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Tutors Answer Your Questions about expressions (FREE)
Question 152619: 1 The sum of two numbers is 12. One number is 5 times the other. Can you write the algebraic expressions for these two equations? Can you tell me what the two numbers are?
I know it is 10 and 2 but need all algebraic expressions
2. We know that if you multiply two negative numbers together you always get a positive number. We know that if you perform an arithmetic operation on rational numbers you always get a rational number as the answer. Are there any such rules for irrational numbers? Give examples.
: 1 The sum of two numbers is 12. One number is 5 times the other. Can you write the algebraic expressions for these two equations? Can you tell me what the two numbers are?
I know it is 10 and 2 but need all algebraic expressions
2. We know that if you multiply two negative numbers together you always get a positive number. We know that if you perform an arithmetic operation on rational numbers you always get a rational number as the answer. Are there any such rules for irrational numbers? Give examples.
Click here to see answer by Fombitz(1152)  |
Question 150962: Cheryl and her friends buy a pizza for $15.00 plus a delivery charge of d dollars. If delivery charge is $2.50. What is the total cost?: Cheryl and her friends buy a pizza for $15.00 plus a delivery charge of d dollars. If delivery charge is $2.50. What is the total cost?
Click here to see answer by jim_thompson5910(8006) |
Question 150792: Write a formula that expresses the relationship described below.
P varies jointly as x and y and P = 7 when x = 1 and y = 6.
I'm not sure, but I think it would be P = 6/7xy
: Write a formula that expresses the relationship described below.
P varies jointly as x and y and P = 7 when x = 1 and y = 6.
I'm not sure, but I think it would be P = 6/7xy
Click here to see answer by mangopeeler07(385) |
Question 150702: my brother is 8 years older than me .write an expression for the age of my brother .: my brother is 8 years older than me .write an expression for the age of my brother .
Click here to see answer by jim_thompson5910(8006) |
Question 150558: Im supposed to solve the below expression for X, but I cant figure out what Im doing wrong. I believe your supposed to multiply by the LCD to remove the fraction term. Then when I calculate, Im completely lost. Maybe Im using the wrong LCD.
Problem is x+3/6 - x/5 = 9x-5/30
LCD is 30, so I multiplied each term by 30
5(x+3) 6x = 9x 5
5x + 15 6x = 9x 5
-x + 15 = 9x 5
15 = 10x 5
20 = 10x
x=10
*Answer in my book is x=2
Problem is: 4/x + 2/x+1 = 5
LCD is x(x+1), so I multiplied each term by x(x+1)
4(x+1) + 2x = 5x(x+1)
4x + 4 + 2x = 5x^2 + 5x
6x + 4 = 5x^2 + 5x
4 = 5x^2 + 5x 6x
4 = 5x^2 x
*Answer in my book is x=1
Problem is 24/8x - x/3 = 3-x/6
LCD is 24x, so I multiplied each term by 24x
72 8 = 4x(3-x)
72 8 = 12x 4x^2
64 = 12x 4x^2
*Answer in my book is x=3 or x=6
Problem is 6/4(x-2) + 1/4 = 4/x
LCD is 4(x-2), so I multiplied each term by 4(x-2)
6 + x 2 = x(x-2)
4 + x = x^2 2x
4 + x = 0
x = -4
*Answer in my book is x=3 or x=6
: Im supposed to solve the below expression for X, but I cant figure out what Im doing wrong. I believe your supposed to multiply by the LCD to remove the fraction term. Then when I calculate, Im completely lost. Maybe Im using the wrong LCD.
Problem is x+3/6 - x/5 = 9x-5/30
LCD is 30, so I multiplied each term by 30
5(x+3) 6x = 9x 5
5x + 15 6x = 9x 5
-x + 15 = 9x 5
15 = 10x 5
20 = 10x
x=10
*Answer in my book is x=2
Problem is: 4/x + 2/x+1 = 5
LCD is x(x+1), so I multiplied each term by x(x+1)
4(x+1) + 2x = 5x(x+1)
4x + 4 + 2x = 5x^2 + 5x
6x + 4 = 5x^2 + 5x
4 = 5x^2 + 5x 6x
4 = 5x^2 x
*Answer in my book is x=1
Problem is 24/8x - x/3 = 3-x/6
LCD is 24x, so I multiplied each term by 24x
72 8 = 4x(3-x)
72 8 = 12x 4x^2
64 = 12x 4x^2
*Answer in my book is x=3 or x=6
Problem is 6/4(x-2) + 1/4 = 4/x
LCD is 4(x-2), so I multiplied each term by 4(x-2)
6 + x 2 = x(x-2)
4 + x = x^2 2x
4 + x = 0
x = -4
*Answer in my book is x=3 or x=6
Click here to see answer by jim_thompson5910(8006) |
Question 150205This question is from textbook
: please help
3/5 + 1/3 T=2/5
T=(answer)
ThanksThis question is from textbook
: please help
3/5 + 1/3 T=2/5
T=(answer)
Thanks
Click here to see answer by stanbon(17617) |
Question 149955This question is from textbook
: I am totatly lost with evaluating please help.
problem: 26) 2/3 ab, for a = 7 and b = 4 1/5
27) 4 + mn, for m = 7 2/5 and n = 3 1/4This question is from textbook
: I am totatly lost with evaluating please help.
problem: 26) 2/3 ab, for a = 7 and b = 4 1/5
27) 4 + mn, for m = 7 2/5 and n = 3 1/4
Click here to see answer by jim_thompson5910(8006) |
Question 149561: 6(t+3) + 8 - 5(t + 2)= can you tell me the steps to figure this out: 6(t+3) + 8 - 5(t + 2)= can you tell me the steps to figure this out
Click here to see answer by Fombitz(1152) |
Question 148749: simplify the complex fraction. reduce to lowest terms.
