If (a + 1)(b + 1)(a + b) = 1530
and a³ + b³ = 1241
then a + b = ?
Click here to see answer by math_tutor2020(3816)

Question 1208877: if y=e^-x^2 then y''(0) equals
Click here to see answer by mccravyedwin(405)

Question 1208973: Without graphing, find the point of intersection of the lines -x+2y=-4 and 2x+y=3
Click here to see answer by josgarithmetic(39613)

Question 1208973: Without graphing, find the point of intersection of the lines -x+2y=-4 and 2x+y=3
Click here to see answer by timofer(104)

Question 1208973: Without graphing, find the point of intersection of the lines -x+2y=-4 and 2x+y=3
Click here to see answer by math_tutor2020(3816)

Question 1209002: (0, -3) slope of 1/3
Click here to see answer by josgarithmetic(39613)

Question 1209209: Given that x = 2ᵅ and y = 4ⁿ, show clearly that log₂(x²y) = 3α + 2n
Click here to see answer by math_tutor2020(3816)

Question 1209209: Given that x = 2ᵅ and y = 4ⁿ, show clearly that log₂(x²y) = 3α + 2n
Click here to see answer by ikleyn(52747)

Question 1205503: Express the following as a product of transposition in two ways.
1. [1 2 2 1 3 4 4 3 5 6 6 5 7 8 8 7 ]
2. [1 2 2 1 3 4 4 5 5 6 3 7 7 8 8 6 ]

Click here to see answer by CPhill(1959)

Question 1205502: Express each of the following permutations of [ 1 2 3 4 5 6 7 8 ] as a product of transpositions.
1. [1 2 3 4 3 4 5 6 5 6 8 2 7 8 7 1 ]
2. [1 2 1 3 3 4 8 4 5 6 6 7 7 8 5 2 ]

Click here to see answer by CPhill(1959)

Question 1206708: Let x be a hypergeometric random variable with N = 16, n = 3, and M = 4. (Suppose you are given
p(0) = 0.39, p(1) = 0.47, p(2) = 0.13, p(3) = 0.01.
Furthermore, you are given that
𝜇 = E(x) = 0.75 and 𝜎2 = 0.48750.)
What proportion of the population of measurements fall into the interval (𝜇 ± 2𝜎)? (Round your answer to two decimal places.)
What proportion of the population of measurements fall into the interval (𝜇 ± 3𝜎)? (Round your answer to two decimal places.)

Click here to see answer by CPhill(1959)

Question 1207409: The points A and B have position vectors, relative to the origin O, given by
OA = -1 + 3j + 5k and OB = 3i - j - 4k
The line I passes through A and is parallel to OB. The point N is the foot of the perpendicular from B to l
i) State a vector equation for the line I.
ii) Find the position vector of N and show that BN = 3.
iii) Find the equation of the plane containing A, B and N, giving your answer in the form ax + by + cz= d.
for part i) and ii) i have done it and got the answer for i) is r = -i + 3j + 5k + λ(3i -j-4k) and part ii) i correctly showed BN=3
im having problem solving part iii)
Click here to see answer by ElectricPavlov(122)

Question 1207395: The lines l and m have vector equations
r = 2i-j+4k+s(i+j- k) and r= -2i + 2j+ k+ t(-2i+j+ k)
respectively・
i) Show that l and m do not intersect.
The point P lies on / and the point @ has position vector 2i - k.
ii)Given that the line PQ is perpendicular to l, find the position vector of P.
(iii) Verify that Q lies on m and that PQ is perpendicular to m.
Click here to see answer by ElectricPavlov(122)

Question 1207252: Results of a consumer survey show that over a one-year period, 40% of full-fat milk drinkers will switch to low-fat milk, and 20% of low-fat milk drinkers will switch to full-fat milk. At present, 60% of the people surveyed drink full-fat milk.
a) Write the initial probability matrix.
b) Write the transition matrix.
c) Determine the percentage of people expected to drink full-fat milk one year from now.
d) Determine the percentage of people expected to drink full-fat milk three years from now.
Click here to see answer by ElectricPavlov(122)

