Questions on Algebra: Operations with Signed Numbers answered by real tutors!

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Question 748379: Complete the ordered pair ( , 30) so that it is a solution to the equation:
4x + 2y = 120
Please help
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Question 651192: 3|2x+5|=9x-6
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Question 714234: (x^3-3x^2+3x-1)×(x^3-2x^2)
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Question 583610: need help, directions say to simplify, not factoring
(3x^2+11x-4)/(6x^2+7x-3) * (4x^2-9)/(x^2-16)
thanks!
Click here to see answer by tommyt3rd(614)

Question 672066: I have to know how to enter this problem into a calculator properly:
5(67/39)-35*7
What is the answer and how if you have time how to enter into a calculator properly.
Thank you
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Question 640180: what is a verbal expression for (5m)^2+2
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Question 646796: how do you solve problems like 12(2/3)?

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Question 587635: y=2x−2 into a+b=c format
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Question 594886: How do I find V'(t) from equation below...
V(t)=30 - 15(t^2) / (t+3)^2
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Question 595642: How do I differentiate this equation?
I think I am suppose to use the quotient rule here..but I am not sure how to apply it...Thanks!
V(t) = 30 - 15t^2 / (t+3)^2
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Question 597520: Express the following expression in the form of a + bi: (9 + 14i) ((6 – 5i) + (3 - 4i))

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Question 598451: What is the nth term of the arithmetic sequence a[7]=34, a[18]=122?
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Question 609131: Perform the operation. 8r^3s^2 + 6/rs^4
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Question 748333: Slove:
12x^2-6x=0

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Question 613432: -3(-2 - 6 x 2) - [4(2 - 4) - 2]
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Question 651087: If somebody could please help me on a college algebra problem. I need to simplify this problem :
5/6*(2/3-1/6)+7/18
I started out by reducting it to
(4/6 - 1/6)
5/6*3/6+7/8 than somehow got
15/6+7/8
but than i got stuck.
So could somebody please help me and show me how to do this?
That'd be great. Thank you! :)
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Question 680402: D=36+5.8x
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Question 713565: How do i factorise the below
(a+2)(2a)+7a+14
and
64x^2+80xy+25y^2
Thanks.

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Question 716100: 3+3 x 3-3+3= ?

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Question 689586: 4x + 5y = ?
x=6,y=17
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Question 719079: 91,92,93,94,880,960,975,977, ----,----.???

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Question 639963: mr. bailey purchased some groceries that cost d dollars. he paid with a $50 bill. write an expression for the amount of the change he will receive
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Question 746310: If 2x+3y=24 and 2x-3y=12 then value of xy is_____________
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Question 746310: If 2x+3y=24 and 2x-3y=12 then value of xy is_____________
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Question 617695: Solve for b:
(1/b) - (b/(b-1)) = 2
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Question 730564: If tan θ= -3 and cos θ<0, then tan θ/2=?
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Question 675803: How I write a second inequality with the same meaning: x<5
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Question 653590: How is (-2) squared different from -2 squared
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Question 704940: Evaluate each express for x=16 and y=4
3x-3y
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Question 715693: (-25) - (-21) = ?

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Question 740688: what is the answer to 53-[3(8+2)+5(9-5)]

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Question 744711: I am calculating angles and must figure out cosine to the power of -1.
I know what square root is etc., but how do you calculate to a minus power?
Click here to see answer by josgarithmetic(1540)

Question 743682: I need to make the following equation true by adding 2 pairs of brackets
5+7*3-2*9=72
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Question 742454: Hello
I am just starting back to school and it has been a long time since I've had to do any math problems, let alone Pre-Algebra. I am learning to perform the Order of Operations. I am using the P,E,M,D,A,S method. My problem is...
(-36 / 6) - (4 / 4) so far I have this

-36 4____ But should'nt 4/4=1, -36/6=6 or = to 1
6 4
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Question 741501: -1+9(-7g-9)
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Question 736330: 2[3 - 5(3 - 1)²]
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Question 736300: I am dealing with adding signed number. for example: -10+(-7) can u help me.
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Question 735915: (-4+6)[(-8)+(-7)-(-10)] I am not sure how to solve this problem.
Click here to see answer by rfer(12677)

Question 731341: help me perform indicated operations
-8[4+(-2+7)]
_______________
-3[4-(-9)]-3(-9)
thank you, Debbie
Espimom1@aol.com

Click here to see answer by josgarithmetic(1540)

Question 730116: find how long it takes a person to drive 135 miles if she drives on cruise control set at 60 mph.
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Question 730029: i need to solve for X: x/a+x/b=1 it's x over a plus x over b = 1, someone just provided the answer and that does not help. i need to see how you actually arrived at the answer.
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Question 730021: i need to solve for X: x/a+x/b=1 it's x over a plus x over b = 1
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Question 728633: 1/14+18/x=? I need to know how to do a problem like this
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Question 726475: 21<6u

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