4 years ago

Solve for substitution Y+5x= -3 3y-2x= 8

2 answers:

8 0

1.) Y+5x= -3
Substitute 0 for x
Y +5(0)= -3
Multiply 5 by 0
Final Answer: y= -3

2.) 3y-2x= 8
Substitute 0 for y
3(0) - 2x= 8
Multiply 3 by 0
-2x= 8
Divide both sides by -2
Final Answer: x= -4

Viefleur [7K]4 years ago

7 0

I could be wrong but i thing it is
y= -4
x=-2

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A • (-3,-4) B • (5,2) C • (11,-6) What is BC? A.) 10 B.) 8 C.) 3 D.) 5

guapka [62]

Answer:

A.) 10

Step-by-step explanation:

So draw the points on a graph is the best way to solve the problem, but if you can't then you have to mentally imagine it.

on the X axis B is 5 and C is 11 so the distance or length of the line between the points is 11-5=6

on the Y axis B is 2 and C is -6 so the distance or length of the line between the points is 2-(-6)=8

now you have two lines that can make a right triangle and use the Pythagorean theorem to solve for the long line connecting directly from point B to point C $x^{2}$ + $y^{2}$ = $z^{2}$ so $6^{2}$ + $8^{2}$ =100= $z^{2}$ , z= $\sqrt{100}$ =10