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

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

Question 385628: Please help me solve for y
2y=4x+6
Click here to see answer by richard1234(5390)

Question 385638: This is a percents system of equations word problem. Please help me solve it.

A chemistry student needs 40 milliliters (mL) of a 14% acid solution. She had two acid solutions, A and B, to mix together to form the 40 mL acid solution. Acid solution A is 10% and acid solution B is 20% acid. How much of each solution should be used?
I have created one equation: x + y = 40
The second equation I have written is not finished:
.1x + .2y = ????
How do I finish the second equation? And why?
Click here to see answer by ankor@dixie-net.com(15652)

Question 385901: um im really not sure of what type of problem it is but i do have a picture of the problem for you so that you can actually see
im suppose to solve the problem for x and simplify thr answer as much as possible
http://tinypic.com/r/2rmwrwg/7
Click here to see answer by mananth(12270)

Question 386316:
Given the system of equations 2x + 3y = 1 and 14x + 21y = 7, which of the following statements is true
Click here to see answer by stanbon(57347)

Question 386322: I need help to show me how to work out the use the substitution to solve the equations and state if it has no solution or infinitely many solutions: 2x+7y=3 x=1-4y
Click here to see answer by stanbon(57347)

Question 387030: What kind of system is the set of equations?
-x+4y=-3
-x+4y=-6
Click here to see answer by richard1234(5390)

Question 387165: solve a-8/12=2a+5/3
Click here to see answer by stanbon(57347)

Question 387165: solve a-8/12=2a+5/3
Click here to see answer by gwendolyn(128)

Question 387490: Hello,
Please help me solve this problem, thanks in advance.
5/2x + 1/4x=11/4+x
Click here to see answer by rfer(12660)

Question 387490: Hello,
Please help me solve this problem, thanks in advance.
5/2x + 1/4x=11/4+x
Click here to see answer by stanbon(57347)

Question 387495: Hello,
Please help me solve this problem, thanks.
(g)x=7 over 10-9x
Click here to see answer by stanbon(57347)

Question 387498: Hello,
I need help solving this problem please.
In 1990 the expectancy of males in a certain country was 61.6 yrs. In 1996 it was 65.2 yrs let E represent the life expectancy in year t and let t represent the number of years since 1990.
E(t)=?t+?
Use function in 2003 E(13)=?
Click here to see answer by stanbon(57347)

Question 387497: Hello,
Please help me solve this problem.
What is the domain of P? P(x)=xsquare-2x+1
Click here to see answer by rapaljer(4667)

Question 387500: Hello,
I need help solving this problem, thanks.
Solve by elimination method.
2r-7s=11
7r+2s=65

Click here to see answer by stanbon(57347)

Question 387502: Please help me solve this problem? Thanks
Graph
y=7/6y+2
Click here to see answer by stanbon(57347)

Question 387489: Hello,
Please help me solve this problem, thanks.
The length of a rectangle is fixed at 24cm. What widths will make the perimeter greater than 98cm?
The width must be greater than ___ cm?
Click here to see answer by robertb(4012)

Question 387499: Hello,
Can someone help me solve this problem?
The function it described H(x)=2.75x71.48 can be use to predict the height in centimeters of woman whose humerus bone is x cm long.
Predict the height whose is 35cm.
Click here to see answer by jim_thompson5910(28595)

Question 387752: I want to know how to calculate 32 to the power of 1/5
Click here to see answer by Alan3354(30993)

Question 387893: Solve each equation.
-3/x = x/-3

Click here to see answer by rfadrogane(214)

Question 388371: If x/4-a/b=0 then x is equal to?
Click here to see answer by stanbon(57347)

Question 388370: If 2ax-5x=2 then x is equivalent to?
Click here to see answer by stanbon(57347)

Question 388368: If c=2m+d, then m is equal to
Click here to see answer by stanbon(57347)

Question 388507: solve the inequality x-12>0
Click here to see answer by Fombitz(13828)

Question 386664: Please assist,
4x-y=16
x+6y=29
Thank you!
Click here to see answer by gwendolyn(128)

Question 389116: Find the dimensions of a rectangle with an area of sixty square feet and a diagonal of thirteen feet.
Click here to see answer by edjones(7569)

Question 389116: Find the dimensions of a rectangle with an area of sixty square feet and a diagonal of thirteen feet.
Click here to see answer by jerryguo41(162)

Question 387221: Can you help me solve this system? x^2+y^2=4 and y=x^2-2
Click here to see answer by robertb(4012)

