Tutors Answer Your Questions about Expressions-with-variables (FREE)
Question 6161: This question is also on elimination...
3x+4y=19
3x+6y=33
My answers were (7,-1/2)
Now, i'm having the same problem that i had with the last one. The 7 checks, but the -1/2 doesn't. Any suggestions on this one? Thanks
Click here to see answer by glabow(165)  |
Question 6173: I am having trouble understanding how the answer was arived at on the following problem:
5X^2Y^2Z^3-X^2Y WHERE X=-2, Y=5, Z=-1
Here is my work
5*-2^2*5^2*-1^3--2^2*5
=500 - (-)20
=520
The answer from my test was -520. How is this negative?
Click here to see answer by ichudov(499)  |
Question 6173: I am having trouble understanding how the answer was arived at on the following problem:
5X^2Y^2Z^3-X^2Y WHERE X=-2, Y=5, Z=-1
Here is my work
5*-2^2*5^2*-1^3--2^2*5
=500 - (-)20
=520
The answer from my test was -520. How is this negative?
Click here to see answer by guapa(62) |
Question 6266: This is on elimination.
3x+y=1
5x-y=1
I just asked this question, and the answers that you gave me were (1/4,-3/4) And the 1/4 checks, but the -3/4 doesn't check... So now i'm really confused, because this doesn't seem right..
Click here to see answer by jst_kidding(6) |
Question 6678: If the system 2x-5y=1 and -3x+7y=-3 is to be solved by elimination of x, and the first equation is multiplied by 3, then by which number should the second equation be multiplied?
*I think that the answer is 2.Is this correct?
Click here to see answer by xcentaur(357) |
Question 6678: If the system 2x-5y=1 and -3x+7y=-3 is to be solved by elimination of x, and the first equation is multiplied by 3, then by which number should the second equation be multiplied?
*I think that the answer is 2.Is this correct?
Click here to see answer by ichudov(499) |
Question 6794: I am having a real hard time with algebra and need help with the following problem:
Find the equation for the line that passes through the indicated pair of points
(-2,-2)and(7,25)
Thanks for being there when needed
Click here to see answer by prabhjyot(164) |
Question 6159: My question says to solve the system of inequalities by graphing... and i have 10 questions on this, and no idea how to do it...So could you show me one?
y
y>-x+5
On other questions there are lines under some of the <,> signs... what does this mean, and how does this change the problem? Thanks
Click here to see answer by sslitten(5) |
Question 6917: Could you please help me with problem!
*Translanting Verbal Sentence (Algebra 1)
Twenty-three less than the difference of thirty-eight and a number n is less than eight.
I think it is!
23-38n-8
But i'm not sure
please help me
Click here to see answer by glabow(165) |
Question 6915: Hi,
I really need some help with my daughters homework. I have been away from alegbra for quite some time. Here is her problem.
A person has $100.00 to purchase 100 animals. Those animals are Horses for $10.00 each, Goats for $1.00 each, and Ducks 8 for $1.00. What formula would I use to solve this problem? I really need your help.
Thank you so much.
Click here to see answer by glabow(165) |
Question 6947: Please help me evaluate this expression when x= -2 and y= 3.
2(x-y)^2
I did this two different ways and one time i got -10 and the other time i got 50. i don't know which to distribute first, the 2 or the exponent. thanks!
Click here to see answer by longjonsilver(2297)  |
Question 7116: Please help me simplify this expression -96x+9 over -3 or -96x+9/-3 or -96x+9
________
-3
i gave you three examples because i wanted you to understand what type of problem i need you to solve. =) THANKS
Click here to see answer by Earlsdon(6294) |
Question 7283: Directions--
Simplify.
-1/2 - 2/3
-6.2 + 4.6
(-5)(7)(-3)
(-3)(-4)
56a - (-8)
I would just like to know the steps to solve these problems.
I have totally forgotten how to do it... if you can help I'd appreciate it! Thanks!
Click here to see answer by bonster(299) |
Question 7642: The sum of three consecutive even integers is -24. Find the integers. I'm having trouble with this question because i don't remember consecutive numbers AT ALL!!! i'm in 10th grade in algebra 2, but this question is Algebra 1, because we're reviewing! Please help! ASAP!!!
The sum of three consecutive even integers is -24. Find the integers. (Please show all work.)
Click here to see answer by Earlsdon(6294) |
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