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

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

Question 154902: Could you please help me explain to my child how to simpify the following expression;
7/8(10/14b-48)
I don't know where to begin. Thank you in advance for your help, rguldy
Click here to see answer by stanbon(57412)

Question 154906: Marilyn bought a used bike for $8 more than half its original price. marilyn paid $50.00 for the bike. What was the origianl price of the bike?
Click here to see answer by oscargut(891)

Question 154894: The expression 6s^2 represent the surface area of a cube with edges of length s. Find the surface area of a cube with each edge length.
a. 3 inches b 1.5 meters
I think it is a. am I correct, I don't know how to figure it out. Help
Chris
Click here to see answer by nerdybill(6963)

Question 154926: Write and algebraic expression: Let m represent the number of marbles. "Six fewer than one half of the marbles". I'm just not sure how to write it using fractions.
Click here to see answer by orca(409)

Question 154923: the product of five to the fourth power
Click here to see answer by checkley77(12569)

Question 154976: If V=AH/3, What does H equal?
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Question 154990: the number of days in 4 weeks
write an expression for each quantity?
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Question 154977: how do you solve 2 13/27 + 4 10/11
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Question 155124: the value in cents of 5 quarters
Click here to see answer by nerdybill(6963)

Question 155146: the second side of a triangle is two more than the first side, and the third side is three less than the first side. which expression represents the perimeter of the triangle?
1) x + 5
2) 2x - 1
3) 3x - 1
4) x2 - x - 6
Click here to see answer by oscargut(891)

Question 155209: please help me solve x(x+5)=0
Click here to see answer by stanbon(57412)

Question 155183: I need the answer to this problem:
4(5-2x)
_______
5 = x
Click here to see answer by edjones(7569)

Question 155248: Problem:
7m/2n-8p/n m=(-4) n=(2) p=(1.5)
do i start the problem this way 7(-4)/2(2) getting -28/4=(-7) or do I start like this: 7(-4)=(-28)/2=(-14); (-14)x2=(-28)
If I start the first way I get (-13) if I start the second way I get (-34) which is correct?
Thank-you
Click here to see answer by checkley77(12569)

Question 155317: Transforming equations with multiplication and division.
How do I put the following question into an expression with a variable?
A police helicopter clocked an automobile for 10 seconds over a stretch of highway on fifth of a mile long. At what reate was the automobile traveling in miles per A. Second? B. Hour?
Here's what I have so far..
Let X = Miles per second
X = .2(miles) / 10 sec.
X= .02 mps
Let Y = Miles per hour
Y = [.2(miles / 10 sec.] * 3600
Y = 72 mph
Is there anything I'm forgetting?
I feel like I'm not transforming anything and just solving for the mps and mph. Any help would be greatly appreciated.
Click here to see answer by stanbon(57412)

Question 155401: what is the mathemactical expression of the sum of a number and ten?
Click here to see answer by nerdybill(6963)

Question 155501: The base of a triangle is 5 cm greater than the height. The area is 18cm ^2. Find the height and length of the base
Click here to see answer by vleith(2825)

Question 155532: In Algebra How do you solve this: -(2y+1)=8(y+2)-7
Click here to see answer by sim9739(5)

Question 155530: In Algebra how do you solve this: -(2y+1)=8(y=2)-7

Click here to see answer by jim_thompson5910(28598)

Question 155547: please help me solve this problem
Click here to see answer by checkley77(12569)

Question 155544: On the worksheet it shows the equation:
The first thing i tried to do was get rid of the fraction by mutiplying by the LCD, which i figured would be (z)(2z)(5z)(z+1). however it ended up being a jumbled mess and left me very confused and now I have no idea what to do.
Click here to see answer by scott8148(6628)

Question 155624: product of four and a number
Click here to see answer by checkley77(12569)

Question 155623: product of four and a number
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Question 155603: Let be a random variable with the following probability distribution:
Value (P(X=x)
x of X
10) (0.05)
20) (0.65)
30) (0.05)
40) (0.20
50) (0.05)
Find the expectation E (X) and variance Var (X) of X.

Click here to see answer by oscargut(891)

Question 155573: How can I solve the following equation for P? Thanks.
-3 = (4000/(p-130))*((130+p)/16000)
Click here to see answer by ankor@dixie-net.com(15663)

Question 155675: write and algebraic expression for number of days in w weeks
Click here to see answer by Alan3354(30993)

Question 155675: write and algebraic expression for number of days in w weeks
Click here to see answer by Earlsdon(6287)

Question 155765: NUMBER THEORY: Tripling the greater of two consecutive even intergers gives the same result as subtracting 10 from the lesser even interger. What are the intergers?

This question is from a workbook page dealing with solving equations with the variable on each side.
Click here to see answer by stanbon(57412)

Question 155771: am trying to help my 9th grader with algebra....the problem is: 8=x/5
Click here to see answer by nerdybill(6963)

Question 155771: am trying to help my 9th grader with algebra....the problem is: 8=x/5
Click here to see answer by Earlsdon(6287)

Question 155771: am trying to help my 9th grader with algebra....the problem is: 8=x/5
Click here to see answer by stanbon(57412)

Question 155751: the number of days in 4 weeks write it as an expresion for each quantity
Click here to see answer by checkley77(12569)

Question 155975: Three times the difference of a number x and 5
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Question 155974: Five less than three times a number x = ?
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Question 155972: what is the difference between (-3)^2 and -3^2?
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Question 155957: i couldnt find the type of question it is but it has to do with variables on both sides of the equation 4-2w=6w
Click here to see answer by checkley77(12569)

Question 155984: explain the difference between (-3)^2 and -3^2
Click here to see answer by checkley77(12569)

Question 155995: How to solve this problem..."What is the total cost of buying several shirts at $24.95 each?
Click here to see answer by Earlsdon(6287)

Question 156115: YO GENIUS!{}>{} I'm a sixth grader........ I really need someone to help me on
___ this question. It might sound easy but
>>>>>>>> PLEASE help a KID that need your help.
*****************************^^!*********************************************
-A car is travelling at a speed of 55 miles per hour.You want to an algebraic expression to show how far the car will travel in a certain number of hours. What will be your constant? your variable?
********************************o.0*********************************************
Click here to see answer by oscargut(891)

Question 156158: Expand 5y{x-2y+3}
Click here to see answer by jim_thompson5910(28598)

Question 156164: simplify 6-a+2ac+5c-3ca
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Question 156164: simplify 6-a+2ac+5c-3ca
Click here to see answer by edjones(7569)

Question 156167: How do you simplify this -2squared-3sqrt8-sqrt25
Click here to see answer by SAT Math Tutor(36)

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