Questions on Algebra: Systems of equations that are not linear answered by real tutors!

Tutors Answer Your Questions about Systems-of-equations (FREE)

Question 62881: y=3x
x+2y=-21
Click here to see answer by checkley71(8403)

Question 62910: In 2000, about 33.1 billion photos were printed from film and that number was declining at a rate of 1.1 billion per year. There were 2.8 billion digital photos printed or stored in 2000 and that number was growing at a rate of 2.9 billion per year.
a) Write two equations that can be used to predict n, the number of filmed or digital photos, in billions, t years after 2000.
b) Use a graphing calculator to determine the year in which the numbers of filmed photos and digital photos are the same.
Click here to see answer by stanbon(57347)

Question 62967: Is sqrt (x^2) = x an identity (true for all values of x)?
Explain your answer
Click here to see answer by stanbon(57347)

Question 62966: Solve the following equations.
a) sqrt x - 1 = 3
b) sqrt (x^3) = 8
c) ^3 sqrt (x^2) = 4
Click here to see answer by uma(370)

Question 63322: 3x + 17 - 5x = 12 - (6x + 3)
Click here to see answer by checkley71(8403)

Question 63370: How do I solve this problem using system of equations?
x^2 + y^2 = 25
y^2 + x = 5
Click here to see answer by funmath(2925)

Question 63519: I have to solve the problem by using substitution Method. If the problem has no solution or an infinite solution or an answer.
1. x + 7Y = 16
-3X + 6Y= 33
2. X + Y = 1
X + Y = 2
This problem has to be sloved by equations by any method.
8x + 9 = -5y
-3x + 3y = -21
In a recent game Will scored 42 points on a combination of 18 two and three point baskets. How many shots of each type were made?

Click here to see answer by stanbon(57347)

Question 63540: I have a couple of questions. The first one I would like you to help me finish.
I am supposed to find 2 complex numbers whose sum is 1 and whose product is 5. So far I have:
x+y=1
xy=5
since y=1-x I substitute it for y in xy=5
x(1-x)=5
x-x^2=5
x^2-x=-5 this is where I am stuck. I believe I am supposed to use 1/2b^2 in the equation somewhere, I just don't know how.
The next nonlinear equation I would like help with is:
x^2+xy+y^2=12
x+y=2
Thank you very much.
Click here to see answer by ptaylor(2048)

Question 63562: {2,-1,6/2,(sqrt)2,3.14(pi),5/3}
Which are rational numbers, whole numbers, real numbers and irrational?
Click here to see answer by joyofmath(189)

Question 63595:
5*3-5
--------
1/2- -3/4
Click here to see answer by stanbon(57347)

Question 63604: Can you please help me solve using the substitution method?

x + 7y = 16
-3x + 6y = 33
Click here to see answer by ankor@dixie-net.com(15652)

Question 63751: Hi! I nees some help with this equation...My dad is an avid fisherman. He catches an average of 1.35 pounds of walleye an hour. If he fishes for 12 hours next Saturday. How many pounds of walleye should he catch?
thanks
Click here to see answer by stanbon(57347)

Question 63754: The greenhouse I am building for my wife is 6 feet longer than it is wide. Write an algebraic expression for the perimeter if the length is expressed as X. If X equals 20, what is the perimeter?
Click here to see answer by praseenakos@yahoo.com(507)

Question 63750: I need some help rewriting this expression using the distributive property:
8x-40y
Thanks in advance for your help
Click here to see answer by praseenakos@yahoo.com(507)

Question 63797: Would someone please help me solve this problem:
y-xy=-10
x-2y=-7
Thank you.
Click here to see answer by stanbon(57347)

Question 63948: Hi! I need some help solving this equation....
2-|6-8|+5
3(----------) + (sqrt)9+16
4-5*2

Thanks in advance for your help
Click here to see answer by funmath(2925)

Question 63976: Hi! I need some help solving this equation... X=4,Y=-3 and Z=2

x^3+2y-z
Heres what I have...4^3+2(-3)-2
64+(-6)-2
56
Click here to see answer by tutorcecilia(2152)

Question 64017: 6X-9Y+3Z ---------- 3 WOULD I BE CORRECT IN THINKING THAT WOULD BE 2X-3Y+Z? THANKS!

Click here to see answer by sarahschober(35)

Question 64017: 6X-9Y+3Z ---------- 3 WOULD I BE CORRECT IN THINKING THAT WOULD BE 2X-3Y+Z? THANKS!

Click here to see answer by Edwin McCravy(8909)

Question 64015: I need to simplify 6.7x(3x-2y)+1.2(x^2-y^2)
Heres what I have completed 20.1x^2-13.4xy+1.2x^2-1.2y^2 = 21.3x^2-1.2y^2-13.4xy
Click here to see answer by Edwin McCravy(8909)

Question 64013: Hi! I need some help with this problem.....3(a-b)+2(a+3b)-4(a-2b)
Heres what I have so far....3a-3b+2a+6b-4a+8b
= a+11b

Thanks!
Click here to see answer by stanbon(57347)

Question 64059: simplify 3(a-b)+2(a+3b)-4(a-2b)
Click here to see answer by praseenakos@yahoo.com(507)

