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
hjlf
3 years ago
5

The product of (a − b)(a − b) is a2 − b2. A. Sometimes B. Always C. Never

Mathematics
1 answer:
Damm [24]3 years ago
8 0

(a-b)(a-b)=a^2-2ab+b^2\\\\a^2-2ab+b^2=a^2-b^2\\2b^2=2ab\\b^2=ab\implies a=b \vee b=0

So, sometimes.

You might be interested in
100x100x100 i don't know this
kotykmax [81]

Answer:

1000000

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
The surface areas of two similar hexagonal prisms are 882cm² and 1,058 cm²? What is the scale factor of the smaller
max2010maxim [7]

Answer:

scale factor of the smaller  prism to the larger prism is B. 21/23

Step-by-step explanation:

Given

surface areas of two similar hexagonal prisms are 882cm² and 1,058 cm²?

scale factor is ratio of sides of two similar objects

thus scale factor for given prism will be = side of smaller prism / side of larger prism

in general rule

If shape of solid has scale factor of k

scale factor of area = k²

scale factor of volume = k³

_____________________________

Given in the problem area of two prism is given

we know area = side^2

scale factor of area = k²

k^2 = area of smaller prism / area of larger prism

k^2 = 882 / 1058 = 441/529\\k = \sqrt{ 441/529} \\k = 21/23

Thus, correct option is B 21/23.

7 0
3 years ago
There are 20 small tropical fish swimming in a 55-gallon aquarium. What is the population density?
umka21 [38]

Answer:

The population density is 0.364 fish per gallon.

Step-by-step explanation:

The population density can be defined as the number of individuals (in this case, small tropical fish) per unit of area or volume. In this case, the volume of the aquarium (55 gallon).

The density can be calculated then as:

d=\dfrac{P}{V}=\dfrac{20\;\text{fish}}{55\;\text{gal}}\approx0.364\dfrac{\text{fish}}{\text{gal}}

The population density is 0.364 fish per gallon.

5 0
3 years ago
Write a fraction that is less than 1/3 using 1 as a numerator. Then explain why the answer you chose is less than 1/3.
sammy [17]
1/4, because in 1/3, you would only need 3 parts to get one whole, but in 1/4, you would need 4 parts to get a whole. 
3 0
3 years ago
To decrease an amount by 19% multiply by
yawa3891 [41]
Think of the original amount as 100%
If we want 100% of something we multiply by 1
To get from 100% to 1, we divide the percentage by 100
Decrease 100% by 19%
100% - 19% = 81%
Then to get the multiplier, divide by 100
81% / 100 = 0.81
To decrease by 19%, multiply by 0.81
6 0
3 years ago
Other questions:
  • A certain car rental location charges a daily fee as well as a mileage charge. On one trip a businessman rented a car for the da
    6·1 answer
  • a private university is accepting applications for enrollment.Out 2000 applicants 950 meet the GPA requiremnets,600 volunteer fo
    8·1 answer
  • I need this to be solved plzzzz
    14·1 answer
  • Write an equation that involves
    6·2 answers
  • Is(5, 6)a solution to the inequality<br> y &lt; 2x + 4 ?
    11·1 answer
  • <img src="https://tex.z-dn.net/?f=2%20%2B%20y%20%3D%201" id="TexFormula1" title="2 + y = 1" alt="2 + y = 1" align="absmiddle" cl
    11·2 answers
  • .........help.......me.......please
    8·2 answers
  • 2x and 3x are like terms
    13·1 answer
  • I need help ! please help asap ! &lt;3
    11·1 answer
  • Name the plane that is highlighted in the diagram below
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!