Questions on Algebra: Graphs, graphing equations and inequalities answered by real tutors!

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Question 125907: Find the axis of symmetry. y = �x^2 � 8x + 1
Click here to see answer by jim_thompson5910(35256)

Question 126008: Can you help me solve this: The line tha tis parallel to x-2y+7+0 and contains (-4,0).
Click here to see answer by josmiceli(19441)

Question 126021:
The length of a rectangle is 10 in. more than twice its width. If the perimeter of the rectangle is 38 in., find the width of the rectangle.
Click here to see answer by checkley71(8403)

Question 126019: Janet invested $13,000, part at 13% and part at 6%. If the total interest at the end of the year is $1,200, how much did she invest at each rate?
Click here to see answer by marcsam823(57)

Question 126025: Find the point of intersection of f(x)=3/2x + 12 and g(x)=-1/2x + 4 by graphing.
thanks,
Click here to see answer by checkley71(8403)

Question 126025: Find the point of intersection of f(x)=3/2x + 12 and g(x)=-1/2x + 4 by graphing.
thanks,
Click here to see answer by josmiceli(19441)

Question 126022: One number is 12 more than another. The sum of the smaller number and twice the larger number is 39. Find the larger number
Click here to see answer by marcsam823(57)

Question 126022: One number is 12 more than another. The sum of the smaller number and twice the larger number is 39. Find the larger number
Click here to see answer by josmiceli(19441)

Question 126020: Solve the system by addition or substitution.
16x � 4y = �12
y = 3 + 4x

Click here to see answer by MathLover1(20849)

Question 126088: Solve the system by graphing
x + y = 3
x + y = �1
Click here to see answer by jim_thompson5910(35256)

Question 126084: Ellen has a total of 100 coins in her jar. the coins inside the jar are either quarters or dimes. the total amount in the jar is $22.00, how many of each type of coin is in the jar? Use Q for quarters and D for dimes.
Click here to see answer by checkley71(8403)

Question 126091: Solve the system by addition.
2x � 4y = 7
4x + 2y = 9

Click here to see answer by jim_thompson5910(35256)

Question 126093: Solve the system by graphing.
2x + y = 4
x + y = 3

Click here to see answer by jim_thompson5910(35256)

Question 126090: Solve the following system of linear inequalities by graphing
x � 3y > 6
3x + 2y > 12
Click here to see answer by jim_thompson5910(35256)

Question 126092: true or false: (-5, 3, -2) is a solution to the equation 2x+3y-z=1
Click here to see answer by checkley71(8403)

Question 126107:
Solve the system by graphing.
x + y = 4 �x + y = 2

Click here to see answer by checkley71(8403)

Question 126113: Solve the system by graphing.
3x + y = 6
3x � y = 0

Click here to see answer by stanbon(75887)

Question 126108:
Solve the system by addition.
5x � 4y = �5 x � 2y = �7

Click here to see answer by checkley71(8403)

Question 126106:
Solve the system by graphing.
3x + y = �1 9x + 3y = �3

Click here to see answer by jim_thompson5910(35256)

Question 126106:
Solve the system by graphing.
3x + y = �1 9x + 3y = �3

Click here to see answer by checkley71(8403)

Question 126112: Solve the following system of linear inequalities by graphing.
3x � y < 2
x + y > 2

Click here to see answer by jim_thompson5910(35256)

Question 126116: Graph the inequality.
x � y > 2

Click here to see answer by jim_thompson5910(35256)

Question 126120:
Solve the system by graphing.
x + y = 3
x + y = �1

Click here to see answer by jim_thompson5910(35256)

Question 126119: Graph 3x + y = 3.

Click here to see answer by jim_thompson5910(35256)

Question 126118: Graph the inequality.
x < �2

Click here to see answer by jim_thompson5910(35256)

Question 126117: Graph x = �3.
Click here to see answer by jim_thompson5910(35256)

Question 126123: How would I write the equation of the line has the indicated slope and contains the indicate point m=1/2 (3,5) ? What equation and could you please show the work I spent 45minutes
Click here to see answer by jim_thompson5910(35256)

Question 125396: Simplify each of the following expressions.(2x+y)+(-x-3y)
i am just lost
Click here to see answer by marcsam823(57)

Question 126146: Given f(x) = 3x + 3, find f(a + 1).
please help
Click here to see answer by marcsam823(57)

Question 126150: Graph f(x) = �2x + 4.
please help
Click here to see answer by jim_thompson5910(35256)

Question 126151: Solve the system by graphing.
3x � y = 1
3x � y = 2
please help
Click here to see answer by jim_thompson5910(35256)

Question 126147: Solve.
6x + 4(3x � 2) = 6x + 2

please help
Click here to see answer by jim_thompson5910(35256)

Question 126154: Write the equation of the line that passes through point (6, 4) with a slope of 2.
i need some help
Click here to see answer by jim_thompson5910(35256)

Question 126152: Solve the following system of linear inequalities by graphing.

x-2y>=4
x<=4
please help
Click here to see answer by jim_thompson5910(35256)

Question 126145: which of the following is not an expression.
a.) x+2y
b.) a+b+c
c.) ab=6
d.) 4(y+1)
e.) none of the above
thanks for your help
Click here to see answer by ilana(307)

Question 126168: An 18-ft board is cut into two pieces, one of which is 4 ft longer than the other. How long is each piece?
please show work!!

please help
Click here to see answer by ilana(307)

Question 126170: Find the slope of the line passing through the points:(3, 9), (3, -5)
Click here to see answer by ilana(307)

Question 126170: Find the slope of the line passing through the points:(3, 9), (3, -5)
Click here to see answer by josmiceli(19441)

Question 126156: Are the following lines parallel, perpendicular, or neither?
L1 with equation x – 6y = 24
L2 with equation 6x + y = 6

Click here to see answer by scott8148(6628)

Question 126167: Solve the following system. If a unique solution does not exist, state whether the system is inconsistent or dependent. 2x-y=4, 2x-y=6

Click here to see answer by scott8148(6628)

Question 126245: Solve each of the following systems by graphing.
x-2y=8
3x-2y=12
Click here to see answer by checkley71(8403)

Question 126199: Angus invested $18,000, part at 3% and part at 5%. If the total interest at the end of the year is $660, how much did he invest at each rate?
Click here to see answer by checkley71(8403)

Question 126224: | 2x - 7 | > 10 (problem)
(my wrong answer)
2x-7>\(10)
2x-7>10
2x>17
x>(17)/(2)
2x-7<-(10)
2x-7<-10
2x<7-10
2x<-3
(2x)/(2)<-(3)/(2)
x<-(3)/(2)
x>(17)/(2) or x<-(3)/(2) *needs interval notation do not forget*
problem:
| 4x + 2 | (greater than or equal to sign) 6

4x+2>=\(6)
4x+2>=6
4x>=4
x>=1
4x+2<=-(6)
4x+2<=-6
4x<=-2-6
4x<=-8
(4x)/(4)<=-(8)/(4)
x<=-(8)/(4)
x<=-2
x>=1 or x<=-2 *wrong needs interval notation do not forget*
what am I doing wrong??

Click here to see answer by stanbon(75887)

Question 126285: 6x+4y=16
Click here to see answer by lauren_x3(3)

Question 126285: 6x+4y=16
Click here to see answer by JessicaGill(40)

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