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

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Question 221185: Single Women. The percentage of women in the 20-24 age group who have never married went from 55% in 1970 to 73% in 2000 (Census Bureau, www.census.gov). Let 1970 be year 0 and 2000 be year 30.
a.) find and interpret the slope of the line through the points (0, 55) and 70, 73).
b.) find the equation of the ine in part (a).
c.) what is the meaning of the y-intercept?
d.) use the equation to predict the percentage in 2010
e.) if this trend continues, then in what year will the percentage of women in the 20-24 age group who have never married reach 100%
Click here to see answer by stanbon(57377)

Question 221188: How do you sketch this by hand without a calculator.
y=|2x^3+x^2-4x+1|
I know you disregard the modules and first graph it normally but it seems to have overwhelmed me.
Click here to see answer by Alan3354(30993)

Question 221278: Graph the inequality on a plane. I do not get how to do these problems, I always get them wrong no matter how many times I try them.
x+y<3
Click here to see answer by stanbon(57377)

Question 221279: Solve the system of equations by graphing. Then classify the system.
3x+ y=15
4x+5y=-13

Click here to see answer by drj(1380)

Question 221275: hi, i'm having trouble in sketching a graph of a function
the function is y = 2x^2 -11x +12
i don't know where to start, do i factorise the equation?
if i do factorise it i will get (x-1.5)(x-4) where do i go from that? :S
thank you!
Click here to see answer by Alan3354(30993)

Question 221470: graph the linear equation
x-5y=-3
Click here to see answer by checkley77(12569)

Question 221588: What is the slope and y-intercept of y = -2/3 x -12
Click here to see answer by drj(1380)

Question 221636: Graph the following and put your answer in set builder notation and interval notation. 3 > z - 1
Click here to see answer by stanbon(57377)

Question 221706: how do I find the x-intercept and y-intercept for this problem. 10x+20y=120
Click here to see answer by rfer(12666)

Question 221830: How do you graph a piecewise-defined function that has the lines y = 2x+3 and
y = 3-x?
Click here to see answer by stanbon(57377)

Question 221913: How do I write an equation of a line segment with domain and range?
Click here to see answer by solver91311(16897)

Question 222030: hi how can i find the answer to a question like 2y - 4x = 8 and then decide whether the given ordered pair (-2,8). i think i have to find if x=? and y= ? and the two ? will b the numbers -2 and 8, but im not sure. canyou help me? thank you!
Click here to see answer by checkley77(12569)

Question 222104: hi there... ... i have a simple question, but it is hard for me... i have to find three DIFFERENT ordered pairs for the problem X = 2 and all i can get is (2,0) can you help me find the other 2 please? thank you
Click here to see answer by solver91311(16897)

Question 222126: Im not quite grasping the consept of graphing im having trouble with
2x+y=5
3x-y=10
it tells me to solve by graphing can u plz help
Click here to see answer by checkley77(12569)

Question 222126: Im not quite grasping the consept of graphing im having trouble with
2x+y=5
3x-y=10
it tells me to solve by graphing can u plz help
Click here to see answer by rfer(12666)

Question 222227: we need to come up with an equation based on a set of coordinates. The "x" coordinates are: 0,1,2,3,100. All the y coordinates are 3. How do we solve this?
Click here to see answer by solver91311(16897)

Question 222324: determine the values (write a compound inequality) of x that gives the triangle below a perimeter of no more then 100 and no less than 28. for the
left side of triangle 4(x-3)
right side of triangle 3x
bottom of triangle 5x + 4
Click here to see answer by solver91311(16897)

Question 222416: i am having trouble understanding how to graph an equation and identify the y intercept for x +2y=10
Click here to see answer by rapaljer(4667)

Question 222379: Graph the equation using the slope and the y-intercept.
y=9/7x + 5
Use the graphing tool to graph the line. Use the slope and y-intercept when drawing the line.
Click here to see answer by jim_thompson5910(28598)

Question 222022: okay, i just dont know how to graph this problem.
|n+8|>=3
my work was:
n+8>=3 n+8>=-3
-8 -8 -8 -8
n>=-5 n>=-11
now what?
Click here to see answer by ankor@dixie-net.com(15659)

Question 222605: I have to make a vertical line with (4,5). How do I do that?
Click here to see answer by drj(1380)

Question 222665: 2<-p/4

Click here to see answer by rfer(12666)

Question 222680: I really need help on this equation. p(t = 1) = -2, for t

Click here to see answer by Alan3354(30993)

Question 222794: 3x-2y+2=0
x+3y=14
Click here to see answer by drj(1380)

Question 222816: 2x-3y-7 in standard or slope intercept form
Click here to see answer by Alan3354(30993)

Question 222913: Write equations for the vertical and the horizontal lines passing through the point (8,6) in (X.Y) -coordinates.
vertical line:
horizontal line:
Click here to see answer by rapaljer(4667)

Question 222734: I need help getting:
T/4 >(underlined) -1/4
And problems such as those.
Click here to see answer by edjones(7569)

Question 222994: I am having some problems understanding the laws of logs
How does Ln sqrt of 2 = Ln2 over 2
All I come up w/ is 1/2 Ln 2
Click here to see answer by Alan3354(30993)

Question 223044: please help me solve: find the slope & y-intercept
f(x)=-8x-2
the slope is ?
the y-intercept is (0,?)
Click here to see answer by rfer(12666)

Question 223047: please help me solve: 5/8x+1/16x=9/16+x
the solution is x=?
*these are fractions is the problem*
Click here to see answer by rfer(12666)

Question 223062: use the intercepts to graph the equation
x+4y=8
Click here to see answer by rfer(12666)

Question 223063: find the slope if it exist of the line containing the pair of points
(2,5) and (10,-3)
the slope m=?
*answer is integer or fraction
Click here to see answer by rfer(12666)

Question 223065: y=-4/5+3 must have 3 linear points
I think one is (0,3) and another is (5,7)
Click here to see answer by rfer(12666)

Question 223105: x - 2y = 4
Click here to see answer by Alan3354(30993)

Question 223231: I need a real-world example when the solution of a system of linear equations must be in the first quadrant. What do I need to know?
Click here to see answer by drj(1380)

Question 223229: Find the slope if it exsits on the line.
(-2,3) and (-2,-5) m=?
Click here to see answer by rfer(12666)

Question 223405: 2x+6/3=10
Click here to see answer by rfer(12666)

Question 223413: graph the equation y-3x=0
Click here to see answer by jim_thompson5910(28598)

Question 223443: I'm trying to help my son with his homework and im failing! I use to know how to do this, we have a graphing calculator bu and but i can't remember how to use it. The problem is and we have to graph it and find the domain, range, increasing, decreasing, maximum. minimum, x-intercept, y intercept, vertex, zeros, transformations, end behavior. Ther is also a chart given the value of x to be -2, -1,0, 1,2
Click here to see answer by scott8148(6628)

Question 223588: how do i solve this?:
2x-y=50, when y=18
Click here to see answer by checkley77(12569)

Question 223799: use the intercepts to graph the equation
x+2y=4
Click here to see answer by drj(1380)

Question 223789: graph the equation using the slope and the y-intercept y=5/3x+7
Click here to see answer by rfer(12666)

Question 223837: solve using addition and multiplication principle
9+7x<36
Click here to see answer by drj(1380)

Question 223840: please help me solve 0.3x+4<0.7x-3
the inequaility sign is the less then equal to sign
Click here to see answer by rfer(12666)

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