Tutors Answer Your Questions about Linear-systems (FREE)
Question 729763: Please help me solve this problem:
One music company charges a $15 membership fee and $0.75 each to download a song. Another company charges $.90 per song to download a song (no membership fee).
For what number of songs will both companies charge the same amount? How much will it cost when each company charges the same amount? Justify your answer using mathematics.
Click here to see answer by nerdybill(7384)   |
Question 730051: Please HELP me solve this quesion !!!
A line passes through the points (2,9) and (9,2) ~
a. Write the equation of the line.
b. Write the equation of the parallel line going through the origin.
c. Write the equation of the perpendicular line through (2,9).
Click here to see answer by MathLover1(20850)  |
Question 731025: Hello I have this word problem and i'm really confused on how to to write the equation for it. Here's the problem(Sorry for its length): A restaurant manager bought 20 packages of bagels. Some packages contained 6 bagels each, and the rest contained 12 bagels each. There were 168 bagels in all.How many packages of 12 bagels did the manager buy?
Click here to see answer by fcabanski(1391) |
Question 731665: $6,000 dollars is invested in two different accounts earning 3% and 5% interest. At the end of one year, the two accounts earned $220 in interest. How much money was invested at 3%?
--------------------------
it has to be one of the following
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$2,000
$3,000
$4,000
Click here to see answer by mananth(16946)  |
Question 732415: Find the equation with the given properties and sketch the graph-passes through the point of intersection of 2x+y-3=0 and x-y-3=0 and through the point (4,3). I am a bit lost on this: I've solved for each y intercepts (y=-2x-3 and y=x-3). Do I take the intersection of these two (2,-1) and do something like y=-x+1? This was done by looking at the graph, not performing the math...which I am unable to figure out-help.
Click here to see answer by stanbon(75887) |
Question 732628: Completely factor this polynomial:
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2x² - 14x + 24
------------------------ need to know the steps on how to
Rough work :
24*2x^2 (Mulitiplying 1st term with last term)
48 x^2 (finding no.s that multiply to give 48x^2 and add/subtract to give -14x)
2* 24
3*16
4*12
6*8
Solution:
2x^2-14x+24
2x^2-6x-8x+24
2x(x-3)-8(x-3)
(x-3)(2x-8) Answer!
Click here to see answer by SaimaHaroon(4) |
Question 732572: Jane leaves her house and drives in a straight line at a speed of 39 mph. Her speed on the return trip is 49 mph. The trip back home takes 15 minutes less than the outbound trip. What was Jane's total travel time in hours? Assume both trips are in a straight line. Give your answer to 2 decimal places
Click here to see answer by richwmiller(17219)  |
Question 732757: Hello I'm really confused on my homework problem, it's: For a wedding, Shereda bought several dozen roses and several dozen carnations. The roses cost $15 per dozen, and the carnations cost $8 per dozen. Shereda bought a total of 17 dozen flowers and paid a total of $192. How many roses did she buy?
Thanks.
Click here to see answer by stanbon(75887) |
Question 732757: Hello I'm really confused on my homework problem, it's: For a wedding, Shereda bought several dozen roses and several dozen carnations. The roses cost $15 per dozen, and the carnations cost $8 per dozen. Shereda bought a total of 17 dozen flowers and paid a total of $192. How many roses did she buy?
Thanks.
Click here to see answer by josmiceli(19441)  |
Question 732757: Hello I'm really confused on my homework problem, it's: For a wedding, Shereda bought several dozen roses and several dozen carnations. The roses cost $15 per dozen, and the carnations cost $8 per dozen. Shereda bought a total of 17 dozen flowers and paid a total of $192. How many roses did she buy?
Thanks.
Click here to see answer by richwmiller(17219) |
Question 732757: Hello I'm really confused on my homework problem, it's: For a wedding, Shereda bought several dozen roses and several dozen carnations. The roses cost $15 per dozen, and the carnations cost $8 per dozen. Shereda bought a total of 17 dozen flowers and paid a total of $192. How many roses did she buy?
Thanks.
Click here to see answer by lynnlo(4176) |
Question 733283: A company that manufactures bicycle frames has determined that the monthly profit (in dollars) from the sale of x frames is given by
Find the number of frames that must be sold per month for the profit to be zero. For what x-values will the profit be positive?
Click here to see answer by lynnlo(4176) |
Question 733464: Julia and Mary each improved their yards by planting hostas and ivy. They bought their supplies from the same store. Julia spent $93 on 10 hostas and 9 pots of ivy. Mary spent $80 on 8 hostas and 8 pots of ivy. Find the cost one hosta and the cost of one pot of I've.
Click here to see answer by stanbon(75887) |
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