Questions on Algebra: Linear Equations, Graphs, Slope answered by real tutors!

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Question 298860: m=4/5, (7,-1)
Click here to see answer by checkley77(12844)

Question 298936: It has been over 40 years since I have had algebra. Below is a problem my son needs to solve. If you can provide the answers hopefully I will begin to remember how equations work so I can help him with the rest of his problems. Thanks.
The equation for profit P in terms of the number of boxes sold s is:
P = 5s - (100 + 2s). The number of boxes sold also depends on the number of choir members.
a. Suppose each member sell 11 boxes. Write an equation that will predict profit from the number of choir members n. (Hint: Firts find an expression for the number of boxes sold)
b. Write an equivalent expression for profit in part (a). Explain what the variables and numbers represent.
c. Suppose the choir has 47 members. What is the profit?
d. Suppose the profit is $1,088. How many choir members are there?
e. In part (d), how many boxes were sold?
Barbara Best

Click here to see answer by richwmiller(17219)

Question 299070: find the value of k such the graph of 3x + k = 5y has an x-intercept of (-4,0)
Click here to see answer by stanbon(75887)

Question 299196: Translate the problem into a pair of linear equations in two variables. Solve the equations using either elimination or substitution.
A sum of money amounting to $3.80 consists of dimes and quarters. If there are 20 coins in all, how many are quarters?
Click here to see answer by mananth(16946)

Question 299197: Use P(l+r)^t to find the interst rate r. Round to nearest hundredth
$8000 (P) grows to $8487 (A) in 2 years (t). Assume that interest is compounded annually.
Click here to see answer by nerdybill(7384)

Question 299213: How do you make a two step equation whose solution is x=2?
Click here to see answer by jim_thompson5910(35256)

Question 299303: trying to do linear graphs. having trouble with x-y=10. can you help?
Click here to see answer by Alan3354(69443)

Question 299337: trying to do linear graphs. having trouble with y = 2x+5. can you help?
Click here to see answer by Alan3354(69443)

Question 299391: write an equation of the line containing the giving point and parallel to the givenline. express your answer in the form y=mx+b (-4,5);8x=9y+4
Click here to see answer by Alan3354(69443)

Question 299437: What is the equation of a line perpendicular to 4x+2y=24?
Click here to see answer by alanc(27)

Question 299440: I need help with the meanings. i dont understand the problem to get an answer. the problem has straight lines where i am putting this instead (. (2m-4)=11
if there are lines does it mean the same as the quotaions(). would i start with the inside and work my way out or do i get rid of the m? please help

Click here to see answer by jim_thompson5910(35256)

Question 299412: Please help me: The sum of two numbers is 24. One number is 2 times as large as the other. What is the numbers?
Larger number:
Smaller number:
Click here to see answer by Greenfinch(383)

Question 299525: Find an equation of a line that is perpendicular to the line that passes through the points (0,1) & (5, 6)?
Click here to see answer by Alan3354(69443)

Question 299726: 7x+5/9y =30
I need to solve X&Y missing coordinates writen out. Thank you.
Click here to see answer by checkley77(12844)

Question 299813: I don't understand this, can someone help?
Write the equation of the line passing through each of the given pairs of points. Write your result in slope-intercept form, where possible.
(-4, 1) and (3, 1)
Click here to see answer by stanbon(75887)

Question 299886: Which of the following statements are true ?
a. the lines
y = 2x - 5, y = ax + 3
are perpendicular when a = -1/2
b. the lines
y = 4x + 3, y = ax + 2
are parallel when a = 4

c. a vertical line has undefined slope.
I don't understand how to solve this problem. Please help.
Click here to see answer by Alan3354(69443)

Question 299960: What is y+3=4/5(x-7) in standard form?
Click here to see answer by Alan3354(69443)

Question 299961: What is y+5=1/2(x-5) in slope-intercept form?
Click here to see answer by nerdybill(7384)

Question 299953: graph using the slope and the y intercept
x+4y=16
Click here to see answer by checkley77(12844)

Question 299964: What is the slope intercept form of a line that passes through point (1,2) and is perpendicular to the graph of y=5x-1?
Click here to see answer by Fombitz(32388)

