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 Test Calculators and Practice Answers archive Word Problems Lessons In Depth

 Question 161476: (5y^2w^2+z)(2y^3 w^2+3z) I tried to use the foil method but I got lost Click here to see answer by jim_thompson5910(28476)

 Question 161474: (11x+3y)(x+4y) I tried to do the foil method 11x^2+44xy+3yx+12y^2 Click here to see answer by jim_thompson5910(28476)

 Question 162113: Factoring Completely x^3y+2x^2y^2+xy^3 x ( x^2y + 2xy^2 + y^3) xy (x^2 + 2xy + y^2) xy(x + y)(x +y) or xy(x + y )^2 Click here to see answer by Earlsdon(6287)
 Question 162113: Factoring Completely x^3y+2x^2y^2+xy^3 x ( x^2y + 2xy^2 + y^3) xy (x^2 + 2xy + y^2) xy(x + y)(x +y) or xy(x + y )^2 Click here to see answer by eperette(173)

 Question 162135: Factoring by grouping x^3+ax+3a+3x^2 Lets reorganize this so we may factor by grouping x^3 + 3x^2 + ax + 3a x^2(x + 3) + a(x +3) (x^2 + a)(x + 3) Click here to see answer by eperette(173)

 Question 162131: Factoring Completely a^4b+a^2b^3 a^2 (a^2b + b^3) a^2b (a^2 + b^2) Click here to see answer by eperette(173)

 Question 162087: Greatest common factor for monomials 16x^2z,40xz^2,72z^3 I believe the answer is 10z^2 since the x is not in all the monomials Click here to see answer by elima(1433)

 Question 162183: Hey, could you please solve the following problem, and thanks, For f(x)= 3 -2x solve, if f^-1(x)= 0 i will be waiting for the answer and thank you, Click here to see answer by jim_thompson5910(28476)

 Question 162340: Factor each trinomial using the ac method 2x^2+11x+5 Click here to see answer by checkley77(12569)

 Question 162337: Factor each polynomial, if the polynomial is prime say so 3x^3y^2-3x^2y^2+3xy^2 Click here to see answer by gonzo(654)

 Question 162332: Factor each polynomial. If the polynomial is prime say so. 18z+45+z^2 Click here to see answer by checkley77(12569)
 Question 162332: Factor each polynomial. If the polynomial is prime say so. 18z+45+z^2 Click here to see answer by Alan3354(30957)

 Question 162408: An internal control policy for an online fashion accessories store requires a quality assurance check before a shipment is made. The tolerable exception rate for this internal control is 0.05. During a n audit, 500 shipping records were sampled from a population of 5,000 shipping records and 12 were found that violated the control. What is the upper bound for a 95% one-sided confidence interval estimate for the rate of noncompliance? Could you please help me?? Thanks Rivers Click here to see answer by stanbon(57216)

 Question 162426: There are balls packaged in twos and threes. If I have 38 packages adding up to 100 balls, how many of each package did I use? Click here to see answer by stanbon(57216)

 Question 162405: Hi I really do need your help on this one. Thanks Rivers Assume that house prices in a neighborhood are normally distributed with standard deviation \$20,000. A random sample of 16 observations is taken. What is the probability that the sample mean differs from the population mean by more than \$5,000? a. 0.3174 b. 0.1587 c. 0, because it is assumed that the sample mean is equal to the population mean in a normally distributed population. d.Cannot be determined from the information given. Click here to see answer by stanbon(57216)

 Question 162401: Hey I would highly appreciate it if you could help me out. Thanks Rivers If you were constructing a 99% confidence interval of the population mean based on a sample of n = 25 where the standard deviation of the sample s = 0.05, the critical value of t will be: Click here to see answer by stanbon(57216)

 Question 162519: Factor completely if it is a prime say so. 3a^2-27a Click here to see answer by Fombitz(13828)

 Question 162518: Factor completely if it is a prime say so. 8b^2+24b+18 Click here to see answer by josmiceli(9647)

 Question 162517: Factor completely if it is a prime say so. 3x^3-12x Click here to see answer by vleith(2825)

 Question 162515: Factoring a difference or sum of two fourth powers m^4-n^4 Click here to see answer by checkley77(12569)

 Question 162513: Factor each trinomial using the ac method 8x^2-10x-3 Click here to see answer by KnightOwlTutor(293)

 Question 162693: (x-3)^2+(x+2)^2=17 (x-3)(x-3) + (x+2)(x+2)=17 (x^2-6x+9) + (x^2+4x+4) =17 x^2 - 6x +9 +x^2 +4x +4 =17 2x^2 -2x + 13 =17 2x^2-2x-4=0 (2x-4)(x+1)=0 2x-4=0 and x+1=0 x=2 and x=-1 Click here to see answer by eperette(173)

 Question 162690: x^2-36=0 x^2-36+36=0+36 x^2 = 36 sqr(x^2)=squ (36) x= 6 or x=-6 Check: (6)^2-36= 36-36=0 correct! (-6)^2-36=36-36=0 correct! Click here to see answer by Alan3354(30957)
 Question 162690: x^2-36=0 x^2-36+36=0+36 x^2 = 36 sqr(x^2)=squ (36) x= 6 or x=-6 Check: (6)^2-36= 36-36=0 correct! (-6)^2-36=36-36=0 correct! Click here to see answer by eperette(173)

 Question 162689: Solve each equation 2w(4w+1)=1 2w(4w) + (2w)(1) =1 8w^2 +2w =1 8w^2 + 2w -1 = 1-1 8w^2 + 2w -1=0 (2w + 1)(4w -1)=0 (2w+1)= 0 or (4w-1)=0 w=-1/2 or w=1/4 Click here to see answer by eperette(173)

 Question 162785: 104) Venture captial. Henry invested \$12,000 in a new restaurant. When the restaurant was sold two years later, be received \$27,000. Find his average annual return by solving the equation 12,000(1+r)^2 = 27,000 Click here to see answer by checkley77(12569)

 Question 162890: Write a complete solution to each problem. 29.) The sum of two numbers is 4, and their product is -32. Find the numbers. Click here to see answer by Earlsdon(6287)

 Question 162886: Give the prime factorization for each integer 2.). 336 Click here to see answer by elima(1433)

 Question 163075: 5.) Give the greatest common factor (GCF) for each group. 6y^2,15y^3 Click here to see answer by joecbaseball(37)