Question 1202687: The National Turkey Association wants to experiment with the effects of three different feed mixtures on weight gain in poults. test at the .05 level the hypothesis that there is no effect of feed mixture on weight.
charts; weight(in pounds)
Feed Mixture A Feed Mixture B feed Mixture C
11.2(a) 12.6 (b) 11.3 (c)
12.1(a) 10.8 (b) 11.9(c)
10.9 (a) 11.3 (b) 12.4(c)
11.3 (a) 11.0 (b) 10.6(c)
12.0 (a) 12.0 (b) 12.0 (c)
10.7 (b)
Click here to see answer by asinus(45)

Question 1200487: A second employee of the computer
store in Problem 57 is paid a base salary of $3,000 a month
plus a 5% commission on all sales during the month.
(A) How much must this employee sell in one month to earn
a total of $4,000 for the month?
(B) Determine the sales level at which both employees
receive the same monthly income.
(C) If employees can select either of these payment methods, how would you advise an employee to make this
selection?
Click here to see answer by GingerAle(43)

Question 1200016: Grace's bakery specializes in giant cupcakes. Bach cardboard cupcake container is filled with batter and baked in the oven. The baked cupcake forms a perfect hemispherical on top of the container. The surface area of this is frosted. A clear plastic lid, identical in size and shape to the cupcake container, is then placed on top. These containers are designed such that R, =
R, and h - 2R. Given that 100 cm° of batter costs 94, 100 cm° of frosting costs
4
274, 100 cm? of cardboard costs 1.5¢, and 100 cm? of plastic costs 34, complete the tasks below on the next page.
The following formulas may be helpful:
Conical frustum:
Hemisphere:
SA = 277?
2
V=
S4 (sides only) =兀（号十 )s
V-三Th(R+R及十吗)
Create functions of R, which return the cost, in dollars, of ingredients, I, and packaging, P.
Approximate all coefficients to 4 decimal places.
Finc the volume of a baked cupcake if Grace wants 85% of the cost to go toward ingredients. Round to 2 decimal places.
Hints: Consider that.
15
Use the "intersect" graphing calculator tool to find R,.
c. Find the efficiency ratio for the packaging to the baked cupcake, to 2 decimal places.
38
Click here to see answer by textot(100)

Question 1209320: x² + y² = 7
x³ + y³ = 10
Find only the real values of (x + y)
Click here to see answer by Edwin McCravy(20054)

Question 1198682: Assume the production function for broiler is q = 0.6x1+ 0.6x2-0.02x1^2-0.05X2^2
Assume that the cost function is C=0.02x1+0.04x2+40
Determine the quantities of x1 and x2 if q=4kg broiler
Click here to see answer by CPhill(1959)

Question 1197279: The bases of a right cylindrical solid are each 135 degrees sectors of circles with a 4-inch radius each. The altitude of the solid is 12 inches. The lateral surface area of this solid may be expressed as S = b(c + 3pi) square inches. Find b + c.
Click here to see answer by onyulee(41)

Question 1197129: Try to determine which column exerts greater partial pressure by putting
E on the blank if the column on the left is greater than the column on the right and
putting Z on the blank if the column on the right is greater than the column on the left.1.
Ptotal = 202 kPa
n1 = 0.4 mol
ntotal = 1.2 mol
or
Ptotal = 30 psi
n2 = 5 mol
ntotal = 14 mol
Ptotal = 0.83 atm
X1 = 0.23
or
Ptotal = 19 psi
X2 = 0.19
Click here to see answer by onyulee(41)

Question 1196344: Let Z~N(0,1) and z_αthe value such that P(Z≥z_α )=α. Express each of the probabilities below in terms of α. Show the steps used to get to the answers.
3.1 P(Z
Click here to see answer by ElectricPavlov(122)

