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

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Algebra: Expressions involving variables, substitution

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Question 58624This question is from textbook Beginning Algebra

: Solve each literal equation for the indicated variable.
A = 1/2h(B + b) (solve for b) Area of a trapezoid
This is the problem in word form, (A) equals one half (h) times (B + b), solve for (b)This question is from textbook Beginning Algebra

Click here to see answer by faceoff57(65)

Question 58627This question is from textbook Beginning Algebra

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Question 58627This question is from textbook Beginning Algebra

Click here to see answer by uma(370)

Question 58628This question is from textbook Beginning Algebra

: Rose’s garden is in the shape of a trapezoid. If the height of the trapezoid
is 16 m, one base is 20 m, and the area is 224 m^2, find the length of the other base.This question is from textbook Beginning Algebra

Click here to see answer by uma(370)

Question 58601: 3/2y – 3/2y+4
4/3n + 2/n+1 + 2 n^2+n
please help i do not know how to figure these out
Click here to see answer by faceoff57(65)

Question 58595: what does the comma mean between the two fractions? and how would i solve it?
64. 4/x-y , 5x/2y-2x
Click here to see answer by funmath(2873)

Question 58724: 40. c+3/c-1 = c+2/c-3
Click here to see answer by stanbon(26259)

Question 58721: a+4/2 = a+4/a
Click here to see answer by checkley71(8405)

Question 58826: (x*x*x*x -81) / ( x -3)
Click here to see answer by terbear1963(43)

Question 58831: 3(w+2)-(12-w)
Click here to see answer by funmath(2873)

Question 58831: 3(w+2)-(12-w)
Click here to see answer by changuita(1)

Question 58847: help please? it seems simple but I just can't get it right.
2A/3 = 8 + 4A, for A
Click here to see answer by rcmcc(152)

Question 58754: Ride the peaks. Smith bicycled 45 miles going east from Durango, and Jones bicycled 70 miles. Jones averaged 5 miles per hour more than Smith, and his trip took one half hour longer than Smith’s. How fast was each one traveling.

Click here to see answer by ankor@dixie-net.com(6691)

Question 58952: solve for x. x+2/x-2=4/8
Click here to see answer by gurlygurl(2)

Question 58999: 4n-6n=2n
Click here to see answer by funmath(2873)

Question 59021: 64. 4w-1/3w+6 – w-1/3 = w-1/w+2
w=2

Click here to see answer by Edwin McCravy(2920)

Question 59014: -4y - (5y +6) = -7y + 3 i need a step by step on how to solve
-4y (-5y +6) = -7y + 3
20y + 6 = -7y + 3
i got stuck here
Click here to see answer by ankor@dixie-net.com(6691)

Question 59080: [(x squared -2x-3) divided by (x squared - x-2)] all divided by [(x squared -4x+3) divided by (x squared +5x-6)]
I've simplified and now stuck at [(x-3) divided by (x-2)] all divided by [(x-3) diviided by (x+6)]
Click here to see answer by funmath(2873)

Question 59161This question is from textbook

: How do you solve for a variable? Here's an example of a problem
2p+5r=q solve for p
This question is from textbook

Click here to see answer by checkley71(8405)

Question 59166: I need help on solving equations with variables on both sides like:
x-3=6x+7
Click here to see answer by stanbon(26259)

Question 59166: I need help on solving equations with variables on both sides like:
x-3=6x+7
Click here to see answer by checkley71(8405)

Question 59192: 118. 3+ 1/x-2 = 2x-3/x-2 what do i do with this equation and how do i work it i do not understand can you please help??? :) thank you for your hard work

Click here to see answer by stanbon(26259)

Question 59184: 50. ab+b^2/4ab^5 over a+b/6a^2b^4 yah another division problem i do not understand. can you lend some of your wounderful knowledge. thanks
Click here to see answer by Cintchr(475)

Question 59222This question is from textbook elementary and intermediate algebra
: Please help me solve: 12,000(1 + r^2)= 27,000This question is from textbook elementary and intermediate algebra

Click here to see answer by josmiceli(3003)

Question 59310This question is from textbook
: -x/2=11.5 solve for x The negative sign is in front of x/2 not specifically x, I don't know if that matters I haven't paid much attention.This question is from textbook

