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
Anika [276]
3 years ago
14

Simplify and Factorise a(a + b - c) - bc

Mathematics
1 answer:
3241004551 [841]3 years ago
5 0
<h2>{2a}^{2}  + ab - ac - bc</h2>

<u>Step-by-step explanation:</u>

= a(a + ab - c) - bc

=  {a}^{2}  +  {a}^{2}  + ab - ac - bc

=  {2a}^{2}  + ab - ac - bc

You might be interested in
After being treated with chemotherapy, the radius of the tumor decreased by 23%. What is the corresponding percentage decrease i
Crazy boy [7]

Answer:

The volume of the tumor experimented a decrease of 54.34 percent.

Step-by-step explanation:

Let suppose that tumor has an spherical geometry, whose volume (V) is calculated by:

V = \frac{4\pi}{3}\cdot R^{3}

Where R is the radius of the tumor.

The percentage decrease in the volume of the tumor (\%V) is expressed by:

\%V = \frac{\Delta V}{V_{o}} \times 100\,\%

Where:

\Delta V - Absolute decrease in the volume of the tumor.

V_{o} - Initial volume of the tumor.

The absolute decrease in the volume of the tumor is:

\Delta V = V_{o}-V_{f}

\Delta V = \frac{4\pi}{3}\cdot (R_{f}^{3}-R_{o}^{3})

The percentage decrease is finally simplified:

\%V = \left[1-\left(\frac{R_{f}}{R_{o}}\right)^{3} \right]\times 100\,\%

Given that R_{o} = R and R_{f} = 0.77\cdot R, the percentage decrease in the volume of tumor is:

\%V = \left[1-\left(\frac{0.77\cdot R}{R}\right)^{3} \right]\times 100\,\%

\%V = 54.34\,\%

The volume of the tumor experimented a decrease of 54.34 percent.

5 0
3 years ago
Please help thank you
Alenkasestr [34]

Answer:

i think its B

Step-bi think iy-step explanation:

2+3+1+2+1= 9

3+1 = 4

4/9 simplified 2/3

3 0
2 years ago
Two cards are drawn, without replacement, from a standard 52-card deck. Find the probability of each of the following events: a)
aleksandrvk [35]

Answer:

Step-by-step explanation:

given that two cards are  drawn, without replacement, from a standard 52-card deck.

a) Both cards are red

Here there are 26 red cards and 52 total cards.  

Probability = \frac{26C2}{52C2} \\=\frac{26*25}{52*51} \\=\frac{25}{102}

b) Both cards are the same color

i.e. either both are red or both are black

Hence probability = twice of part a

= \frac{2*25}{102} \\=\frac{25}{51}

c) The second card is a queen, given that the first card is an ace.

If first card is an ace remaining are 51 cards with 4 queens\

So prob = 4/51

4 0
3 years ago
7,854.209 place value
VMariaS [17]
If you are asking the place value it is thousand. if you are asking about it all it is, 7 thousand 8 hundred 54 and 2 hundred 9 thousanths.
6 0
3 years ago
What is the value of x in the equation three-fifths x = negative 45? –75 –27 27 75
scoundrel [369]

Answer:

x = -75

Step-by-step explanation:

\frac{3}{5} x = - 45 ( multiply both sides by 5 to clear the fraction )

3x = - 225 ( divide both sides by 3 )

x = - 75

8 0
2 years ago
Read 2 more answers
Other questions:
  • You have a budget of $1,000 to spend on chair rentals. Do you have enough money to rent 300 metal chair during the performance?
    7·1 answer
  • Find the derivative of f(x) = -9/x at x = 6
    8·1 answer
  • Help please asap!!!
    6·1 answer
  • Shari buys a box of 60 candles for £125
    11·1 answer
  • Square root of 250/10.<br> I don’t know how to properly ask the question so I provided a picture:
    6·1 answer
  • What is the decimal expansion of the following fraction? 1/8 A. 0.125 B. 0.125 C. 1.8 D. 0.18​
    5·1 answer
  • Simplify the expression:<br><br><br><br> 12g + 9g<br><br> 11x + 9 - 7<br><br> 8s - 11s + 6s
    7·1 answer
  • Please Help!! I really need it!​
    14·2 answers
  • If x = 0, what is the sum of<br> 4^3/x10 + 5x3^3/8x <br> in simplest form?
    9·1 answer
  • Select the correct answer.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!