Question

Given that the line Ax+By+10=0 is parallel to the line 3x+y=7 and meets the line x+4=7 on the x-axis, find the value of A and B..??

Answer 1

How do i do this??

Answer 2

@mathmate @jim_thompson5910

Answer 3

do u know??

Answer 4

maybe...

Answer 5

since the lines r parallel, the slope is -3

Answer 6

so A is 3

Answer 7

wait how A=3

Answer 8

because the line is parallel to 3x + y= 7
parallel lines have the same slope

Answer 9

B is 1

Answer 10

so a=3 and b = 1

Answer 11

there r ur answers : )

Answer 12

r u sure??

Answer 13

yes i am sure, of course i am

Answer 14

@jim_thompson5910

Answer 15

jackthegreatest is correct

Answer 16

so we take the slope and use it for A?

Answer 17

Anything parallel to Ax+By+10=0 will be of the form Ax+By = C where C is some fixed number

Using numbers

anything parallel to 3x+y=7 will be in the form 3x+y = C

Answer 18

ok and since y=1 we use that for B?

Answer 19

the coefficient for y is 1, yes

Answer 20

ok

Answer 21

so if we had 4x+5y=7
then A=4 and B=5?

Answer 22

yeah because the left side of a standard form equation stays the same when you have parallel lines

Answer 23

ok thank u both.. @jackthegreatest and @jim_thompson5910

Answer 24

np

Answer 25

np