Questions on Algebra: Expressions involving variables, substitution answered by real tutors!

Tutors Answer Your Questions about Expressions-with-variables (FREE)

Question 135138: g(x)= 10/7-2x
I have no clue how to solve this.
Click here to see answer by vleith(2825)

Question 135317: x^4-x^2-42=0
Click here to see answer by edjones(7569)

Question 135612: I need a lot of help with theses problems. Your help will be greatly appreciated, thank you!
A. 3x - 6y = 12
B. 2x - y = -4
These two are the problems that I need help with, thank you a lot.

Click here to see answer by stanbon(57940)

Question 135814: simplify this expression:
4a+6b+a
Click here to see answer by checkley77(12569)

Question 135983: Hope I have the right section here, I have multiple variables... The equation I'm needing help with is:
.75 = a/(a + v)
Solve for v
How can I get v on one side of the = by itself? Thanks for any help/suggestions!
Click here to see answer by Fombitz(13828)

Question 136152: I do not understand how to solve this out right. I think i know the answer to the question because the teacher told us it was (4,6). I just don't understand how I would get that.
The equations are
y=2x-2
and
y=x+2
Click here to see answer by checkley77(12569)

Question 136236: How do i solve a problem with a coefficent??
Click here to see answer by stanbon(57940)

Question 136640: This is a Pythagoreans Therom problem.
A right triangle has one leg that is 5cm longer than the other leg. The hypotenuse is 25cm long. Find the length of each leg of the triangle.

Click here to see answer by checkley77(12569)

Question 136669: A ball is dropped from 144ft. above the ground. How long does it take to hit the ground?
Click here to see answer by vleith(2825)

Question 136682: Word problem:
There are 60 dimes and quarters in the drawer. Arny counted them and found that their total value was $8.70. How many coins of each type did Arny have?
Click here to see answer by wvgirl64(4)

Question 136801: With these equations: z=x-y+4, z=y-w-3, and z=w-x+5 , what is the value of z?
Click here to see answer by solver91311(17059)

Question 136964: -6(a+8)

Click here to see answer by checkley77(12569)

Question 137297: Simlify (2x to the 3rd power-2x to the second power-12x) (x to the fourth-2x to the third power- 8x to the second power)-1
(2x^3-2x^2-12x)(x^4-2x^3-8x^2)-1
2x(x^2-x-6)(-x^4+2x^3+8x^2)
2x(x-3)(x+2)-x^2(x^2-2x-8)
2x[(x-3)(x+2)]-x^2[(x-4)(x+2)]
(2x-x^2)(x-3)(x+2)(x-4)(x+2)
-x(2-x^2)(x-3)(x+2)(x-4)(x+2) is the answer.
Click here to see answer by tns_tutor5000(9)

Question 137208: Am having trouble when I have to multiply the whole numbers by the fraactons during some steps that are required to get the values for x and y.
the problem looks something like this
-2x-5y=7
7x+y=-8
Click here to see answer by scott8148(6628)

Question 137848: how do i sove this problem (step by step)
x-y=5 x+2y=7
Click here to see answer by Fombitz(13828)

Question 138038: at a baseball game sam bought 2 hamburgers and 1 order of fries for a toal of $3.75. Erica bought 1 hamburger and 2 orders of fries for a total of $3.00. what is the cost of one hamburger and the cost of one order of french fries?
Click here to see answer by stanbon(57940)

Question 138895: It asks to solve equations with fractional coefficients is to multiply both sides of the equation by the LCD of the denominators.
2x/7+3x/2=25/7
The answer I got for this was 25/17
Obviously it's the wrong answer, I am just confused on what I did wrong!
Please help Thank You=)
Click here to see answer by stanbon(57940)

Question 138897: Solving equations with fractional coefficiants is to multiply both sides of the equation.
x-2/2- x+2/4=1/2
This is a question I did. I have no understanding on how to do it.
Please And Thank You=)
Click here to see answer by stanbon(57940)

Question 138900: Is basically says to simplify
(a^2 B^0 c)^0
My answer for that was abc^2, But than my teacher said that "Any quantity to the power 0=1 (Except for 0 to the power 0 which has no meaning". If I was a math wiz, or have any understanding for math I would get it. I just know my answer was wrong, and don't know how to solve it.
Please help me, Thank you=)
Click here to see answer by stanbon(57940)

