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Question 359544: An electric power company charges its consumers $ 0.40 per kilowatt for the first 100 kilowatts in a month, $ 0.50 per kilowatt for the second 100 kilowatts, and $ 0.60 for each additional kilowatt beyond. Mary pays $ 120 for electricity used in last month.How much electricity did her family consume in the month?
Click here to see answer by ankor@dixie-net.com(22740)

Question 359665: {x|x > -8}
Click here to see answer by Fombitz(32388)

Question 359908: please can you help me to solve this equation step by step.
S=n/2(A+t) for A
Click here to see answer by robertb(5830)

Question 359908: please can you help me to solve this equation step by step.
S=n/2(A+t) for A
Click here to see answer by mananth(16946)

Question 359908: please can you help me to solve this equation step by step.
S=n/2(A+t) for A
Click here to see answer by jim_thompson5910(35256)

Question 359964: -2/3x-6=-4
How do we solve for x?
Click here to see answer by rfer(16322)

Question 359980: What dimensions give you the greatest area
Click here to see answer by rfer(16322)

Question 360192: how do you solve the equation 4x+7x=33 in linear equations
Click here to see answer by rfer(16322)

Question 360246: I need help solving y= -2x + 9
-3x + y = -1
I need to graph this and I'm aliitle confused. Can you help?
thanks in advance
T. Jones
Click here to see answer by stanbon(75887)

Question 360246: I need help solving y= -2x + 9
-3x + y = -1
I need to graph this and I'm aliitle confused. Can you help?
thanks in advance
T. Jones
Click here to see answer by rfer(16322)

Question 360274: 2x + 3y + 3z = 6
-x + y + z = 2
Click here to see answer by robertb(5830)

Question 360407: What is the answer to these 3 variables
3x+y+z=14
5x-y+5z=30
-x+2y-3z=-9
Click here to see answer by Edwin McCravy(20056)

Question 360577: The population of Johnstown is increasing linearly in time. In 2000, the population was 47. In 2006, it was 77. Let y be the populatiion and x be the year using 0 for the year 2000.
Write an equation representing this relationship.
Estimate the population in 2018.
Any advise is great appreciated!
Click here to see answer by mananth(16946)

Question 360594: Show how you would solve the following systems of equations: x + Y + Z = 6 2X � Y + 3Z = 8 3X � 2Y � Z = -17
Click here to see answer by Alan3354(69443)

Question 360764: Solve the following system of equations. (this means � find the value for X and the value for Y - they should be the SAME for each equation!)You may use the elimination or substitution method:
x � y = 1
2x � y = 5

Click here to see answer by jim_thompson5910(35256)

Question 360758: Solve 2[g(t)] if g(x) = x squared - 2x
Click here to see answer by stanbon(75887)

Question 361018: How can i solve this using Gaussian elimination method?
x+y+z=4
2x-y+3z=4
4x+2y-z=-15
Click here to see answer by Edwin McCravy(20056)

Question 361660: How do you graph linear equations?
y=2x-6
Click here to see answer by shorty4aboo(8)

Question 361788: i need help with this problem i dont know how to solve it.
The topic is System of equation
2x-3y=16
y=2/3x-4

Click here to see answer by Fombitz(32388)

Question 361785: I want to solve the following linear equation.
3(x-7)-2(x-5)=x-11
Click here to see answer by fractalier(6550)

Question 361831: Solve −9 + 24 � ( −6) the steps on how It's done.
Click here to see answer by edjones(8007)

Question 361734: An algebra teacher drove by a farmyard full of chickens and pigs. The teacher happened to notice that there were a total of 100 heads and 270 legs. How many chickens were there? how many pigs were there?
Click here to see answer by robertb(5830)

Question 361856: 5*x=3*y-4
5*y=3*x-4
Click here to see answer by Fombitz(32388)

Question 361855: 5*x=3*y-4
5*y=3*x-4
Click here to see answer by Fombitz(32388)

Question 361927: how do you translate the equation 2(3+X)=Y TO A VERBAL MODEL

Click here to see answer by checkley77(12844)

Question 362094: How to find all whole number solutions of each system using a table.

Also under the '<' in the 2nd equation, there is a line under it, symbolizing that it is an inequality.
Click here to see answer by HasanSahin(52)

Question 362314: For the following problem, the slope and one point on a line are given. Use the point-slope form to find the equation of the line. (Write your answers in slope-intercept form.)

(-8,-1), m = -1/4
Click here to see answer by rfer(16322)

Question 362309: Solve the following system of linear equations by graphing. If there is no solution, or if there is an infinite number of solutions, so state. Check your answer.
x + 2y = -4
x � y = -1

Click here to see answer by HasanSahin(52)

Question 362324: Solve the following system of linear equations by the elimination method. (If the system has no solution, enter NONE for each answer. If the system is dependent, enter INFINITELY MANY for each answer.)
2x+2y= -1
4x+4y= 0
Click here to see answer by Fombitz(32388)

Question 362322: Solve the following systems by substitution. Substitute the expression in the second equation into the first equation and solve. (If the system has no solution, enter NONE for each answer.)
x-y= -4
y= 3x+6

Click here to see answer by robertb(5830)

Question 362329: 9a-2b=c+4a solve for a
Click here to see answer by mananth(16946)

Question 362122: Please help me write an equation in point-slope form of the line that passes through the given points (1/2,-1), (-2/3,6)...I always have trouble with fractions...thanks so much!
Click here to see answer by HasanSahin(52)

Question 362513: Use the given conditions to write an equation for the line in point slope form and general form. Passing through (2,-2)and perpendicular to the line whose equation is x-3y-5=0
Click here to see answer by Fombitz(32388)

Question 362619: Ms. Anthony wants to create a special blend using two coffees, one priced ar $8.40 per pound and the other at $7.28 per pound. How many pounds of the $7.28 coffee should she mix with 9 pounds of the $8.40 coffee to sell the mixture for $7.95 per pound?
Click here to see answer by checkley77(12844)

Question 362736: every website i have went to has told me to do this problem in point slope form...and i think that it's a different answer if it's in slope intercept form??
m=-1/2 b= 5
Click here to see answer by robertb(5830)

Question 362798: Please help me solve this equation: What is the slope of the collinear poinee
Click here to see answer by Manny Pacquiao(82)

Question 362902: i need to know how to solve it with steps and graph... the first inequality is greater than or equal to
2x+1>0
3y-6>0

Click here to see answer by HasanSahin(52)

Question 362982: Find the vertex and axis of symmetry of the graph of the function.
f(x) = x2 + 4x + 3
Click here to see answer by Fombitz(32388)

Question 362981: Solve the system of equations.
x-y+z=-8
x+y+z=-6
x+y-z=4
Click here to see answer by Fombitz(32388)

Question 362921: a rope measures 168 and is cut in three peices and the first peice is one-half bigger than the second peice and the third peice is three time the second peice
Click here to see answer by mananth(16946)

Question 363093: how do you solve this using substitution or elimination:
2x=-7+3y
3x-4y=-9
Click here to see answer by ewatrrr(24785)

Question 363252: y=3x-4

Click here to see answer by JBarnum(2146)

Question 363299: how do you solve x-4/7=7x-5/21??
Click here to see answer by rfer(16322)

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