Simply plug in -15 for x in our given equation.
-x + 2y = -1
-(-15) + 2y = -1
Simplify.
15 + 2y = -1
Subtract 15 from both sides.
2y = -1 - 15
Simplify.
2y = -16
Divide both sides by 2
Y = -8
Hope I helped :)
To estimate the answer of 872*3 we know that 872 is only 28 away from 900 so we'll round 872 up to 900. Then we can take 900*3 which is 2,700. So we now know that 872*3 is roughly 2,700.
Hope this helps!=)
3x-4=13
First you want all your x's on one side, and all your ordinary numbers on the other.
Add four to both sides to get rid of the "-4" part on the left.
Your new equation is 3x = 17
Divide each side by 3 to find X.
x= 17/3 or 5 2/3
Answer: (x, y) transforms into (-x, y)
Step-by-step explanation:
When we do a reflection over a given axis, the distance between the initial point to the axis must be the same as the distance of the reflected point to the axis.
So if we do a reflection over the y-axis, then the value of y must be fixed.
So if we start with the point (x, y), the only other point that is at the same distance from the y-axis is the point (-x, y)
So the rule is, the y value remains equal and the x changes of sign.
3 * x = 28
Divide by 3.
3x / 3 = 28/3
x = 28/3
So, 3 * 28/3 = 28.