To solve x+11=23,jasmine subtracted 11 from both sides of the equation. which property justifies this step?

C. Subtraction property of equality.

Step-by-step explanation:

By Commutative property of addition,

a + b = b + a Where a and b are any numbers,

By Addition property of equality,

a = b ⇒ a + c = b + c Where s, b and c are any number,

By Subtraction property of equality,

a = b ⇒ a - c = b - c Where s, b and c are any number,

By Associative property of addition,

a + ( b + c ) = (a + b ) + c,

Here, the given equation,

x + 11 = 23,

Her step is x + 11 - 11 = 23 - 11

Hence, by the above explanation it is clear that,

Her step justified Subtraction property of equality.

Option C is correct.

if the eqn of the parabola is f(x) = (x-4)(x+2), we need to mult. this out to find the coordinates of the vertex.

then f(x) = x^2 + 2x - 4x - 8, and f(x) = x^2 - 2x - 8.

one way in which you can find the vertex is to calculate x = -b / (2a).   here, that comes to

        )

x = = 1.   f(1) = 1^2 - 2(1) - 8 = - 9.   vertex is at (1, -9).

        2(1) 

find another point on the curve:   let x=0, for which y=-8.   then (0, -8) is on the curve.   plot the vertex and this point and draw a smooth parabola thru both.

hope this

12/11c

or

12

c

11