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KengaRu [80]
3 years ago
6

Which of the following is the correct expansion of (3x-y)2

Mathematics
1 answer:
GREYUIT [131]3 years ago
4 0
6x-2y (I believe so)
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Joseph had started saving quarters,dimes,nickel and penny but is unable to give the
Sladkaya [172]

Answer:

$3.49

12 quarters,4 dimes,1 nickle, 4 pennies

Step-by-step explanation:

First remember that;

Quarter=25 pennies

Dime=10 pennies

Nickel =4 pennies

I cent =0.01$

Given the amount as $3.50

Assume you use 4 quarters, this means a whole dollar, so it will be;

1 dollar = 4quarters

3 dollars=?

cross multiply

3×4=12 quarters

The remaining $0.49

Here identify 40 cents, which is 40 pennies

But 10 pennies=1 dime

so 40 pennies=?

cross-multiply

(40×1)÷10=4 dimes

and a nickel for 4 pennies.

7 0
4 years ago
7y ^3 −7x^3 +4−5+6−3x^3 +6x^3<br>Combine Like Terms
snow_lady [41]

Answer:

-4x^3 + 7y^3 + 5

Step-by-step explanation:

7y^3 - 7x^3 + 4 - 5 + 6 - 3x^3 + 6x^3     Given

7y^3  - 7x^3 - 3x^3 + 6x^3 + 4 - 5 + 6     Rearrange

7y^3 - 4x^3 + 5                                        Combine the like terms

or

-4x^3 + 7y^3 + 5                                       Answer

8 0
4 years ago
What is 3 less than -2
Anastasy [175]
-2 - 3 = -5
The answer is negative 5.
4 0
3 years ago
Amtrak s annual passenger revenue for the years 1980 2000 is modeled approximately by the formula R = -40 |x - 11| + 990 where R
Alecsey [184]

Answer:

<h2>1986, 1996</h2>

Step-by-step explanation:

       Given, Annual passenger revenue for the years 1980 to 2000 id=s modeled with the formula R=-40|x-11|+990.

Here, R is the annual revenue in millions of dollars, x is the number of years since January 1, 1980.

       Revenue in a year was $ 790 million.

So, R=790\\-40|x-11|+990=790\\40|x-11|=200\\|x-11|=5\\x-11=5\text{ (or) }x-11=-5\\x=16\text{ (or) }x=6

       So, after 6 yrs and 16 yrs from January 1, 1980, the Passenger revenue equals $ 790 million.

∴ Passenger revenue equals $ 790 million in 1986 and 1996.

3 0
3 years ago
What is the factored form of 2x3 + 4x2 – x?
AleksandrR [38]
Looking at the expression, we see that the only common factor shared between these three terms is x.

We factor out x:
x(2x2 + 4x - 1)

We can no longer find any common factors, so this is the final answer.
8 0
3 years ago
Read 2 more answers
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