Question

Am I right?

Answer 1

I'd be much more interested in seeing how you got those results. But yes, you are correct.

Answer 2

@phi

Answer 3

x=-1, y=2 is one of many solutions.

if you divide the 2nd equation by 2, you will get the first equation.
in other words, the 2nd equation lies on top of the first equation (they are lines)
representing an infinite number of solutions

Answer 4

So i was right :D

Answer 5

I also did the elimination method which made them all cancel out, but I had a doubt as to what that meant so I did substitution :}

Answer 6

Nice work, phi! I'd overlooked that. Care to elaborate on this problem, perhaps using the word "coincide"?

Answer 7

if you use elimination, you will get 3 possible outcomes:
x = a number (and so does y)
the "equation" 0 = 0
or
the equation 0 = some #
0 = 0 means an infinite number of solutions
0= some # means no solution

Answer 8

yup, can u help em with another?

Answer 9

I keep forgetting this

Answer 10

plot the points. which one falls on the line ?

Answer 11

is it A ? :O

Answer 12

no C ._.

Answer 13

Total brain fart on this one ;~: City A and City B had two different temperatures on a particular day. On that day, four times the temperature of City A was 8° C more than 3 times the temperature of City B. The temperature of City A minus twice the temperature of City B was –3° C. What was the temperature of City A and City B on that day?

Answer 14

four times the temperature of City A was 8° C more than 3 times the temperature of City B.

can you change that into an equation?

Answer 15

no idea it just say, City A was 5° C, and City B was 4° C.

City A was 3° C, and City B was –1° C.

City A was 8° C, and City B was –3° C.

City A was 5° C, and City B was –5° C.

I tried to make it an equation.. but didn't work out. Maybe i did something wrong

Answer 16

let the temperature of city A be "A"
four times the temperature of City A
becomes 4A

was 8° C more than
was becomes =
8 more than becomes 8+

so far: 4A = 8+
3 times the temperature of City B becomes 3B

4A= 8+3B

Answer 17

Now do this one:

temperature of City A minus twice the temperature of City B was –3° C

Answer 18

4A - 2x = -3 ?

Answer 19

close. but it does not say four times the temp of city A

Answer 20

a - 2x = -3 ?

Answer 21

yes (I assume x is the temp of city B?... I would use "b" because it is easy to remember what variable is what)

Answer 22

How would i solve that lol ;~;

Answer 23

using A and B for the variables
4A= 8+3B
A-2B= -3

you can use elimination or substitution

Answer 24

It A :)))

Answer 25

can you help me with 3 more?

Answer 26

>.<

Answer 27

signing off... football playoffs, you know.

Answer 28

ohh kk baiii Ty for all your help :P