Questions on Algebra: Linear Equations, Graphs, Slope answered by real tutors!

Tutors Answer Your Questions about Linear-equations (FREE)

Question 62187: I am confused as to solving this linear equation. Should I add them or solve them seperately and how?
2x+7y=11
5x-3y=7.
Thank you.
Click here to see answer by ankor@dixie-net.com(22740)

Question 62355: how could i make a system of equations (2) for this problem: sue is 4 years younger than sally. in 3 years sally will be twice as old as sue. how old are they now?
Click here to see answer by joyofmath(189)

Question 62352: theres a collection of nickels and quarters worth $4.65. theres 3 more nickels then quarters. how many coins are there??
Click here to see answer by joyofmath(189)

Question 62345: two cars leave town @ the same time going in opposite directions. one is going at 25 km/h and the other at 45 km/h. in how many hours will they be 210 km apart??
Click here to see answer by joyofmath(189)

Question 62380: -4+y-1
Click here to see answer by checkley71(8403)

Question 62361: an airplane flew for 4 hours against a headwind of 40km/h. on its return the same wind was a tailwind and the flight took 3 hours. whats the planes speed in still air?? what two system of equations could i do?
Click here to see answer by stanbon(75887)

Question 62360: find the slope of each line. if the line has no slope, say no.
19) 3x-5y=10
Click here to see answer by funmath(2933)

Question 62356: Linear growth: Using checkerboard -

Square 1 has 20 Rubas; Square 2 has 25 Rubas; Square 3 has 30 Rubas; Square 4 has 35 Rubas...
Write an equation for the relationship between the number of the square, n, and the number of rubas, r.
How do you write this equation?

Click here to see answer by checkley71(8403)

Question 62351: theres a jar of nickels and dimes that has $6.75. theres 84 more nickels than dimes. how many nickels and how many dimes are there?
Click here to see answer by checkley71(8403)

Question 62342: There were 150 tickets sold for a school play. tickets for students were $2.00 and adults $3.00. the total amount of money made was $150. how many more student tickets were sold than adult? what equation(s) couldja make for this? using x and/or y??
Click here to see answer by checkley71(8403)

Question 62344: an airplane flew for 6 hours with a tailwind of 60 km/h. the return flight against the same wind took 8 hours. what is the speed of the airplane in still air??? this one i think i'm gonna need a system of equations to figure it out and i wanna use x and y....ummmmmm.....help plz!
Click here to see answer by bryanpark428(4)

Question 62403: introduction to Algebra......for my son!!! HELP!!!
Recall the perimeter of a rectangle is the sum of its side lengths.
a. Make a table of all possible whole-number values for the length and width oa a rectangle
with a perimeter of 24 meters.
HELP!!! IS THERE ANYONE ONLINE NOW??
HE NEEDS THIS BY TOMORROW MORNING!!
ITS 9:30 PM HERE, IN WASHINGTON!!!
THANK YOU!!!
CAN YOU DIRECT ME TO A WEBSITE PERTAINING TO THIS TYPE OF MATH???
THANKS AGAIN!! YOU PEOPLE ROCK!!!
JO JO
Click here to see answer by stanbon(75887)

Question 60369: Find the maximum value of y = -x^2 + 6x. The answer I got was 8 but it was not correct.
Click here to see answer by 303795(602)

Question 62203: Hello,
At a total lost with this one.
Can you pls complete the given ordered pairs so that each ordered pair satisfies the given equiation?
(0, ),( ,0),(-6, ),( ,5),2x + 3y = 5
Thank you for your time in this matter.
Click here to see answer by ankor@dixie-net.com(22740)

Question 62501: find the slope and y intercept of each line. #3 y=1/2x-3 i'm stuck
Click here to see answer by funmath(2933)

Question 62512: Hello
with the substitution how do i solve:
2x - y = 3
6x - 9 = 3y
thank you
Click here to see answer by josmiceli(19441)

Question 62549:
FIND AN EQUATION FOR THE LINE WITH y-INTERCEPT 3 THAT IS PERPENDICULAR TO THE LINE Y= 2/3x-4.
Click here to see answer by funmath(2933)

Question 62171: Can you help me solve these equations using the substitution method?
1) x-y=15; y=-4x

2) 5x+3y=0 ;x+y=0

Can you help me solve these equations using the elimination method?
1) a+b=4; -a+2b=-8

2) x+4y=-3; 4x+y=-9
3) 8x+2y=3;x-7y=19

Click here to see answer by ankor@dixie-net.com(22740)

Question 62594: Can u pls help with this problem? thanks
Find the the y-intercept of the line passing through (2,3) which is perpendicular to the line through the points (6,7) and (6,18).
Click here to see answer by venugopalramana(3286)

Question 62593: how do you do this equation? 14=2x???? i dont understand it!
Click here to see answer by 303795(602)

Question 62513: Help!!!!
Graph the following equations; calculate the slope, x-intercept, and y-intercept, and label the intercepts on the graph.
7.1x - 3.9y = 1.4

Click here to see answer by funmath(2933)

Question 62455: Find the equation of the plane which contains the line:
(x,y,z) = (0,2,-3) + t(-3,3,0)
and is parallel to the line:
(x,y,z) = (-1,-3,0) + t (-1,-2,3)
Write your answer in the form A x + -1 y + C z = D, and give the values of A, C and D as your answer.

