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
densk [106]
4 years ago
11

Find the * please. (2a + ∗)(2a - ∗) = 4a2–b2

Mathematics
1 answer:
mr Goodwill [35]4 years ago
8 0

Answer:

b

Step-by-step explanation:

(2a + ★)(2a - ★) =4a²-b²

If you substitute b for ★ in the equation. We have;

(2a + b)(2a - b) = 4a² - b²

4a² - 2ab + 2ab -b² = 4a²-b²

4a²-b²= 4a² - b².

So 'b' is correct

You might be interested in
What ratios are equivalent to 25:15
Andrei [34K]
25:15,20:10,15:5,10:0
3 0
3 years ago
Read 2 more answers
What is the measure of angle x?<br> 50 degrees<br> 55 degrees<br> О<br> 60 degrees<br> 80 degrees
Yanka [14]

Answer:

it may be 115 if its a quadrilateral

3 0
2 years ago
Read 2 more answers
dimensions of a building are 740 feet by 800 feet. If 1inch represents 8 feet. What are the dimensions of the building on the dr
nevsk [136]

Answer: 92.5 inches by 100 inches.


Step-by-step explanation:

1. You know that 1 inch represents 8 feet and the dimensions of the building are 740 feet by 800 feet, therefore, you must apply the proccedure shown below:

\frac{740ft*1in}{8ft}=92,5in

\frac{800ft*1in}{8ft}=100in

2. Then, as you can see, the dimensions of the building on the drawing are 92.5 inches by 100 inches.


6 0
3 years ago
Could anyone help me with these?
lora16 [44]
Part A:

Derrick is incorrect.
A yard is equivalent to 3 feet.
Thus, 20 yards will be equivalent to 60 feet.

The width is 20 yard and 2 feet. It's the same as 60 feet and 2 feet, or 62 feet. Thus, Derrick is incorrect.

Part B:

Let's calculate the area of the parking lot.

We know the width is 62 feet from part A.
The length is 30 yards, or 90 feet.

Multiply the length and width to get the area in square feet.

90 \times 62=5580

The parking lot has an area of 5580 square foot.
It costs 2 dollars per square foot to repave the parking lot. Multiply the area by 2 dollars.

5580 \times 2=11160

It will cost $11,160 to repave the whole parking lot.
4 0
4 years ago
Read 2 more answers
Obtuse angles measure greater than 90 degrees
Harman [31]

yes obtuse angles measure over 90 degrees and less 180 degrees

4 0
3 years ago
Other questions:
  • Carl is making a rectangular dog run. he has 36 one-yard sections of fence that he plans to use to keep his dig inside. he wants
    15·2 answers
  • Please solve: 26) -96 = 4(6n - 6)
    14·2 answers
  • Can anyone answer this for me?
    11·2 answers
  • 0.4 divided by -5/8 or -5/8xN=0.4 BUT LOOKING FOR N
    14·1 answer
  • Help me plz answer the pic
    10·2 answers
  • Kiara baked 30 oatmeal cookies and 48 chocolate chip cookies to package in plastic containers for her teacher
    5·2 answers
  • Jim deposited $350 into a savings account with simple interest at Hunting Bank. He left the money in his account with no changes
    10·1 answer
  • Please I really need an A on this I will let you know the answers when Im done
    15·1 answer
  • H e l p w i l l g i v e b r a i n l i e s t i f c o r r e c t !!
    13·1 answer
  • What is a perimeter?​
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!