Question 63987: Hi! I need some help with this problem... Let X=4,Y=-3 and Z=2
XY^2 - 3Z^2
-----------
(XY)^2 (-3Z)^2
Heres what I have so far but it doesn't look right...
4*(-3)^2 - 3(2)^2
------------------
(4*-3)^2 * (-3*2)^2
4*9 - 3*4
----------
144 * 36
36-12
-----
144*36
24
------
5184
1
----
216

Thanks in advance for your help!!
Click here to see answer by 303795(595)

Question 63982: can you help me graph the function, identify the graph of the function (line, parbola,hyperbola, or exponential), explain the choice,give the domain and range, and also the domain and range of the entire function?
x is -2, -1, 0, 1, 2
y is .25, .5, 1, 2, 4

Click here to see answer by stanbon(57347)

Question 63672: Simplify
3(a-b)+2(a+3b)-4(a-2b)
Click here to see answer by tutorcecilia(2152)

Question 64153: THE difference between two different numbers in 1 {write in algebraic expressions both} and the sum of two different numbers is 14?
Click here to see answer by checkley71(8403)

Question 64111: Hi! Could someone please help me with this problem.
Let x=4,y=-3 and z=2
xy^2-3z^2
-----------
(xy)^2(-3z)^2
Click here to see answer by checkley71(8403)

Question 64209: {2,-1,6/2,(sqrt)2,(pi),5/3
My question is which of these numbers are rational? and which are whole numbers?
For rational numbers I have 5/3 but my teacher said there were 3 more
For whole numbers I have 2,6/2,-1 and she said there should be one more
Thanks for your help
Click here to see answer by stanbon(57347)

Question 64214: If f(x)= 1/3x^3 + 1/3x^2 + 1/3x + 1/3 and g(x)= x^2 + 1/3x + 1
calculate final answers as rational (fraction) numbers reduced to the lowest terms.
PLEASE HELP...THIS PROBLEM IS VERY CONFUSING. I WOULD APPRECIATE IT A LOT!
Click here to see answer by stanbon(57347)

Question 64212: suppose the profit for producing x of an item is given by:
P(x)= 3/100x^2 - 7x + 6x^3/5 + 6000
Find the marginal profit for each of the following values of x. Round final answers to the nearest penny
a. x= 10
b. x= 300
c. x= 1000
d. x= 20,000
PLEASE HELP...I'M NOT SURE HOW TO START I REALLY DO HOPE YOU CAN HELP....THANK YOU SO MUCH
Click here to see answer by stanbon(57347)

Question 64260: Page 385 problem #3

y=3x

y=x squared - 4
Click here to see answer by funmath(2925)

Question 64370: could you help me sketch the graph of the solution to: x^2+y^2or=x-1. Also if you don't mind, please do the same with x>or=|y|, y>or=|-3|, 2y-x
Click here to see answer by stanbon(57347)

Question 64427: hi! I need someone to check to make sure I did this problem correctly...
3(x-6)=(2x-7)4
Heres what I have
3x-18=8x-28
+28= +28
------------
3x+10=8x
-3x =-3x
----------
10=5x
2=x
Click here to see answer by stanbon(57347)

Question 64543: Use interval notation for the solution sets
|5x-1|<11
Heres what I have
5x-1<11 -(5x-1)<11
5x<12 -5x+1<11
x<12/5 -5x<10
x>10
No solution

Is this correct?
Click here to see answer by stanbon(57347)

Question 64629: x-0.04(x-10)=96.4
Click here to see answer by tutorcecilia(2152)

Question 65042: Hi! I need someone to please check my work on this. X=4, Y=-3, and Z=2
1. Is 3x-2y+z>(or equal to)19?
3(4)-2(-3)+2>(or equal to)19
12(-6)+2>(or equal to)19
20>(or equal to)19
YES
2. Is 3(x+4y)<(or equal to)z
3(4+4(-3)<(or equal to)2
-3(4+-12)<2
-12+36<2
24<2
NO

3. Is -3(x+4y)>z
-3(4+4*-3)>2
-3(4+-12)>2
-12+36>2
24>2
YES

Click here to see answer by funmath(2925)

Question 65045: My brother Jim is an avid fisherman. He catches at least 1.35 ponds of walleye an hour.If he fishes for 12 hours next saturday,how many pounds of walleye he should catch?
Thanx Mike
Click here to see answer by tutorcecilia(2152)

Question 65046: The greenhouse I am building for my wife is 6 feet longer than it is wide.I only have enough concrete for 56 feet of foundation(the number of feet in the foundation is equal to the perimeter of the building).What are the possible values for the length of the building?
Click here to see answer by cristiana(10)

Question 65154: Can you solve this;

Four times the measure of the complement of angle B is 12 more than twice the differance between the measures of its supplement and complement. Find the measures of angle B.
Click here to see answer by stanbon(57347)

Question 65270: Melinda Bowen recieves an annual income of $234.50 from investing one amount of money at 6% and another amount at 5%. If the investments were interchange, her income would increase by $5.50. Find the amounts she invested.

I know the amounts please help me find the 2 equations.
Click here to see answer by stanbon(57347)

Question 65043: Write an expression for the value of a savings account which has more than double the amount of another.
Thank you Mike
Click here to see answer by checkley71(8403)

Question 65277: Write the equation of a line perpendicular to y=4x-2 and passing through the point (4,2)
Thanks
Click here to see answer by checkley71(8403)

Question 65276: Write the equation of a line with slope -4/5 and a Y intercept of 4

Thanks in advance for your help
Click here to see answer by checkley71(8403)

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