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
Anvisha [2.4K]
3 years ago
14

Expand and simplify 9 (x-y)^2-9(x+y)(x-y)

Mathematics
1 answer:
yuradex [85]3 years ago
5 0

To simplify the problem it would be: -18xy+18y^2

You might be interested in
Six sophomores and 14 freshmen are competing for two alternate positions on the debate team. Which expression represents the pro
Elanso [62]

Answer:

<em>Choose the first alternative</em>

\displaystyle P=\frac{_{1}^{6}\textrm{C}\ _{1}^{5}\textrm{C}}{_{2}^{20}\textrm{C}}

Step-by-step explanation:

<u>Probabilities</u>

The requested probability can be computed as the ratio between the number of ways to choose two sophomores in alternate positions (N_s) and the total number of possible choices (N_t), i.e.

\displaystyle P=\frac{N_s}{N_t}

There are 6 sophomores and 14 freshmen to choose from each separate set. There are 20 students in total

We'll assume the positions of the selections are NOT significative, i.e. student A/student B is the same as student B/student A.

To choose 2 sophomores out of the 6 available, the first position has 6 elements to choose from, the second has now only 5

_{1}^{6}\textrm{C}\ _{1}^{5}\textrm{C} \text{ ways to do it}

The total number of possible choices is

_{2}^{20}\textrm{C} \text{ ways to do it}

The probability is then

\boxed{\displaystyle P=\frac{_{1}^{6}\textrm{C}\ _{1}^{5}\textrm{C}}{_{2}^{20}\textrm{C}}}

Choose the first alternative

7 0
3 years ago
Read 2 more answers
Estimate 3 3/8 X 10 13/15
ivanzaharov [21]

Answer:

36.70

Hope this helps!

7 0
3 years ago
Read 2 more answers
Simplify the expression (1/x^2 + 2/y)/(5/x - 6/y^2)
ozzi

Answer:

y(y+2x^2)/x(5y^2-6x)

Step-by-step explanation:

7 0
3 years ago
Pls help! given: -2(x-4)=2x+12 Prove: x=-1
nata0808 [166]

Answer:

X= -1

Step-by-step explanation:

In pic

(hope this helps can I pls have brainlist (crown) ☺️)

7 0
2 years ago
A man is 30 years older than his son. In 6 years'
solniwko [45]

Answer:

the man (Dad) is 36 years old and the boy (Son‍) is 18 years old

Step-by-step explanation:

3 0
3 years ago
Other questions:
  • Two equations are given below: m + 4n = 8 m = n - 2 What is the Solution ?
    11·1 answer
  • What is the value of x for part A and part B
    13·1 answer
  • You just got a free ticket for a boat ride, and you can bring along 3 friends! Unfortunately, you have 5 friends
    5·1 answer
  • In 1982 John Hinckley was on trial, accused of having attempted to kill the then US President Ronald Reagan. Hinckley was found
    14·1 answer
  • If tan x =1/2<br> find sin x<br> 2
    14·1 answer
  • If you reflect the coordinates (1,4) across the y-axis what would be the new<br> coordinates? *
    13·2 answers
  • Four baskets contain scented soaps. The baskets contain 9, 9, 11, and 15 soaps. If the soaps are divided evenly among the basket
    13·1 answer
  • HELP??????????????????!!!!!!!!!!!!!
    6·2 answers
  • What is 5.06 times 2.10. Pease show work
    5·1 answer
  • Choose the correct answer in each number.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!