Question 389508: I need to solve for a system of three variables, and this is the first time I've ever came across this so I don't really know if I'm doing this right...
So here is the system:
2x - y + 3z = 8
x - 6y - z = 0
-6x + 3y - 9z = 24
I decided to get x taken care of first so I took the middle equation and it made x = 6y + z
And then I took x and plugged it in to the top equation so it would be 2(6y+z) - y + 3z = 8 and then it went to 12y + 2z - y + 3z = 8 and then 11y + 5z = 8 and then I got y = 5/11z +8/11
Then to get z I went ahead and plugged in x and y into the third equation, (which is where I think I made the wrong move...) then I got -36y - 6z + 15/11z + 24/11 - 9z = 24
Added like terms, and then that's where I got stumped. -6z + 15/11z is 9/11z, and then when you add the -9z it makes 0/11z? and if I actually did solve for z I really wouldn't get the first solution...
Can someone please help me point out where I went wrong and help me through this problem??? Thanks!
Click here to see answer by mananth(12270)

Question 390030: 1.7y=20
Click here to see answer by jerryguo41(162)

Question 390485: how can i graph a linear system and tell how many solutions the system has
9x-3y=18
-12x+ 4y=24
Click here to see answer by richard1234(5390)

Question 390388: I need help solving:
(3x)-3(exponent)y4
------------------
-x(2exponent)y(-6 exponent)
Click here to see answer by Alan3354(30993)

Question 390655: Need help on answering this math problem please help. Thanks! f(x)=10²+5=

Click here to see answer by stanbon(57347)

Question 390706: a shipment of computer monitors, some weighing 25lb and the others weighing 40 lb each, has a total weight of 680 lb. If there are 20 monitors altogether, how many weigh 40 lb?
Click here to see answer by checkley79(3050)

Question 391152: 2x+y-z=7
2x-y+3z=13
3x+2y-z=17
Click here to see answer by haileytucki(390)

Question 391152: 2x+y-z=7
2x-y+3z=13
3x+2y-z=17
Click here to see answer by richard1234(5390)

Question 391189: x-y=1
x=1/2y+2
Click here to see answer by haileytucki(390)

Question 391189: x-y=1
x=1/2y+2
Click here to see answer by Alan3354(30993)

Question 391650: okay here is my math problem i just get stuck
question:WHAT TWO EQUATIONS WOULD YOU USE TO SOLVE THE FOLLOWING PROBLEM? the christmas talent show earned a total of $1248 for charity. if tickets costs $12 for adults and $8 for children,and there were 290 people who attended,how many of each type of ticket was sold?
so heres what ive done so far

x=adults tickets($12) the dot equals multiplied by
y=childrens tickets(8)
=290
x.y=290(1248)
x(12).y(8)=290(1248)
and thats where i get stuck

Click here to see answer by mananth(12270)

Question 392442: Stan is carrying a load of 50 boxes of books in his truck. Some of the boxes weigh 20 pounds each, and the rest of the boxes weigh 10 pounds each. If all the boxes weigh a total of 900 pounds, how many 20 pound boxes are in Stan's load?
Click here to see answer by NancyLam(35)

Question 392948: can you help me with this question?
(4x) (6,3x) M= 1/2
Click here to see answer by Alan3354(30993)

Question 392948: can you help me with this question?
(4x) (6,3x) M= 1/2
Click here to see answer by stanbon(57347)

Question 393974: graph the equation using the slope and y intercept y=9/8x+7
Click here to see answer by rfer(12660)

Question 394415: MY TASK IS TO CREATE A GRAPH/CHART TO SHOW THE FOLLOWING,
A PEDALING EXERCISE ACTIVITY BURNS 3.8 CALORIES PER MINUTE. AFTER 20 MINUTES OF PEDALING HOW MANY CALORIES WERE BURNED? HOW LONG WILL IT TAKE TO BURN 443 CALORIES. I HAVE TO WRITE AN EXPRESSION TO FIND THE TOTAL CALORIES BURNED AFTER 20 MINUTES OF PEDALING.
X SHOULD REPRESENT PEDALING TIME IN MINUTES AND Y REPRESENTS THE TOTAL NUMBER OF CALORIES BURNED. WRITE THE EQUATION RELATING TIME TO TOTAL CALORIES BURNED.
PLEASE HELP
Click here to see answer by stanbon(57347)

Question 394461: 5. If A and B are complementary angles and mA is x, which equation can be used to find y, mB?
i'm sorry this is more of a geometry question but if you love math as much as i hate it then you'll probably know how to do it... i hope so anyways... thank you!
Click here to see answer by richard1234(5390)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555