Question

For each equation below, determine the value of y if x = -3. Homework Help

a. y=-x-5
b. y=2x2-3x-2
c. 2x-5y = 4

Answer 1

To find the value of y when x is -3, substitute -3 for x in each equation and solve for y.

Step-by-step explanation:

To find the value of y when x is -3, substitute -3 for x in each equation:

a. y = -x - 5

Substituting -3 for x, we get: y = -(-3) - 5 = 3 - 5 = -2

b. y = 2x^2 - 3x - 2

Substituting -3 for x, we get: y = 2(-3)^2 - 3(-3) - 2 = 2(9) + 9 - 2 = 18 + 9 - 2 = 25

c. 2x - 5y = 4

Substituting -3 for x, we get: 2(-3) - 5y = 4

Simplifying, we have: -6 - 5y = 4

Adding 6 to both sides: -5y = 10

Dividing both sides by -5: y = -2

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