The first three steps for solving the quadratic equation by completing the square are as follows;
1. 
2. 
3. 
Given
The quadratic equation given as 9x^2 + 54x = 7.
<h3>Quadratic equation;</h3>
The highest power of the degree is 2 is known as a quadratic equation.
To solve using the completing the square method.
The first three steps for solving the quadratic equation by completing the square are given below.
1. Write the equation in a way that the constants are on the right side while the terms with x are on the left.

2. Make sure that the coefficient of the x^2 term is 1.

3. Adding a term to both sides that will complete the square on the left side.
This is done by dividing the coefficient of the x term by 2 and squaring it.
The same amount should be added to the right side to balance the equation.

To know more about quadratic equations click the link given below.
brainly.com/question/25963825
Answer:
measurement of angle 3 is 140 degrees
Step-by-step explanation:
angle 4 = angle 2
angle A = angle 3
angle A = 180 - angle 4 = 180-40 = 140 degrees
Answer:
Step-by-step explanation:
100 +30+2+.60 or .6
I will try to solve your system of equations.
3
x
−
4
y
=
2
;
9
x
−
12
y
=
6
Step: Solve
3
x
−
4
y
=
2
for x:
3
x
−
4
y
+
4
y
=
2
+
4
y
(Add 4y to both sides)
3
x
=
4
y
+
2
3
x
3
=
4
y
+
2
3
(Divide both sides by 3)
x
=
4
3
y
+
2
3
Step: Substitute
4
3
y
+
2
3
for
x
in
9
x
−
12
y
=
6
:
9
x
−
12
y
=
6
9
(
4
3
y
+
2
3
)
−
12
y
=
6
6
=
6
(Simplify both sides of the equation)
6
+
−
6
=
6
+
−
6
(Add -6 to both sides)
0
=
0
Answer:
Infinitely many solutions.
Answer:
Angle b is 63
Angle f is 59
Step-by-step explanation: