Pls help complete for y=-7x +9 how do I do this

[tex]Pls help complete for y=-7x +9 how do I do this[/tex]

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Pls help complete for y=-7x +9 how do I do this

[tex]Pls help complete for y=-7x +9 how do I do this[/tex]

a

step-by-step explanation:

the answer is a

You put the x in the x area and solve the problem.

For example:

For 0 you would do y=-7(0) + 9

Then if you do the math you get y = 9

Therefore, your answer is 9.

-7x+8y=39

x=-9

-7×-9+8y=39

63+8y=39

8y=39-63

8y=-24

y=-24÷8

y=-3

-7x + 8y = 39

when x = -9

-7(-9) +8y = 39

63 + 8y = 39

8y = 39-63

8y = -24

Divide both sides by 8

y = - 3

Hope this helps.

the sum of the lengths of any two sides of a triangle is greater than the length of the third side. if you take the three sides of a triangle and add them in pairs, the sum is greater than (not equal to) the third side. if that is not true, then it is not possible to construct a triangle with the given side lengths.

step-by-step explanation:

[tex]Which are the possible side lengths of a triangle?[/tex]

y = -3

Step-by-step explanation:

=> -7x+8y = 39

Putting x = -9

=> -7(-9)+8y = 39

=> 63+8y = 39

Subtracting 63 to both sides

=> 8y = 39-63

=> 8y = -24

Dividing both sides by 8

=> y = -3