Questions on Algebra: Equations answered by real tutors!

Tutors Answer Your Questions about Equations (FREE)

Question 62193: Please help me to solve y^3-4y^2-64y+256=0
Click here to see answer by tutorcecilia(2152)

Question 62183: ok i have a couple for you if you could please answer them
one-third(d+9)=-12 whats d??
4.5-1.5(6m+2)=6 whats m??

Click here to see answer by ankor@dixie-net.com(22740)

Question 62175: 19a-3(n+3)=9 whats n??

Click here to see answer by ankor@dixie-net.com(22740)

Question 62283: Hi, I'm stuck on this problem from my pre-algebra teacher:
1/2 3
--- = ---
w 5/6
I tried cross multiplication: 3w = .5/.8; 3w = 6.25; w = 2.083. Is this correct, and is it okay to use a decimal or should I use a fraction in the answer? Thanks.
Click here to see answer by funmath(2933)

Question 62174: 19a-3(n+3)=9 whats n??

Click here to see answer by tutorcecilia(2152)

Question 62285: If I might ask a second question (I apologize, I'm stuck; this is also from my teacher):
-3/7z = 7/5
I multiplied both sides by -7/1 and got 3z = -49/5, but am having trouble when I check my work.
Thanks again in advance.
Click here to see answer by funmath(2933)

Question 62300: ok, i have 2 find out the formula for this table and ive tried all that i can think of, here it is.

Age (yr) 20 30 40 50 60 70
Pulse rate (beats/min) 175 166 157 148 139 130

Write an equation in function notation for the relation.
Click here to see answer by tutorcecilia(2152)

Question 62318: 3n+8=5n+2
Click here to see answer by funmath(2933)

Question 62318: 3n+8=5n+2
Click here to see answer by uma(370)

Question 62367: i dont know how to solve an equation with two variabals on both sides
ex: 10x +14 = 5x +24
Click here to see answer by joyofmath(189)

Question 62367: i dont know how to solve an equation with two variabals on both sides
ex: 10x +14 = 5x +24
Click here to see answer by Earlsdon(6294)

Question 62367: i dont know how to solve an equation with two variabals on both sides
ex: 10x +14 = 5x +24
Click here to see answer by sergio01(1)

Question 62386: 2g-m=5-gh solve for g
Click here to see answer by funmath(2933)

Question 61545: Solving simultaneous equations
9.7x - 1.5y = 62.7
-2.3x - 7.4y = 8.4
Multiply each by 10 to get rid of decimals
Then solve for x in the second equation, so x = -74/23 X y - 840/23
Plug x into the first equation 97(-74/23 X y -840/23) - 15y = 62.7
Is this correct so far? I get bogged down in the math. Help!!!
Click here to see answer by stanbon(75887)

Question 62357: Stan invested $5,000, part at 8% and part at 17%. If the total interest at the end of the year is $490, how much did he invest at 8%?
Click here to see answer by checkley71(8403)

Question 62340: -(3x - 4)
Click here to see answer by bryanpark428(4)

Question 62341: Im trying to help my son with algebra homework i dont remember how to do it the problem is y-3-9=30
Click here to see answer by mystic1306(20)

Question 60355: Factor completely
a. 4b^2 +3b - 10
b. -5g^2 + 2g + 16
Click here to see answer by mystic1306(20)

Question 62405: A toaster manufacturer reviewing historical data notices that the number of toasters produced and the cost to produce the toasters is related by a linear equation. The manufacturer forecasts that 10,000 toasters produced will cost $250,000 and 20,000 toasters produced will cost $350,000. Find the equation that relates to the cost versus the number of toasters produced.
Click here to see answer by 303795(602)

Question 62404: How many microwave ovens will the following manufacturing company need to sell in order to make a profit of $300,000 this year? Yearly fixed costs: $400,000
Cost to make each microwave oven: $85
Selling price of each microwave oven: $199

Click here to see answer by 303795(602)

Question 62462: One day, the temperature at 2:00 A.M. was 43�F, and by 3:00 P.M. the temperature was 56�F. What was the hourly rate of temperature change?
Click here to see answer by uma(370)