4ab^5/a+b/6a^2b^4
Please help!!: simplify the complex fraction. reduce to lowest terms.
4ab^5/a+b/6a^2b^4
Please help!!
Click here to see answer by jim_thompson5910(8006) |
Question 148751: At a well known university, Ό of the undergraduate students commute and 1/3 of the graduate students commute. One-tenths of the undergraduate students drive more than 40 miles daily and 1/6 of the graduate students drive more than 40 miles daily. If there are twice as many undergraduate students as there are graduate students, then what fraction of the commuters drive more than 40 miles daily? Please help? Is this how to do it?
The fraction of the undergraduate and graduate students who commute is represented by 1/4x +1/3x divided by 1/10x +40 divided by 1/6x + 40. (I'm stuck): At a well known university, Ό of the undergraduate students commute and 1/3 of the graduate students commute. One-tenths of the undergraduate students drive more than 40 miles daily and 1/6 of the graduate students drive more than 40 miles daily. If there are twice as many undergraduate students as there are graduate students, then what fraction of the commuters drive more than 40 miles daily? Please help? Is this how to do it?
The fraction of the undergraduate and graduate students who commute is represented by 1/4x +1/3x divided by 1/10x +40 divided by 1/6x + 40. (I'm stuck)
Click here to see answer by ankor@dixie-net.com(3845) |
Question 148630: please help have admission test for new job in 2hours.
A=B+3(4-C)
if B=5 and C=2: please help have admission test for new job in 2hours.
A=B+3(4-C)
if B=5 and C=2
Click here to see answer by vleith(919) |
Question 147602: Hi,
I am attempting to solve an equation with parentheses inside of brackets. The problems are similar to 9[-7-(77-43)]
I know to solve the parenthases first so I have and I can chane the signs of the terms by doing the following:
9[-70+(-77+43)]
9[-70+34]
9[-36]
-324
This answer seems incorrect but I am unsure where I went wrong. Can you help?
Thank you very much.
: Hi,
I am attempting to solve an equation with parentheses inside of brackets. The problems are similar to 9[-7-(77-43)]
I know to solve the parenthases first so I have and I can chane the signs of the terms by doing the following:
9[-70+(-77+43)]
9[-70+34]
9[-36]
-324
This answer seems incorrect but I am unsure where I went wrong. Can you help?
Thank you very much.
Click here to see answer by oscargut(408)  |
Question 147602: Hi,
I am attempting to solve an equation with parentheses inside of brackets. The problems are similar to 9[-7-(77-43)]
I know to solve the parenthases first so I have and I can chane the signs of the terms by doing the following:
9[-70+(-77+43)]
9[-70+34]
9[-36]
-324
This answer seems incorrect but I am unsure where I went wrong. Can you help?
Thank you very much.
: Hi,
I am attempting to solve an equation with parentheses inside of brackets. The problems are similar to 9[-7-(77-43)]
I know to solve the parenthases first so I have and I can chane the signs of the terms by doing the following:
9[-70+(-77+43)]
9[-70+34]
9[-36]
-324
This answer seems incorrect but I am unsure where I went wrong. Can you help?
Thank you very much.
Click here to see answer by jim_thompson5910(8006) |
Question 147565: 3xy-4x+y
x equals -3 and y equals 2
both the 4x and y are squared: 3xy-4x+y
x equals -3 and y equals 2
both the 4x and y are squared
Click here to see answer by jim_thompson5910(8006) |
Question 147474: 19-(2x+3)=2(x+3)+x please tell me if i did this right.
19-2x-3=2x+6+x
16-2x=3x+6
10-2x=3x
10=5x
x=2: 19-(2x+3)=2(x+3)+x please tell me if i did this right.
19-2x-3=2x+6+x
16-2x=3x+6
10-2x=3x
10=5x
x=2
Click here to see answer by vleith(919) |
Question 147466: a mechanic earns a salary of $350 a week plus he gets $10 for every oil change he carries out.
a) write an eqation to represent the total weekly earnings E, when C oil changes are done.
: a mechanic earns a salary of $350 a week plus he gets $10 for every oil change he carries out.
a) write an eqation to represent the total weekly earnings E, when C oil changes are done.
Click here to see answer by vleith(919) |
Question 147466: a mechanic earns a salary of $350 a week plus he gets $10 for every oil change he carries out.
a) write an eqation to represent the total weekly earnings E, when C oil changes are done.
: a mechanic earns a salary of $350 a week plus he gets $10 for every oil change he carries out.
a) write an eqation to represent the total weekly earnings E, when C oil changes are done.
Click here to see answer by stanbon(17617) |
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