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Tutors Answer Your Questions about Matrices-and-determiminant (FREE)
Question 57158: Last Monday at 7:30 a.m., an airline flew 89 passengers on a commuter flight from Boston to New York. Some of the passengers paid $120 for their tickets and the rest paid $230 for their tickets. The total cost of all of the tickets was $14,200. How many passengers bought $120 tickets? How many bought $230 tickets?
Click here to see answer by rcmcc(152)   |
Question 57161: A single dose of a dietary supplement contains 0.2 gram of calciun and 0.2 gram of vitamin C. A single dose of a second dietary supplement contains 0.1 gram of calcium and 0.4 gram of vitamin C. If a person wants to take 0.6 gram of calicum amd 1.2 grams of vitamin C, how many doses of each supplement should she take?
Click here to see answer by stanbon(57308) |
Question 58547: The volume of a cylinder (think about the volume of a can) is given by V = πr2h where r is the radius of the cylinder and h is the height of the cylinder. Suppose the volume of the can is 121 cubic centimeters.
a) Write h as a function of r. Keep "" in the function's equation.
Answer:
Show work in this space.
b) What is the measurement of the height if the radius of the cylinder is 3 centimeters? Round your answer to the hundredth's place.
Answer:
Show work in this space.
c) Graph this function.
Show graph here.
Thanks Tine
Click here to see answer by stanbon(57308) |
Question 58547: The volume of a cylinder (think about the volume of a can) is given by V = πr2h where r is the radius of the cylinder and h is the height of the cylinder. Suppose the volume of the can is 121 cubic centimeters.
a) Write h as a function of r. Keep "" in the function's equation.
Answer:
Show work in this space.
b) What is the measurement of the height if the radius of the cylinder is 3 centimeters? Round your answer to the hundredth's place.
Answer:
Show work in this space.
c) Graph this function.
Show graph here.
Thanks Tine
Click here to see answer by venugopalramana(3286) |
Question 60374: 8x+9y=1
-2x+6y=5 solve this matrix. I am the older sister, who hasnt done matrix stuff since high school. I am trying to remember how to solve this equation. can you please help. sorry i didnt try, i doont have a book or anything.
Click here to see answer by kayeith(17) |
Question 60688: x+3=0
x+y+z=1
3x-y-z=11
We must use the Gauss-Jordan elimination.
I have already tried the problem with others and i keep getting the same wrong answer. the book says the answer is (3,-1,-1).
I did this:
1 3 0 / 0
1 1 1 / 1
3 -1 -1 / 11
then i did multiplied -1 to the first row and added to the second row. then multiplied -3 to the first row and added the product to the third row which gave me
1 3 0 / 0
0 -2 1 / 1
0 -10 -1 / 11
i then multiplied -1/2 to the second row which gives me
1 3 0 / 0
0 1 -1/2 / -1/2
0 -10 -1 / 11
them i multiplied 10 to the second row and added the product to the third row and got
1 3 0 / 0
0 1 -1/2 / -1/2
0 0 -6 / 16
by multiplying -1/6 to the third row gave me
1 3 0 / 0
0 1 -1/2 / -1/2
0 0 1 / -16/6
then i multiplied 1/2 to row 3 and added it to row 2 giving me
1 3 0 / 0
0 1 0 / -4/3
0 0 -6 / -16/6
then by multiplying -3 to the row 2 and adding that to row 1 i got
1 0 0 / 4
0 1 0 / -4/3
0 0 1 / -16/6
this give me the answer (4,-4/3,-16/6) which is clearly wrong. Could you look over my steps to see what i did wrong please?
Click here to see answer by hayek(51) |
Question 61637: The local yogurt bar features a banana treat made up of 2lb of bananas, 3lb of topping , and 4lb of frozen yogurt. The cost of the banana treat is $19.00. One pound of topping costs $1 less than one pound of frozen yogurt, which costs as much as 1/2 pound of topping and 4 pounds of bananas. How much does one pound of each ingredient cost?
Click here to see answer by ptaylor(2048)  |
Question 61622: The local yogurtbar features a banana treat made up of 2lb of bananas, 3lb of topping, and 4lb of frozen yogurt. The cost of the banana treat is $19.00. One pound of topping cost $1 less than one pound of frozen yogurt, which costs as much as 1/2 pound of topping and 4 pound of bananas. How much does one pound of each ingredient cost?
Click here to see answer by ankor@dixie-net.com(15649)  |
Question 63494: You have $9,000 to invest in three Internet companies listed on the stock market. You expect the annual returns for companies A, B and C to be 10%, 9% and 6%, respectively. You want the combined investment in comapnies B and C to be twice that of company A. How much should you invest in each company to obtain an average return of 8%?
1.) Set up three equations.
2.) Solve using any of the differnt types of matrix equations, and state which method you are using.
** Please help me with this if you can, I have been trying for about an hour and a half now, and I am completley stumped!! THANK YOU!!
Click here to see answer by stanbon(57308) |
Question 63500: A company manufactures three types of wooden chairs; the Kitui, the Goa, and the Santa Fe. To make a Kitui chair requires one hour of cutting time, 1.5 hours of assembly time, and one hour of finishing time. A Goa chair requires 1.5 hours of cutting time, 2.5 hours for assembly, and 2 hours for finishing. The Santa Fe requires 1.5 hours of cutting, 3 hours of assembly, and 3 hours of finishing. If 40 hours of cutting time, 70 hours of assembly, and 58 hours of finishing time were used one week, how many of each type of chair were produced?
Click here to see answer by stanbon(57308) |
Question 63926: It is common practice for supermarkets to charge same price per unit
Please help !
I had sumbitted this yesterday but havent go a response yet ...please help
Irrespective of the number of units that the customer buys. Fair supermarkets (FS) sells one of its |”catch cow “ products for $ 1500 per unit. Using appropriate concept of calculus determine
o Revenue generated when 10000 units of the “ catch cow “ product are sold
o Additional revenue when between 500 and 15000 units if the “ catch cow” product are sold
Click here to see answer by stanbon(57308) |
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