Question 62463: Evaluate. 8 + 2 � 5 � 24 � 6 � 2
Click here to see answer by asha(30)

Question 62471: A 3-foot pole casts a shadow of 9 feet. How tall is a tree with a shadow of 12 feet?
Click here to see answer by checkley71(8403)

Question 62467: A cement manufacturer buys limestone for $3 per pound and a special shale mix for $5 per pound. The two ingredients are mixed into a 100-pound compound that cost $4.25 per pound. How much limestone and how much of the shale mix should be added into the compound?
Click here to see answer by checkley71(8403)

Question 62466: At 6:00 A.M. a Pony Express rider leaves San Antonio for Las Cruces. His horse travels at 10 miles per hour. A second Pony Express Rider leaves at 9:00 A.M. with the sole purpose of giving an additional package for the first Pony Express rider to deliver. The second rider�s horse travels at 18 miles per hour. At what time will the second Pony Express rider catch up to the first Pony Express rider. (Assume that the horses maintain the same rate of speed and that no hindrances affect either horse or rider).
Click here to see answer by ankor@dixie-net.com(22740)

Question 62469: You have at least $12.50 in dimes and nickels in your car�s ashtray. Write an inequality that shows the different number of coins in the ashtray.
Click here to see answer by 303795(602)

Question 62503: I have no idea how to do this. Please help.
Solve the following equations for the unknown.
x/3 - 7/8 = 2/5(x + 15/4)

Click here to see answer by funmath(2933)

Question 62523: Hi can you please help me in solving these equations thank you
1.what are the values of x and y if the following are both true
3x - 2y = 3

x + 4y = 29
2. which pair of values satisfies the equation

4x - y = 12

3x - 2y = 14
3. Use the trial and improvement method to solve the equation 2x + 5 = 24. Find a solution that is a positive number and give your answer to 1 d.p.
* i could not fit the power of 3 on top of 2x so 2x has a power of three
Thank you hope you can help me answereing these 3 sets of questions for my homework
Click here to see answer by dolly(163)

Question 62529: A bicyclist and a hiker leave the same place at the same time and travel in the same direction. The bicyclist travels three times as fast as the hiker. At the end of 3hr they are 24 miles apart. How fast does the hiker travel.
Click here to see answer by uma(370)

Question 62578: Divide x^3+2x^2+x+12/x+3
Click here to see answer by stanbon(75887)

Question 62584: A raindrop falls into a puddle and causes a circular ripple to spread out. The radius of the ripple grows at a steady rate of 5 cm/s. what equation would model the ripple exactly 6 s. after the raindrop lands in the puddle?

Click here to see answer by terbear1963(43)

Question 62560: how do you solve 2*3(4+5-3/4(5+7-3))+5
Click here to see answer by Edwin McCravy(20054)

Question 62602: 7y-(4-2y)=3(y+3)-1
7x-3(x+6)=14
Click here to see answer by funmath(2933)

Question 62577: Divide x^3+2x^2+x+12/x+3
Click here to see answer by 303795(602)

Question 62465: Divide x^3+2x^2+x+12/x+3
Click here to see answer by 303795(602)

Question 62646: (x-3)^2-(X+3)^2
Click here to see answer by stanbon(75887)

Question 62646: (x-3)^2-(X+3)^2
Click here to see answer by checkley71(8403)

Question 62126: 2/3x+5=5/2
Click here to see answer by funmath(2933)

Question 62598: how do you work out 1-2x=?
Click here to see answer by jai_kos(139)

Question 61355: 3/4n + 5 = 2/5n
Click here to see answer by tran3209(100)

Question 62704: The revenue for a toaster company is directly proportional to the amount spent on advertising. When the owner spent $5,000 one month, the revenue was $600,000. If the revenue in the next month was $900,000, how much did the company spend on advertising?
I have come up with:
600000=5000k
K=120
900000=120x
X=7500
Is this correct????

Click here to see answer by checkley71(8403)

Question 62711: The length of a rectangular garden is 6 ft less than 4 times its width. If the perimeter of the garden is 38 ft, find the dimensions of the garden.
Click here to see answer by 303795(602)

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