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Tutors Answer Your Questions about Expressions-with-variables (FREE)
Question 102371: Factor completely:
3(2y+3)^2+23(2y+3)-8
I started by using the substitution method, let u = 2y+3
3u^2+23u-8
(3u+24)(u-1)
{3(2y+3)+24}{(2y+3)-1}
(6y+6+24)(2y-2)
(6y+30)(2y-2)
{6(y+5)}(2(y)}
Now I'm stuck. Please help.
Click here to see answer by bucky(1732)   |
Question 102321: how do you solve two step equations? i am in ninth grade, and to tell you the truth, i am not very good at math but i do have a b- for a grade. my name is nikol so if you can help me that would be great!!! thanks
Click here to see answer by elima(1433) |
Question 102664This question is from textbook
: Please help!
The problem is:
Solve the system by using the substitute method. Determine whether the equations are independent, dependent or inconsistent.
Eq 1 states: 3x + 5y = 25
Eq 2 states: x -2y = -10This question is from textbook
Click here to see answer by jim_thompson5910(13787) |
Question 102755: a) Perform the indicated operation. Reduce each answer to lowest terms.
Frist one: 4/3n + 2/n+1 + 2/n^2+n
B)Simplify each complex fraction. Reduce each answer to lowest terms.
Frist one: 1/3 + 1/y / y/3-3/y
Second one: ab+b^2/4ab^5 / a+b/6a^2b^4
c)Solve each equation:
Frist one: 2+4/2 = a+4/a
Second one: 3/x-2 - 5/x+3 = 1/x^2+x-6
Can somoene please help me with the above. thank you so much for any help you can provide me with
Click here to see answer by stanbon(26259) |
Question 102752: A) Find the LCD, covert each rational expression into an equivalent expression with the LCD as the denominator.
4/x-4 , 5/6-a
B)If the given expressions were used as denominators of rational expressions, then what would be the LCD for each group of denominators? See example 3
3/4b^2-0 2b/2b+3 -5/2b^2-3b
Any help with the above two would greatly appreciated. I am trying to better understand how to do these and my text book is of no help.
Click here to see answer by stanbon(26259) |
Question 102767: I would really appericiate if you wouls help me on this problem...
Two thirds of a number and three is the same as 3 multiplied by 1 less than twice the number. What is the number?
Thank you very much
Click here to see answer by Nate(3495) |
Question 102704: Factor completely:
b^3m^3-14b^2m^2+49bm
Here are my options, which do not help me at all:(
a) bm9b^2m^2-14bm+49)
b) bm(bm-7)(bm+7)
c) m(b^3m-7b^2)
d) bm(bm-7)^2
Please help me understand this a little better. Thank you, thank you.
Click here to see answer by elima(1433) |
Question 102857: Show a complete solution to each problem.
Word Problem#1
Big plane. At full throttle a light plane flies 275 miles against the wind in the same time it flies 325 miles with the wind. If the plain flies at 120 mph at full throttle in still air, then what is the wind speed?
Word Problem #2
Filling a tank. A water tank has an inlet pipe and a drain pipe. A full tank can be emptied in 30 minutes if the drain is opened and an empty tank can be filled in 45 minutes with the inlet pipe unopened. If both pipes are accidentally opened when the tank is full, then how long will it take to empty the tank?
Thank you for any help you can provide me with. !!!!!!!!!
Click here to see answer by stanbon(26259) |
Question 102859: Problem #1
At a well known university ¼ of the undergraduate students commute and 1/3 of the graduate students commute. 1/10 of the undergraduate student drive more than 40 mils daily and 1/6 of the graduate students drive more than 40 miles daily. If there are twice as many graduate students then what fractions of the commuters drive more than 40 miles daily?
Please help me with the above. Thank you so much!!!!!!!!!!
Click here to see answer by ankor@dixie-net.com(6691)  |
Question 103049: A person has quarters, dimes, nickels, and pennies, with a total value of $3.86. The number of nickels is twice the number of quarters. The number of quarters is two less than the number of dimes. There are 40 coins altogether. Write and solve an equation to find the number of each coin.
Please show all work so i can learn how to solve this for the test tommorow.
Click here to see answer by scott8148(3382)  |
Question 103237: It's been a long time since I've done Algebra and I don't know how to help my daughter with this one....
The three most populous countries of the world are China, India, and the Soviet Union, with a combined population of 1,650 million. Two hundred million more people live in China than in India, and the combined population of India and the Soviet Union is 50 million more than that of China. How many people live in each country.
I'd like to see how this is written out in equation form....not just get the answer.
Click here to see answer by stanbon(26259) |
Question 103236: It's been a long time since I've done Algebra and I don't know how to help my daughter with this one....
A banana contains 3 more milligrams (mg) of calcium than an apple and 40 mg of calcium less than an orange. How much calcium is there in an orange if it contains the same amount as 5 apples and a banana.
I'd like to see how this is written out in equation form....not just get the answer.
Click here to see answer by stanbon(26259) |
Question 103236: It's been a long time since I've done Algebra and I don't know how to help my daughter with this one....
A banana contains 3 more milligrams (mg) of calcium than an apple and 40 mg of calcium less than an orange. How much calcium is there in an orange if it contains the same amount as 5 apples and a banana.
I'd like to see how this is written out in equation form....not just get the answer.
Click here to see answer by scott8148(3382) |
Question 103236: It's been a long time since I've done Algebra and I don't know how to help my daughter with this one....
A banana contains 3 more milligrams (mg) of calcium than an apple and 40 mg of calcium less than an orange. How much calcium is there in an orange if it contains the same amount as 5 apples and a banana.
I'd like to see how this is written out in equation form....not just get the answer.
Click here to see answer by edjones(3292)  |
Question 103302: How do you write a variable expression for these word phrases:
The value in cents of n nickels
The value in cents of d dimes and p pennies
The value in cents of w dollars
The value in dollars of y cents
The next whole number following a whole number w
Click here to see answer by HyperBrain(694) |
Question 104068:
The distance between Buffalo, New York and Chicago, Illinois is 600 Miles. On a U.S. road atlas, this distance is represented by 10 inches. On the same atlas, the distance between Chicago and Denver, Colorado is 18 inches. What is the distance between Chicago and Denver?
Click here to see answer by elima(1433) |
Question 104155: Hello! I'm having problems with substitution and for the following problem i keep getting X=7 y=4 and z=1. I thought this made sense but my answer sheet says it should be x=2 y=1 and z=1. Could you show me how its done so i can compare it to the way i've been trying?
here's the equation and thank you!!!
-3x-3y+2z=-7
z=1
-2x-3y+z=-6
Click here to see answer by stanbon(26259) |
Question 104174: Hi! I'm stumped on this last question on my homework. It's substitution and for some reason i can't figure it out and i kepe getting different answers for the variables. Could you help me please? I don't think i can figure this one out.
x+y+3z=-4
-x-y-2z=5
2x-z=-3
thanks!!!
Click here to see answer by scott8148(3382) |
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