Tutors Answer Your Questions about Systems-of-equations (FREE)
Question 41328: A parking lot is to be formed by fencing in a rectangular plot of land except for an entrance 12m wide along one of the sides. Find the dimensions of the lot with the greatest area. 300 m of fencing is used. Here's another word problem that I'm having some trouble with. Thanks!
Click here to see answer by Paul(988)  |
Question 42562: I need some help getting the answer on this one:
At the beginning of a bicycle race for charity, Roberto and Juana are 30 mi. apart. If they leave at the same time and ride in the same direction, Roberto overtakes Juana in 6 hr. If they ride toward each other, they meet in 1 hr. What are their speeds.
Note: The answer is in the back of the book, I just need help in getting to that answer.
Click here to see answer by fractalier(6550)  |
Question 42961: I GOT HOMEWORK FROM ALGEBRA BUT I DON'T GET IT AT ALL WE ARE LEARNING ON "SOLVING SYSTEMS BY GRAPHING AND SUBSTITUTION" BUT THAT'S THE PART I DON'T GET CAN YALL PLEASE HELP ME?
HERE'S ONE OF THE PROBLEMS THEY GAVE ME
3x + 2y=-12 & x + 2y=-2
Click here to see answer by jmg(22) |
Question 45147: -find the mass and radius of three of the nine planets in our solar system. Be sure that the masses are expressed in kilograms and the radii are expressed in meters.
-Using your data, calculate the gravitational acceleration on each of the three planets you selected. Note: With the masses measured in kilograms and the radii in meters, the units of gravitational acceleration would turn out to be meters per squared seconds.
-Use the gravitational accelerations that you calculated in Step 2 to find the period of a 2 meter long simple pendulum on each of the three planets. Note: The length of a simple pendulum is normally expressed in meters, so it is sufficient to replace L with the number 2 in the period expression
Click here to see answer by adamchapman(301) |
Question 45989: How do you solve 5x^3+54x^2-72x for x? I would like you to show each step and explain why you did each step. And I would like you to use factoring to solve the equation. Thank you so much.
Click here to see answer by Nate(3500) |
Question 46930: Question #80: The altitude of an isosceles triangle drawn to its base is 3 centimeters, and its perimeter is 18 centimeters. Find the length of its base.
I wrote down the equation for the area of a triangle, but I don't recall from College Math how to find a triangle's perimeter. Area of a triangle: A=1/2(B)(H). I'm not sure how to solve this problem. Please help!
Click here to see answer by checkley71(8403) |
Question 46992: 1. What is the determinant of the matrix [-1 2][1 3]. The [1 3] is directly under the [-1 2] in the problem. I have no idea where to begin to solve this problem.
2. The below table gives some of the values of a 5th degree polynominal p(x). Based on the values shown, what it the minimum number of real roots fot the equation p(x)=0
x 0 1 2 3 4 5 6 7
p(x) -30 22 110 150 34 -130 222 2,350
I have no idea how to begin to solve this problem.
Click here to see answer by venugopalramana(3286) |
Question 47190: Hello,
How do I solve this by the system by addition. I'm not sure how to go about it.
This is what I get,but my friend says it's wrong. I'm loss fro this point on.
5x – 3y = 13
4x – 3y = 11
+_______________
9x - 6y= 11
Click here to see answer by adamchapman(301) |
Question 48336: Find all solutions of the system: (hint: factor the left side of the second equation:
x-y = 3
x^3 - y^3 = 387
So now after factoring I have this new system:
x-y = 3
(x-y)(x^2 + xy + y^2)= 387
but now how do I continue the problem?
Thanks for all your help!
Click here to see answer by AnlytcPhil(1806)  |
Question 48916: The product of twice a number increased by 5 and the number squared is 18.
This has to be written out in an equation and then solved. So far I have...
(2n+5)[(n)(n)]=18
then I can get it as simplified as
2(n)(n)(n)+5(n)(n)=18
is this right? (sorry I can't get my computer to type powers)
PLEASE HELP ME!
Click here to see answer by checkley71(8403) |
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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, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400
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