Answer:
Step-by-step explanation:
You're given a coordinate in the form of (x, y) and you're also given the vertex in the form of (h, k). We will use those in the vertex form of the equation
and solve for a. Filling in:
which simplifies a bit to
and a bit more to
. Add 3 to both sides to get
-8 = 4a so
a = -2
The equation, then, is

Im gonna assume you are solving for x, the equation (x + 3)2 = 49 x is equal to 21.5 or 21 and 1/2. however the rest aren’t equations they’re just x = number and there isn’t much to do with that
2 x 3 = 6
55 + 6 = 61
It's probably a 2-step problem
to multiply and add
Observe the figure given.
Given: ABCD is a parallelogram.
To prove: ABCD is a rhombus
Statement
1. ABCD is a parallelogram. AC bisects
.
Reason: Given
2. 
Reason: Definition of an angle bisector
3. 
Reason: Reflexive property of congruence
4. 
Reason: ASA Postulate
5. 
Reason: corresponding parts of congruent triangles are equal.
6. 
Reason: Opposite sides of the parallelogram are congruent.
7. 
Reason: Transitive property of congruence
8. ABCD is a rhombus
Reason: Definition of rhombus