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Andrews [41]
3 years ago
8

1. x² - 1 + y(y - 2x)​somebody plz help meeeeeeeeeeeeeeeeeeeeeee

Mathematics
2 answers:
Nostrana [21]3 years ago
5 0


Step1:Multiply each term in the parentheses by y.


Step2: calculate the product

lawyer [7]3 years ago
4 0

Answer:

{(x + y)}^{2}  - 1

Step-by-step explanation:

{x}^{2}  + y(y - 2x) - 1

{x}^{2}  +  {y}^{2}   - 2xy - 1

Using the identity (a - b)^2 here ,

{(x + y)}^{2}  - 1

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A study of parents of kindergarteners included 349 parents who were chosen at
miskamm [114]

Answer:

47% is the statistic and 31% is the parameter.

Step-by-step explanation:

A parameter is a quantity of a variable representing certain characteristic of a population.

A statistic is a quantity of a variable representing certain characteristic of a sample.

The sample of parents of kindergartners selected is, <em>n</em> = 345.

The School records show that only 31% of parents of kindergartners sent their children to pre-kindergarten.

That is the population proportion is, <em>p</em> = 0.31.

This is the parameter value.

Of the 349 parents, 47% said they sent their children to pre-kindergarten.

That is the sample proportion is, \hat p = 0.47.

This is the statistic value.

Thus, the correct option is:

47% is the statistic and 31% is the parameter.

7 0
3 years ago
Which value of x makes the inequality true?
grigory [225]

The answer is A.

AKA 1.6

5 0
3 years ago
Please help it’s due right now
Yuki888 [10]

Answer: hey I actually just finished learning about this in math.

Step-by-step explanation: the graph is a function, because it passes the vertical line test

7 0
3 years ago
(b) Out of 200 students in an examination of class IX, 140 passed in Maths, 120 passed in Scien
iren [92.7K]

Answer:

n(U)=200

n(M)=140

n(S)=120

n(MuS)complement=40

n(MuS)=n(U)-n(MuS)complement

=200-40

=160

n(MnS)=n(M)+n(S)-n(MuS)

=140+120-160

=260-160

=100

3 0
3 years ago
Read 2 more answers
If the diameter of a circle changes from 18 cm to 6 cm, how will the circumference change?
olga_2 [115]
The circumference when the diameter is 18 = 18pi

The circumference when the diameter is 6 = 6pi

18pi/6pi=3

The circumference will become a third of what it was.

Hope this helps!
6 0
3 years ago
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