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k0ka [10]
2 years ago
13

Which expression are differences of squares Select each correct answer

Mathematics
1 answer:
Gennadij [26K]2 years ago
4 0

Answer:

options are 3 and 4

Step-by-step explanation:

The difference of squares is defined as In option 1,

It can be written as

It is the sum of squares, therefore the option 1 is incorrect.

In option 2,

The number 40 is not a complete square of any number, therefore option 2 is incorrect.

In option 3,

It can be rewritten as

It is the difference of squares, therefore option 3 is correct.

In option 4,

It can be rewritten as

It is the difference of squares, therefore option 4 is correct.

have a good Day!

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Show that the equation represents a circle by rewriting it in standard form, and find the center and radius of the circle.
sashaice [31]
<span>5x^2 + 5y^2 + 10x − y = 0 it is the same of </span>
<span>x^2 + y^2 + 2x −1/5y = 0
and then </span>
(x + 1)^2 - 1+  (<span><span>y−1/10)^2  -1/100=0
</span> </span>(x + 1)^2 +  (<span>y −1/10)^2  =(101/100)

the center is C(-1, 1/10), and the radius is R= sqrt(101)/10
</span>
4 0
3 years ago
PLEASE HELP ME QUICK what is the simplified form of x+9/x+1 + x-2/5?
Ira Lisetskai [31]

Answer:

A

Step-by-step explanation:

C and D are both wrong for the same reason. The denominator should be (x +1)*5 which means that either A or B is correct.

C and D have an error seldom seen on Brainly. It means that the denominator has been added rather than multiplied but even the addition is a little strange. Frankly, I don't know what has to be done to get either of them.

So the answer is

numerator: 5*(x + 9) +  (x + 1)(x - 2)

denominator: 5*(x + 1)

Simplify the numerator. Remove the brackets.

numerator: 5x + 45 + x^2 - 2x + x - 2               Gather like terms

numerator: x^2 + 5x - 2x + x + 43                      Simplify

numerator: x^2 + 4x + 43

Answer

x^2 + 4x + 43

==========

5(x + 1)


7 0
3 years ago
PLEASE HELP THANKS!!
mafiozo [28]

Answer: a) x = 5   b) x = 12

Step-by-step explanation: For each one you just do the inverse to get it on the other side of the equal sign. For example x + 3 = 8 would be like this :

1. x + 3 = 8

2. x + 3 - 3 = 8 -3

    ( + 3 - 3 cancels out)

3. x = 5

       

6 0
3 years ago
Read 2 more answers
If there are 18 circles, how many squares are there?
Westkost [7]

Well if there's 18 circles no cap off limit to the squares then you can put any amount of squares from on to infinity here are some ideal ones

18 circles 12squares = 30 shapes

18 circles 8 squares = 26 shapes

18 circles 20 squares = 38 shapes

6 0
2 years ago
Heavy rain in Oxford caused the Brandywine Creek to rise. The creek rose three inches the first day,
Lady bird [3.3K]

Answer: Well, their were 15 inches on the 5th day or if you add them all up 48 inches total.

Step-by-step explanation:

5 0
2 years ago
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