Question

which ordered pair is a solution of this equation?
-7x-5y=42. explain.

Answer 1

@Directrix

Answer 2

What are the ordered pairs? Do you have a list of them?

Answer 3

you mean like choices?

Answer 4

I suppose so. All I know is that your question says "which ordered pair" and I don't see any ordered pairs.

Answer 5

ohh yeah hold on

Answer 6

idk theres
- (-6,0 )
- (0,-5 )
- (-5,0)
-(0,-6)

Answer 7

there ^

Answer 8

how do i figure that out though

Answer 9

like the one earlier
you have (x, y)
substitute the values for x an y on the left hand side of the equation and simplify. if your answer is the same as on the right hand side then that pair (x, y) is a solution.
do this for each group.

Answer 10

i'll do the first one.

Answer 11

ohh so i can solve the choices and see if it matches the graph or equation?

Answer 12

-7x-5y=42
(-6, 0) x = -6 and y = 0
left hand side
-7(-6)-5(0) = 42 -0 = 42
right hand side = 42
42 = 42 therefore (-6, 0) is a solution

Answer 13

okay let me write these steps down so i wont forget and i can try some on my own

Answer 14

i still dont understand the steps, like i need more explanation with steps

Answer 15

put the options in
\(\large\tt \begin{align} \color{black}{
-7x-5y
}\end{align}\)

and see by which option u get \(42\)

Answer 16

example 1st option (-6,0)
\(\large\tt \begin{align} \color{black}{
-7x-5y\\
=-7\times -6-5\times 0\\
=+42-0\\
=42
}\end{align}\)

so first option is the ordered pair

Answer 17

i need the steps first

Answer 18

^

steps

Answer 19

oh i see

Answer 20

what is
\(\Large -6\times -7\)

Answer 21

idk :(

Answer 22

its \(\Large +42\)