Click here to see answer by checkley71(8405)

Question 59223This question is from textbook elementary and intermediate algebra
: an investment was made for $12,000. 2-years it was sold and received $27,000 find the average annual return by solving 12,000(1 + x^2)=27000This question is from textbook elementary and intermediate algebra

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Question 59390This question is from textbook

: A common mistake when solving equations is the following:
The equation: 2(x - 2) = x + 3
First step in solving: 2x - 2 = x + 3
Write a clear explanation of what error has been made. What could be done to
avoid this error?
This question is from textbook

Click here to see answer by Edwin McCravy(2920)

Question 59402This question is from textbook Algebra 1 An Incremental Development

: The question from my textbook is...
'Add. Write the answer in descending order of the variable:
(4x^3+x^2+3)+(x^3+2x^2+1)'
I need help on how to find the answer. I don't understand it. Can you please help me? Thank you so much for your time!This question is from textbook Algebra 1 An Incremental Development

Click here to see answer by funmath(2873)

Question 59385This question is from textbook

: Geometry. The length of a rectangular playing field is 5 ft less than twice its width.
If the perimeter of the playing field is 230 ft, find the length and width of the field.This question is from textbook

Click here to see answer by funmath(2873)

Question 59427This question is from textbook

: Science and medicine. A chemist has 300 milliliters (mL) of solution that is 18%
acid. How many milliliters of acid are in the solution?
This question is from textbook

Click here to see answer by uma(370)

Question 59389This question is from textbook

: Business and finance. There are 850 Douglas fir and ponderosa pine trees in a
section of forest bought by Sawz Logging Co. The company paid an average of
$300 for each Douglas fir and $225 for each ponderosa pine. If the company paid
$217,500 for the trees, how many of each kind did the company buy?
This question is from textbook

Click here to see answer by tutorcecilia(2042)

Question 59477This question is from textbook
: How to slove 5x=(x-1)+3+2x
5x =(x-1)+3+2x (Subtract 2x from both sides of the equal sign.)
3x = x-1+3 (Subtract x to both sides of the equal sign.)
2x = -1+3 (Add negative one to postive three.)
2x = 2 (Divide both sides of the equal sign by 2.)
x = 1This question is from textbook

Click here to see answer by checkley71(8405)

Question 59488: Can someone help me with this problem?
Given f(x) = x^2 + 3x + 2, I need to find f(0).
Thank you,
sher
Click here to see answer by checkley71(8405)

Question 59488: Can someone help me with this problem?
Given f(x) = x^2 + 3x + 2, I need to find f(0).
Thank you,
sher
Click here to see answer by funmath(2873)

Question 59443This question is from textbook Agebra 1
: y/5 + 4 = 40.5?This question is from textbook Agebra 1

Click here to see answer by checkley71(8405)

Question 59526: Simplify the polynomial below
-4x(5x-3)+4x-(11-20x2)
Click here to see answer by stanbon(26259)

Question 59584: how do you simplify 2/2-(2/(2-x))
Click here to see answer by tutorcecilia(2042)

Question 59454: solve 4(x-1)= 2y
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Question 59722This question is from textbook

: Solve.
4(x + 2) – 3x = x – 6This question is from textbook

Click here to see answer by stanbon(26259)

Question 59721This question is from textbook

: Ricardo is 4 years less than twice as old as his sister. The sum of their ages is 20. How old is Ricardo?This question is from textbook

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Question 59719This question is from textbook

: The length of a rectangle is 2 cm more than twice its width. If the perimeter of the rectangle is 52 cm, find the dimensions of the rectangle.This question is from textbook

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Question 59716This question is from textbook

: Solve.
–4(2x + 1) + 2(4x – 3) = x – 10This question is from textbook

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Question 59718This question is from textbook

: Identify the rate in the statement
" 72 is 24% of 300."This question is from textbook

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Question 59897: A garden supply store sells two types of lawn mowers. Total sales of mowers for the year were $8379.70. The total number of mowers sold was 30. The small mower cost $249.99. The large mower costs $329.99. Find the number sold of each type of mower.
Click here to see answer by checkley71(8405)

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