Question 138903: Again Simplify
n^-2/n^3
I got n^5
Please help, Thank you=)
Click here to see answer by checkley77(12569)

Question 138902: It says to simplify
x^-2 y^3
I got x^2y^3=x.x.y.y.y
Please help me Thank You=)
Click here to see answer by checkley77(12569)

Question 138890: The amount of farmland in the United States is decreasing by onr acre every 0.0876 hours as farmland is being converted to nonfarm use (American Farmland Trust, www.farmland.org). At what rate in acres per day is the farmland decreasing?
-------------------------------------------------
1/.00876=x/24
.00876x=24
x=24/.00876
x=2,739.7 acres per day are being lost.

Click here to see answer by checkley77(12569)

Question 138888: The problem is: A roller coaster carries 92 people altogether. Some of its cars carry 4 passengers, and the rest carry 6 passengers. There are three fewer 6-passenger cars than 4-passenger cars. How many 4-passenger cars are there?
I started a problem with f=4passenger cars & f-3=6passenger cars, but this doesn't work.
Click here to see answer by edjones(7569)

Question 138841: c/2z + d/3z
Click here to see answer by edjones(7569)

Question 138896: Solving equations with fractional coefficiants is to multiply both sides of the equation.
x/5-x+2/3=1/5
What I got was x=46
Please and Thank You=)
Click here to see answer by ankor@dixie-net.com(15745)

Question 139020: a=5+3(4-2)
Click here to see answer by solver91311(17059)

Question 139211: Hello,
Can you please help me solve this equation
1. ax+by=r solve for x
2. ax+cy=s solve for y
there is one bracket ( { ) in front of both equations, just one for both combinded
thanks
Click here to see answer by stanbon(57940)

Question 139233: how to solve using the U substitution method
(x-1/2)^2 +5(x-1/2)-4=0
Click here to see answer by solver91311(17059)

Question 139382: Point A(-4,1) is in the standard (x,y) coordinate plane. What must be the coordinares of point B so that the line x=2 is the perpendicular bisector of line AB.
Click here to see answer by solver91311(17059)

Question 139384: What expression represents the product of two less than a number and three more than twice the number? Please help me.

Click here to see answer by solver91311(17059)

Question 139468: 1/3x + 2/3 = y
5/7x - y - 2 = 0
This is supposed to be solved with substitution or elimination. Thanks.
Click here to see answer by stanbon(57940)

Question 139933: I have a homework problem that I can't seem to solve, could I have some help...thank you. m^2+6m-9=0. I have tried and can't figure it out.
Click here to see answer by edjones(7569)

Question 139935: I have a homework problem that I've tried to solve the teacher said I'm not coming up with the right answer, but won't help. Could someone please help. 3x^2-2x-5=0 I have -1,5/3 or 1.66 Thank you.
Click here to see answer by rapaljer(4667)

Question 139936: I have a homework problem that I can't seem to find an answer to that is right.
Could I have some help....thank you. 3x^2+2x=3 Need help on how to solve.
Click here to see answer by ankor@dixie-net.com(15745)

Question 140270: Give an example of a fractional form which is indeterminate.
Click here to see answer by stanbon(57940)

Question 140272: Use two unit multipliers to convert 50 kilometers to centimeters.
Click here to see answer by stanbon(57940)

Question 140273: The commutative property of multiplication states: For any real numbers x and y, (x)(y) = _____
Click here to see answer by stanbon(57940)

Question 140276: If 6/3 is multiplied by its reciprocal, the products equals_________.
Click here to see answer by stanbon(57940)

Question 140275: The associative property of multiplication states: For any real numbes x, y, and z,
Click here to see answer by Fombitz(13828)

Question 140281: Simplify
3(1-5) - ((1-7)(-5))=
Click here to see answer by checkley77(12569)

Question 140279: Perform the indicated oeprations. Write fractional answers as mixed numbers or as proepr fractions reduced to lowest terms.
18/2 x 5/4 diveded by 34/ =
Click here to see answer by checkley77(12569)

Question 140467: Evaluate:
c-bc if b = -1 and c = -2
Click here to see answer by checkley77(12569)

Question 140465: simplify
-(-(-(-(-64)))) =
Click here to see answer by checkley77(12569)

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