X-y=-3
please answer this right

x +3 = y

Step-by-step explanation:

So you are looking for mx + b = y

m is the slope

b is the initial value

Try to isolate the y variable

x - y = -3

Subtract x from both sides

-y = -x - 3

Multiply everything by -1 to make the y value positive

y = x + 3

answer: i think it's a

step-by-step explanation:

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15