Questions on Algebra: Equations answered by real tutors!

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Question 762015: If (n+3) times 3 = 15
What is n?
Click here to see answer by Cromlix(4381)

Question 761965: What is the greatest common factor out of each term: 12xy - 15xz + 30x
Click here to see answer by unlockmath(1688)

Question 762007: Explain how to solve an exponential equation when both sides can be written as a power of the same base.
Click here to see answer by Alan3354(69443)

Question 762079: How do you solve absolute value equations?
Click here to see answer by tanjo3(60)

Question 762164: Write and solve the system of equations algebraically to determine where the two cost options are equivalent showing all work.
Garage A � Monthly Unlimited Parking Pass: $150
Garage B - Hourly Parking Rate: $1.25/ hour (no max)
Additional info- for hourly, the employee will work 8 hour days, 20 days per month.
Let Y= Total amount per month
Let Z= Number of hours per day
Let W= Number of working days in a month; estimated 20.
This is what I have:
Equal Parking Fee (monthly vs hourly)
Y= Monthly Rate
Y=150
$150=(1.25z)20
-$1.25 x Z x 20+$150= 0
-25Z+$150=0
Feedback received:
An algebraic process has been provided, but the algebra is inaccurate.
Can anyone help me?

Click here to see answer by KMST(5328)

Question 762271: My problem is about Addition Methods but I couldn't find it up there so I put here ok so the problem is:
2x+3y=8
-6x+4y=11
Click here to see answer by Alan3354(69443)

Question 762287: Find the lowest degree polynomial f(x) that match the graph below. Leave your answer in factored form.
Graph:

Click here to see answer by jim_thompson5910(35256)

Question 762287: Find the lowest degree polynomial f(x) that match the graph below. Leave your answer in factored form.
Graph:

Click here to see answer by Edwin McCravy(20054)

Question 761334: 10-6*5-2
Click here to see answer by 2897696(96)

Question 762329: the square root of 4y+16 - the square root of y-5 equals 6
Click here to see answer by smiths(2)

Question 762459: I need to solve by completing the square
X^2+2X+48 I believe I would first divide by 2, but not sure what to do after that. Thank you for the help.
Click here to see answer by rothauserc(4718)

Question 762460: I need to solve by completing the square
x^2-4X+45 I believe I would first divide by not sure by what since 45 is neg not positive. Thank you for the help walking me through this one so I can do the rest.
Click here to see answer by josgarithmetic(39616)

Question 762477: 5/6x-2x+8/3=5/3 I'm lost help thanx
Click here to see answer by josmiceli(19441)

Question 762533: Each shirt costs $25 and each tie runs $10.If x is the number of shirts I can buy, then y is the number of ties I can buy too.Write an equation for the total cost of buying some shirts and ties if I have $770 to spend.Write an equation given that I buy 4 times more shirts than ties. How many can I buy of each? Find out by solving a system.
Click here to see answer by solver91311(24713)

Question 762552: (7x+5)-(-3x+7)

Click here to see answer by MathLover1(20849)

Question 762576: and . calculate
Click here to see answer by DrBeeee(684)

Question 762642: X power 1/3 = y power 1/4
wat is the solution for dis ques.

Click here to see answer by ramkikk66(644)

Question 762752: Please help me solve this equation:
Click here to see answer by Alan3354(69443)

Question 762754: Please help me solve this equation:
Click here to see answer by solver91311(24713)

Question 762777: Hi! I'm a senior in nursing school, yet I can't remember the last time I had to solve an algebra equation?! Go figure it would come back to bite me on my way out the door. I used to actually be pretty good and enjoyed math, even though I was never really good at it. Anyways, sorry for the life story! I have to solve an equation in order to figure out a lab value for a patient. I think I have worked it down to where I only need to essentially solve for "x" but at this point I might as well be starring at a calculus, trig, or geometry equation because that is how lost I am. So here is where I started:
GFR(ml/min) = (140-age in yrs) x weight in Kg / 72 x Serum Creatinine
x (multiply this result by) 0.85
Given Information includes:
Age in years= 76
GFR(ml/min)=50.7
Serum Creatinine= 1.1
Solve for "x"=weight in Kg?
So after I plug everything in, I am left with:
((140-76)x weight in Kg /72 x1.1 =50.7)0.85

