1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Pani-rosa [81]
3 years ago
9

Which are steps that could be used to solve 0 = 9(x2 + 6x) – 18 by completing the square? Check all that apply.

Mathematics
2 answers:
jeyben [28]3 years ago
8 0
18 + 81 = 9(x²<span> + 6x + 9)
</span><span>11 = (x + 3)</span>²

When we are completing the square, we are going to move the value of c across the equals.  We will do that by adding, and end up with

18=9(x²+6x)

We take the value of b (the coefficient of x), divide it by 2 and square it:
(6/2)²=3²=9

This is the value that completes the square.  However, since the entire square is multiplied by 9, this value must be multiplied by 9 before we can add it across the equals:
18+9(9) = 9(x²+6x+9)
18+81=9(x²+6x+9)
99=9(x²+6x+9)

Dividing both sides by 9, we have:
11=x²+6x+9

11=(x+3)²
tankabanditka [31]3 years ago
7 0
1st and 4th would be the correct  answer to the quaestion
You might be interested in
WILL MARK BRILLIANT!!! I need help ASAP
Rashid [163]

Answer:

Step-by-step explanation:

Charging by the quarter mile is for purpose of making that particular taxi service seem cheaper than the others when they post a per mile charge.  If this taxi company is charging .50 per 1/4 mile, they are charging $2 per mile.  So we will base our equation on the per mile charge, not the per quarter-mile charge.  If x is the number of mile driven (our uknown), and we have a flat fee of $2.50 regardless of how many miles we are driven, the cost function in terms of miles is

C(x) = 2x + 2.50

If we are driven 5 miles, then

C(5) = 2(5) + 2.50 so

C(5) = 10 + 2.50 and

C(5) = $12.50

It would cost $12.50 to be driven 5 miles

5 0
3 years ago
Write an equivalent expression using the distributive property: 7(2+4).
asambeis [7]

Answer:

Step-by-step explanation:

(7+4) any expression 2

5 0
3 years ago
In a warehouse, boxes have been stacked in 4 layers as shown. The workers make other stacks according to the same pattern. If a
FromTheMoon [43]

Answer:

7n

Step-by-step explanation:

6 0
3 years ago
Bryan created a scale drawing of his rectangular bedroom. His drawing had dimensions of 6 inches by 8 inches. If the scale that
vlabodo [156]

Answer:

56 feet

Step-by-step explanation:

If 1 inch = 2 feet, we can first find the actual dimensions of his room by multiplying the number of inches by 2.

6(2)

= 12

8(2)

= 16

So, the actual dimensions of his room are 12 feet by 16 feet.

To find the perimeter, use the perimeter formula, P = 2l + 2w.

Plug in the length and width:

P = 2l + 2w

P = 2(12) + 2(16)

P = 24 + 32

P = 56

So, the perimeter of his actual room is 56 feet.

6 0
2 years ago
Suppose that all of the points on the circular dartboard shown are equally likely to be hit by a dart. If the radius of the shad
jekas [21]
This must double your chances so if i round the nearest whole number would be 8 any questions?
6 0
3 years ago
Read 2 more answers
Other questions:
  • The graph begins at 620 on the y-axis.what does this value represent?is this the rate of change or the initial value
    5·1 answer
  • Rewrite using negative exponent: 5/x^2
    5·2 answers
  • given f(x)= 3 square root x-5 , g(x)= x^3+1 find g f(x). Can someone explain to me this question step by step? I don’t know why
    12·1 answer
  • Help!! Math review <br> Will give brainiest
    14·1 answer
  • Help plz<br> Edkdiuddkdkdkdjdjdhsuehehdhd
    8·1 answer
  • Please help, i need help with solving!
    8·2 answers
  • Sean keeps track of his driving so that he can take a tax deduction. Sean drove 260 miles last month, in comparison to 325 miles
    8·1 answer
  • Suppose on the first day, 80 adult, 120 student, and 20 senior tickets were sold with a total of $1,460 in ticket sales. On the
    6·1 answer
  • 2.5 What is the difference between relational understanding and instrumental​
    11·1 answer
  • Pls help I’m losing my mind
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!