Question 1198508: Three students (A, B, and C) are asked to determine the volume of a sample of ethanol. Each student mea- sures the volume three times with a graduated cylin- der. The results in milliliters are: A (87.1, 88.2, 87.6): B (86.9, 87.1, 87.2); C (87.6, 87.8, 87.9). The true volume is 87.0 mL. Comment on the precision and the accuracy of each student's results.
Click here to see answer by ikleyn(52747)

Question 1196470: Variables x and y are such that when lg(2y+1) is plotted against x^2, a straight line graph passing through the points (1,1) and (2,5) is obtained.
a) Find y in terms of x.
b) find the value of y when x = √3/2.
c) Find the value of x when y = 2.
Click here to see answer by proyaop(69)

Question 1195986: An appliance service company is located centrally in roughly square area x miles on a side. It charges $27 per call, not including parts and labor, and travel cost is figured at $1.50 per mile. The average distance traveled per call is 1.2x miles. In a month the average number of calls per square mile of service area is 30.
a)What should x be if net travel income (which excludes parts and labor) is to be maximized?
b)What lot size yields minimum cost?

Click here to see answer by proyaop(69)

Question 1195967: An appliance service company is located centrally in roughly square area x miles on a side. It charges $27 per call, not including parts and labor, and travel cost is figured at $1.50 per mile. The average distance traveled per call is 1.2x miles. In a month the average number of calls per square mile of service area is 30.
a)What should x be if net travel income (which excludes parts and labor) is to be maximized?
b)What lot size yields minimum cost?

Click here to see answer by proyaop(69)

Question 1194648: Let (i_1 i_2….i_k) denote a k-cycle in S(n). Show that for any σ in S(n), we have that σ (i_1 i_2….i_k) σ-1=( σ(i_1) σ(i_2)… σ(i_k)).
Click here to see answer by proyaop(69)

Question 1194507: At the end of each year for 8 years, a corporation will deposit $12, 500 in a depreciation fund to provide
for replacement of machinery at the end of 8 years. If the fund accumulates at 8% effective, how much is in it
just after the: (a) last deposit; (b) 5th deposit?
Click here to see answer by ikleyn(52747)

Question 1193654: What is the solution to the integral of (ln^3 x) / (x)(√ln^2 x - 4) dx using trigonometric substitution? The answer should be equal to ((8+ln^2 x)/3)(√ln^2 x - 4).
Click here to see answer by parmen(42)

Question 1193572: find the extrema of the ff. function on the given interval, if there are any. determine the values of x at which the extrema occur.
f(x)= x/x^2+2 on [-1,4].
Click here to see answer by parmen(42)

Question 1193571: find the extrema of the ff. function on the given interval, if there are any. determine the values of x at which the extrema occur.
f(x)= x the square root of 4-x^2 on [-1,2].
Click here to see answer by parmen(42)

Question 1193570: find the extrema of the ff. function on the given interval, if there are any. determine the values of x at which the extrema occur.
f(x)= 2secx-tanx on [0,pi/4].
Click here to see answer by parmen(42)

Question 1193826: A portion of an ANOVA summary table is shown below.
Source Sum of Squares Degrees of Freedom
Between 19 3
Within (error) 34 26
Total 53
The critical value for this problem should have dfN (degrees of freedom in the numerator) and dfD (degrees of freedom in the denominator) of
A. dfN = 3, dfD = 26
B.dfN = 19, dfD = 34
C. dfN = 34, dfD = 19
Click here to see answer by parmen(42)

Question 1193825: A Two-Way ANOVA Summary Table is shown below.
Source SS d.f. MS F
Factor A 16.63 2 8.31 4.89
Factor B 5.13 2 2.57 1.51
Interaction A × B 17.88 4 4.47 2.63
Within (error) 61.20 36 1.7
Total 100.844 44
The critical value for the F test using = 0.05, d.f.N. = 2, and d.f.D = 36 is 3.26. Then,
A.only the null hypothesis concerning Factor A should be rejected.
B.only the null hypothesis concerning Factor B should be rejected.
C.all of the null hypotheses should be accepted.
Click here to see answer by parmen(42)

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