((64) x weight in Kg /72 x1.1 =50.7)0.85
((64x)/72 x1.1 =50.7)0.85

Click here to see answer by rothauserc(4718)

Question 762863: Please solve the following equation 2(x+1) (x+3)+8= (2x+1) (x+5)
Click here to see answer by Cromlix(4381)

Question 762909: The Morgans paid $50.40 for 1500 kilowatts hours of electricity one month and $50.80 for 1680 kwh the next month how much should they expect to pay for 1840 kwh?
Click here to see answer by Cromlix(4381)

Question 762763: A gas station sells regular gas for $2.25 per gallon and premium gas for $2.85 a gallon. At the end of a business day 340 gallons of gas were sold, and receipts totaled $819. How many gallons of each type of gas were sold?

Click here to see answer by Cromlix(4381)

Question 762936: how do I solve -21=-3 over 7 times w
Click here to see answer by stanbon(75887)

Question 762936: how do I solve -21=-3 over 7 times w
Click here to see answer by MathLover1(20849)

Question 762952: Hello,
I have been working on a more complex equation and have worked it down to the following:
n+4=6n
it is not in fact the solution I am after but a refresher as to how to rework the equation so the unknowns are all on one side of the equation. So, how do I get all the values for n on one side so I can break it down. It has been 25 years since grade 11 math and I am attempting a distance ed course for college entry
Click here to see answer by Alan3354(69443)

Question 762749: -3 |2n+5| = -9
Click here to see answer by Alan3354(69443)

Question 762799: if x+1/x=5 wat is x-1/x

Click here to see answer by waynest(281)

Question 763067: simplify the expression -3^2
Click here to see answer by Cromlix(4381)

Question 763066: solve the equation for x: 5(x-4)=10
Click here to see answer by Cromlix(4381)

Question 763099:
Click here to see answer by Alan3354(69443)

Question 763120: Solve for x
3^(x+4)=27^(2x)
Click here to see answer by Polyhymnio(2)

Question 763120: Solve for x
3^(x+4)=27^(2x)
Click here to see answer by MathLover1(20849)

Question 763120: Solve for x
3^(x+4)=27^(2x)
Click here to see answer by DrBeeee(684)

Question 762557: 2x/3=4-1/2(w+6)
What is x and w
Click here to see answer by Polyhymnio(2)

Question 763065: The profit, P, of a video company in thousands of dollars, is given by
P = -5x^2 + 550x -5000, where x is the amount spent on advertising in thousands of dollars.

Determine the amount spent on advertising that will result in a profit of $0.In other words, you will determine the amount that must be spent on advertising in order for the company to � break even.�
Click here to see answer by ramkikk66(644)

Question 763197: Please find and solve x in the following equation, showing steps:
2x-1/3 - 6x-2/5 = 1/3
Click here to see answer by Cromlix(4381)

Question 763141: (x+7)(x-3)=0
Solve this problam with fully details.
Click here to see answer by lenny460(1073)

Question 749451: Find real solutions if any
(4x-5)/(3-7x)=4
Click here to see answer by tommyt3rd(5050)

Question 763276: How would you solve; (x-5)/(x+6)=(x-3)/(x+4)
Click here to see answer by tommyt3rd(5050)

Question 763283: Leah and Barb started at school and jogged in opposite directions. After 30 min they were 10.5 km apart. Barb had traveled 1.5 km farther than Leah. How far did each jog? Choices for Leah's distance: 4.5, 4.6, 4.7
Click here to see answer by josgarithmetic(39616)

Question 763237: Amber is 12 inches shorter than her father is. Their heights together are at most 140 inches. What is the tallest that Amber could possibly be?
Click here to see answer by ramkikk66(644)

Question 763294: Benjy needs at least 1200 milligrams of calcium each day. Benjy eats an orange and drinks milk to get his calcium. Each orange furnishes 52 milligrams of calcium and milk furnishes 380 milligrams of calcium for each cup. How many cups of milk should Benjy drink each day?
Click here to see answer by Cromlix(4381)

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