Click here to see answer by venugopalramana(3286)

Question 62651: hello,
with the substitution method, how do i show whether its independent, inconsistent or dependent:
y = 3x + 11
3x + 3y = 0
tks!
Click here to see answer by stanbon(75887)

Question 62653: hello
can you show how to find the slope and y-intercept for each line:
1) y= -3x +4
2) 2y - 3x + 1 = 0
tks!
Click here to see answer by stanbon(75887)

Question 62654: how do you solve 5x + 2y =12

m= b=
Click here to see answer by funmath(2933)

Question 62453: Let P1 be the plane defined by the points:
(-1,-2,-3), (-3,1,-5) and (2,-5,-4)
Find the equation of the plane perpendicular to P1 and containing the line:
(x,y,z) = (2,-2,-3) + t (2,-3,0)
Your answer should be in the form Ax + By + Cz - D = 0.

Click here to see answer by venugopalramana(3286)

Question 62667: hello
how do you figure the slope of any line that is perpendicular to the line through
(-3, 5) and (4,-6)
Tks!

Click here to see answer by uma(370)

Question 62669: Hello
For the life of me, i get different results with the substitution method,
the textbook answer is -3, 2 Independent for the following:
y = 3x + 11
3x + 3y = 0

i come out with y= 11/4, x=11/4?????

Click here to see answer by josmiceli(19441)

Question 62452: Find the equation of the plane containing the line L1, and parallel to the line L2, where:
L1: (x,y,z) = (-2,-1,1) + t (-3,0,2).
L2: is the intersection of the planes 2x-2y-3z=-5 and 1x-3y-3z=-3
Write your answer in the form -4x+By+Cz=D, and give the values of B, C and D as your answer.

Click here to see answer by venugopalramana(3286)

Question 60365: If f(x)= x^2 + 5, find f(a + h) - f(a).
I haved tried to work this problem and the answer I got was 2ah + h^2 + 10, but it is not correct.
Click here to see answer by 303795(602)

Question 62730: I have to grap the given inequality, but I don't know what steps to take? Can someone help me?
3x � 4y < 12

Click here to see answer by stanbon(75887)

Question 62729: Graph the boundary line for the given linear inequality. Determine the correct half-plane, and complete a graph on the following equation:
y>3
I know I have to replace the inequality with an equal sign, but isn't this problem more or less solved? There are no more variables to solve for, but how do I do this problem?
Click here to see answer by stanbon(75887)

Question 62734: I am supposed to re-write the equation to be a function of x??

-3x + 4y = 11
Click here to see answer by 303795(602)

Question 62733: I am to graph the given inequality, Argh!!
4x + y ≥ 4
Click here to see answer by ankor@dixie-net.com(22740)

Question 62755: DETERMINE THE VERTEX OF y=x2-8x+22.
Click here to see answer by jai_kos(139)

Question 62755: DETERMINE THE VERTEX OF y=x2-8x+22.
Click here to see answer by uma(370)

Question 62754: WHAT IS THE MAXIMUM VALUE OF y=-x^2+6x?
This is a quadratic with a=-1 and b=6
The maximum point occurs when x=-b/(2a)
x=-6/(-2)=3
When x=3, y= -3^2+6(3)=9
Maximum at (3,9)
Cheers,
Stan H.
Click here to see answer by uma(370)

Question 62759: GIVE THE EQUATION FOR THE CIRCLE WITH CENTER C(3,-2) AND RADIUS 4.
Click here to see answer by uma(370)

Question 62761: WHAT IS THE x-INTERCEPT AND y-INTERCEPT OF THE EQUATION 5x-3y=30?
Click here to see answer by jai_kos(139)

Question 62761: WHAT IS THE x-INTERCEPT AND y-INTERCEPT OF THE EQUATION 5x-3y=30?
Click here to see answer by uma(370)

Question 62763: IF f(x)=x(x+3)(x-1), USE INTERVAL NOTATION TO GIVE ALL VALUES OF x WHERE f(x)>0.
Click here to see answer by jai_kos(139)

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