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vovangra [49]
3 years ago
10

Replace ∗ with a monomial so that the result is an identity:(5x + ∗)(5x − ∗) = 25x2–0.16y4

Mathematics
1 answer:
Eddi Din [679]3 years ago
5 0

Answer:

0.4y²

Step-by-step explanation:

25x² - 0.16y⁴

(5x)² - (0.4y²)²

(5x - 0.4y²)(5x + 0.4y²)

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The perimeter of a rectangle is 54 feet. The area of the rectangle is 176 square feet. Find the dimensions of the rectangle.
Murrr4er [49]

11 by 16

Explanation:

Set up two equations

2

x

+

2

y

=

54

x

×

y

=

176

Solving the first equation for x

2

x

+

2

y

−

2

y

=

54

−

2

y

this gives

2

x

=

54

−

2

y

Divide both sides by 2

(

2

x

2

)

=

54

−

2

y

2

This gives.

x

=

27

−

y

putting this value into the second equation gives.

(

27

−

y

)

×

y

=

176

multiplying across the parenthesis gives

27

y

−

y

2

=

176

subtracting 176 from both sides gives

is

27

y

−

y

2

−

176

=

0

multiplying by negative one gives

−

27

y

+

y

2

+

176

=

0

factoring this into y gives

(

y

−

11

)

×

(

y

−

16

)

=

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Solving for both y's gives

y

=

11

,

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16

6 0
2 years ago
Which is 2/3 of 18 <br>A. 27<br>B. 8<br>C. 12<br>D. 6
ahrayia [7]

Answer:

C. 12

Step-by-step explanation:

We know you have the number 18 and the fraction 2/3. The problem is we want to find out what 2/3 of 18 is. Well, if 18 divided by the denominator of that fraction (3) is 6 than we just add 6 because the question is asking for 2/3 NOT 1/3.

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Jamila has to purchase a new car and is putting 1 over 3
iris [78.8K]
I did the work and it's D. i believe
8 0
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G(a) = a + 2. Find f(-7).
anastassius [24]

Answer:

Step-by-step explanation:

g(-7) = -7 + 2 = -5

6 0
3 years ago
I need this done ASAP
Mandarinka [93]

Answer:

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6 0
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