Question 299929: find the slope if it exists of the line containing the pair of points
(-10,-19) and (-14,-20)
Click here to see answer by checkley77(12844)

Question 299927: find the slope and the y intercept of the line, write a fractional answers in lowest terms. 3y+3x+4=20+3x
Click here to see answer by checkley77(12844)

Question 299926: find the slope and the y intercept
6-1/2y=10x
Click here to see answer by checkley77(12844)

Question 299962: What is the slope intercept form of a line that passes through point (0,2) and is parallel to the graph of y=-3x-6?
Click here to see answer by josmiceli(19441)

Question 300008: determine whether lines are parallel or perpendicular
12x-6y= -24
-2x+y= -8
choose between following answers
parallel because slopes are equal
parallel because slopes are negative reciprocals of each other
perpendicular because slopes are equal
perpendicular because slopes are negative reciprocals of each other
Click here to see answer by checkley77(12844)

Question 300116: Identify an ordered pair that is a solution for the equation
Click here to see answer by Edwin McCravy(20055)

Question 300149: y=mx+b i need help with slpoe and slope intercept
Click here to see answer by Alan3354(69443)

Question 300170: What is the equation of the line perpendicular to the line x=4 and passing through the point (4,2)
Click here to see answer by richwmiller(17219)

Question 300170: What is the equation of the line perpendicular to the line x=4 and passing through the point (4,2)
Click here to see answer by Alan3354(69443)

Question 300168: 5(x+8)-13=3
Click here to see answer by mathfolife(2)

Question 300166: The width of a rectangular box is 20%
of the length. If the perimeter is 192 cm, then what are the
length and width of the box?
Click here to see answer by stanbon(75887)

Question 300284: I need to know how to solve y= -2x-5 and y= 4x-1
I am very confused on how to solve the problems
I also need to categorize them.
Thank you!
Click here to see answer by stanbon(75887)

Question 300216: Are the graphs of the lines in the pair parallel? Explain.
y = x � 11
�4x + y = �6
Click here to see answer by Fombitz(32388)

Question 300293: Please I need your help in solving this problem:
The straight line L is parallel to y + 3x =1
and passes through the point P(2,3). Find its x-intercept.
1. x-intercept = 9/4
2. x-intercept = 3
3. x-intercept = 10/3
4. x-intercept = -3
5. x-intercept = -1
Thank you so much.

Click here to see answer by Stitch(470)

Question 300394: graph the equation 8x+4y=20
Click here to see answer by Fombitz(32388)

Question 300471: Hi! Can you please graph the inequality on a coordinate plane for me please?
9x+8y > 80 Thanks!
Click here to see answer by checkley77(12844)

Question 300655: y=2x-5 how would i graph this line
Click here to see answer by Alan3354(69443)

Question 300710: what is the slope of the line with the equation 2x + 3y + 6 = 0

Click here to see answer by Fombitz(32388)

Question 300897: 4(x+6)=(4x+24)
Click here to see answer by Alan3354(69443)

Question 301049: Alexis works part-time at a clothing store. She is paid an hourly rate of $10.25/h and also earns a commission of 3.5% of her weekly sales. Alexis works at the store 12 hours a week. Is Alexis's goal is to earn $150 every week, what do her total sales need to be?
Click here to see answer by checkley77(12844)

Question 301042: A student council collecs aluminum pop tabs to raise money to purchase a wheelchair. A company buys the pop tabs for $0.88 per kilogram. If 1267 pop tabs have a mass of one pound, how many pop tabs are needed to purchase a wheelchair worth $1500?
Click here to see answer by checkley77(12844)

Question 301076: how do you solve y=2x and y=x+1
Click here to see answer by solver91311(24713)

Question 301032: Juan belongs to a CD club that sells CDs for $11.44 each before tax. His first shipment of CDs costs $90.49 including 13% tax. How many CDs are in his first shipment?
Click here to see answer by checkley77(12844)

Question 301188: I have to graph this 2x+3y=34 and 25x+30y=350 as well as work it out. All I got out of this was y=-5/6x+35/3 and if that is right for the 2nd equation I don't know how to graph it and 34/3 and -2/3 for the first equation and if thats right I don't know how to graph it. Please help me I need this done in a couple days. I appreciate all of your help and support.
Click here to see answer by richwmiller(17219)

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