Question

Systems of equations with the same slope and different y intercepts have no solution.
Sometimes
Always
Never

Answer 1

6.03] The three Math Idol judges have been eliminating contestants all day! The number of one-step equations and two-step equations who have been eliminated today is equal to 840! If three times the number of one-step equations minus twice the number of two-step equations is equal to 870, how many one-step equations auditioned today?

330

510

520

660

Also this...

Answer 2

sometimes

Answer 3

Can you explain why

Answer 4

Please?

Answer 5

if it has the same slope then the lines are parallel and this means they never cross. when you solve a system you find the point at which the lines intersect and since they never intersect there isn't going to be a solution all the time

Answer 6

Oh..okay thank you! I need to pass this course this year! :)
Do you know the answer to...
6.03] The three Math Idol judges have been eliminating contestants all day! The number of one-step equations and two-step equations who have been eliminated today is equal to 840! If three times the number of one-step equations minus twice the number of two-step equations is equal to 870, how many one-step equations auditioned today?

330

510

520

660

Answer 7

I'll be your fan if you want...:)

Answer 8

you could try to look it up on google, i just started algebra this year

Answer 9

Do you understand that question? Oh...you started algebra! Me too! Online.

Answer 10

create system of equations in x and y where x = one-step and y = two-step equations.

Answer 11

all i have got so far is 3x-y=870 where x is one-step equations and y is two-step equations

Answer 12

x + y = 840

Answer 13

Yeah...but this qestion is weird! :(
Can somone tell me the answer and tell me how to work it out?

Answer 14

3x - 2y = 870

Answer 15

x - 1-step
y - 2-step

x + y = 840
3x - 2y = 870

--Use substitution--
3(840 - y) - 2y = 870
--Solve for y--
y = 330
--plug y in the first equation--
x + 330 = 840
--solve for x--
x = 510

found it here: http://answers.yahoo.com/question/index?qid=20100529231454AAAiKbc

Answer 16

So the answer is 510?

Answer 17

yeppers

Answer 18

Ok...thank you! :) I got it now! :)

Answer 19

x + y = 840
3x-2y = 870
multiply first equation by 3:
3x + 3y = 2520
3x - 2y = 870
subtract
5y = 1650
y = 330
= 2 step


one step x = 840-330 = 510

Answer 20

Ok, I become both of you guy's fans! :)

Answer 21

oh ok
i used the elimination method
pounce used the substitution method

Answer 22

6.03] What is the value of the x variable in the solution to the following system of equations?

3x + 2y = 8
2x + 3y = 2

4

−2

x can be any number as there are infinitely many solutions to this system

There is no x value as there is no solution to this system

Do you guys know this problem?

Answer 23

i used the google method actually

Answer 24

True True! :)

Answer 25

pounce - are u sure about the first question? - sometimes?

Answer 26

What I hate is all these essay questions you have to type up! :(

Answer 27

http://answers.yahoo.com/question/index?qid=20100706070044AAlGiiq

Answer 28

i put sometimes?? i meant always!!

Answer 29

Ok, I got that one! :) Thanks! You guys are very helpful!:)

Answer 30

ok

Answer 31

for the first one its always not sometimes my mistake

Answer 32

right

Answer 33

Okay, I fixed it just now!
6.03] Part 1: Decide whether you would use the graphing, substitution, or elimination method to solve the following system of equations. Explain, in complete sentences, why you chose that method.
Part 2: Solve the following system of equations and show all of your work.

2x + 5y = −3
−15x − 5y = −10

Answer 34

http://answers.yahoo.com/question/index?qid=20110728095221AAj2cv9

i feel so helpful!!

Answer 35

Yes, with google (narrows eyes) JK! You are very helpful!

Answer 36

elimination is best method for this
you only need to add the 2 equations
and y is eliminated

Answer 37

-13x = -13
x = 1

Answer 38

Thank you! You guys are very helpful! Anything you need help with?

Answer 39

yw

Answer 40

:)

Answer 41

i need help woth one thing:
is f(x)=-2/1 the same thing as y=-2/1?

Answer 42

Is it mulitple choice or an essay question?

Answer 43

neither its asking to write an equation in function notation form and i got -2/1

Answer 44

Oh, can you put the original ? here I can see it. :)

Answer 45

It kinda is the same because they both equal -2/1, but also different sice you have to find 2 equations for one of them and 1 for the other.

Answer 46

thanks