Questions on Algebra: Equations answered by real tutors!

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Question 361701: solve each equation if the domain is (-2,-1,1,3,4)

8x+4y=12
Click here to see answer by Fombitz(32388)

Question 361783: 4-z=5
Click here to see answer by Fombitz(32388)

Question 361812: If the quotient of a number and 15 is added to 1/5, the result is 7/15. Find the number.
Click here to see answer by robertb(5830)

Question 361810: Recall that two angles are complementary if the sum of their measures 90 degrees. Find the measure of two complementary angles if one angle is nine times the other angle.
Smaller angle=?
Larger angle=?
Click here to see answer by mananth(16946)

Question 361801: I need help with this problem Topic is System of Linear Equation
3(x-7)-2(x-5)=x-11
Click here to see answer by jim_thompson5910(35256)

Question 361937: I need a formula to find r ( top radius) of a frustum given h 108cm,R(bottom radius)1.1m weight 8200Kg(density of concrete 2400Kg/m^3
I have been given V = 1/3 pi h (R^2+Rr+r^2)
I am just so stuck !!!!!
Click here to see answer by Fombitz(32388)

Question 361889: can someone help me solve this problem? 3x-4<11
Click here to see answer by checkley77(12844)

Question 362056: If 9 is added to three times a number, the result is 1 more than the number. Find the number.
I have written the problem like this I'm not sure if this is correct:
9+3(x)=
Click here to see answer by ewatrrr(24785)

Question 362061: -14s - 52= 39 - s
Click here to see answer by ewatrrr(24785)

Question 362091: A high-speed rail service connects London, England, Paris, France, and Brussels, Belgium. One of the high-speed trains travels about 233 miles from London to Brussels at a speed of about 87 miles per hour. How long does the trip take?
Click here to see answer by checkley77(12844)

Question 362076: I need help to solve this problems.
-6=2/3z
5/9p=-10
Click here to see answer by checkley77(12844)

Question 362070: N-12=3N
Click here to see answer by checkley77(12844)

Question 362068: (8m-2n)(3m+8n)
Click here to see answer by checkley77(12844)

Question 362108: using multiple steps solve following:
(6a-4)= 8
______
7
Click here to see answer by checkley77(12844)

Question 219681: 3v-9=7+2v
Click here to see answer by loka305(1)

Question 362225: y=-3x+9
how do I begin

Click here to see answer by Alan3354(69443)

Question 362250: how do you solve this equation:-12=2+5v+2v
Click here to see answer by nyc_function(2741)

Question 362269: well, im doin a project about two stepp equations and i can't seem to find a problem with the answer of 12, can u give me a problem that i can answer and the answer will be 12?
Click here to see answer by edjones(8007)

Question 362274: 14-9x=-8(10+x)
Click here to see answer by robertb(5830)

Question 362289: Envelope stuffing. Every week, Linda must stuff 1000
envelopes. She can do the job by herself in 6 hours. If
Laura helps, they get the job done in 5 1/2 hours.
How long would it take Laura to do the job by herself ?

Click here to see answer by mananth(16946)

Question 362300: 64x^5+48x^4+24x^3 divided by 8x^4

Click here to see answer by robertb(5830)

Question 362348: How do you know when an equation has infinetly many solutions, and when an equation has no solution?
Click here to see answer by Fombitz(32388)

Question 362303: (3x^4)^2(2x)^-1
Click here to see answer by Fombitz(32388)

Question 362381: Given f(x) = -2x^2 + 12x - 5 I must complete the square and put in the form y = a(x - h)^2 + k
-2x^2 + 12x = 5
x^2 - 6x = -5/2
x^2 - 6x + 9 = 13/2
(x - 3)^2 = 13/2
x - 3 = sqrt(13/2)
x = 3 +/- sqrt(13/2)
From here, how I would put this into the standard form? I have h = -b/2a = 3 and k = (c-b)^2/4a = -289/8 (?)
Not sure how I would enter x, wouldn't there be two of them?
Thanks for any help you can provide :-)
Click here to see answer by Fombitz(32388)

Question 362390: During a chemical reaction, the temperature in the beaker decreased every minute by the same number of degrees. The temperature was 16�C at 11:08 A.M. By 11:43 A.M., the temperature had dropped to -17�C. By how many degrees did it drop each minute?
the answer I came up with was 1.06 but i have no clue
Click here to see answer by mananth(16946)

Question 362413: Please solve this algebra equation:
V+9 divided 3 + 8
Click here to see answer by mananth(16946)

Question 362362: 4M-4=M AND P-1=5P+3P-8 THANKS
Click here to see answer by Fombitz(32388)

Question 362507: Two bicyclists ride in opposite directions. The speed of the first bicyclist is 5 miles per hour faster than the second. After 2 hours they are 70 miles apart.Find their rates.
Click here to see answer by josmiceli(19441)

Question 362505: An airplane flies from New Orleans, Louisiana, to Atlanta, Georgia, at an average rate of 320 miles per hour. The airplane then returns at an average rate of 280 miles per hour. The total travel time is 3 hours. How long did it take to fly from New Orleans to Atlanta?

Click here to see answer by Alan3354(69443)

Question 362569: 5a-5=7+2a.
4y-2=6y+6.
5t-5=5t+7
Click here to see answer by jim_thompson5910(35256)

Question 362626: I need a equation and slope of the line problem, like 8x+4y=12. I only need one more. Thanks
Click here to see answer by rfer(16322)

Question 362690: The perimeters of two triangles are equal. Find the side lengths of each triangle:
Triangle 1
a-b 2x + 4
b-c 2x + 3
c-a 2x
Triangle 2
p-q 2x
q-r 2x
r-p 3x + 1

Click here to see answer by jim_thompson5910(35256)

Question 362728: how do i do the steps to sovle this probem: 1/6(a-4) = 1/3 (2a+4)............. i have had so much trouble with math some how i ened up in algebra and i shouldnt be so yea please help
Click here to see answer by robertb(5830)

Question 362739: How do you solve the eguation:
1-g+5-2g+3(g-2)?
Click here to see answer by Alan3354(69443)

Question 362791:
Click here to see answer by Manny Pacquiao(82)

Question 362790: Good evening, I'm having trouble determining how to find the x-intercepts of the following function:
Click here to see answer by Manny Pacquiao(82)

Question 362788: -8+6=-2
Click here to see answer by Manny Pacquiao(82)

Question 362808: Good evening.
Click here to see answer by Manny Pacquiao(82)

Question 362730: how do i solve this problem :1.03-4 = -2.15p+8.72...... thanks
Click here to see answer by rfer(16322)

Question 362817: A=P
Click here to see answer by Manny Pacquiao(82)

Question 362853: Good evening, I'm having trouble determining how to find the x-intercepts of the following function:
y = 2(x-3)^2 - 23
I found the y-intercept by setting x to zero:
y = 2(0-3)^2 - 23
y = 18-23
y = -5
However, I know I'm not finding the x-intercepts correctly, as I'm only coming up with one x-intercept using the quadratic equation:
x = [12 +/- sqrt(144 - 4(2)(18))] / 2(2)
x = (12 +/- 0)/4
x = 3
Could you let me know how I should be finding the x-intercept? Thanks so much for sharing your knowledge with us students :)

Click here to see answer by mananth(16946)

Question 362859: 4n+9=61
Click here to see answer by jim_thompson5910(35256)

Question 362859: 4n+9=61
Click here to see answer by rfer(16322)

Question 362859: 4n+9=61
Click here to see answer by mananth(16946)

Question 362859: 4n+9=61
Click here to see answer by robertb(5830)

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