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3 years ago

Do you guys the answer for number 3

Mathematics

1 answer:

ohaa [14]3 years ago

3 0

Answer:

the answer is L. or the last answer

Step-by-step explanation:

you have to find the total area of the place first...

which is 21*17=357

then subtract the inner area (white area) which is

14*20=280

do 357-280 to get the remaining area and the answer is 77ft^2

hope this helps.. vote, comment, thanks, and maybe mark me brainliest lol idk

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Simplify the rational expression. state any restrictions on the variable. n^4-11n^2+30/n^4-7n^2+10

Andrej [43]

For this case we have the following expression:
 $\frac{n ^ 4-11n ^ 2 + 30}{ n ^ 4-7n ^ 2 + 10} 

$
 We are going to make the following change of variables:
 $x = n ^ 2
$
Rewriting the expression we have:
 $\frac{(x ^ 2-11x + 30)}{(x ^ 2-7x + 10)} 

$
Factoring the expression we have:
 $\frac{(x-5) (x-6)}{(x-5) (x-6)} 
$
Canceling similar terms we have:
 $\frac{x-6}{x-2} 
$
Returning the change we have:
 $\frac{n ^ 2-6}{n ^ 2-2} 

$
 The resctrictions of the function are those that make the denominator equal to zero.
We have then:
 $n ^ 2-2 = 0

n = +/- \sqrt{2} 
$
 Answer:
The simplified expression is:
 $\frac{n ^ 2-6}{n ^ 2-2}$
The restrictions are:
 $n = \sqrt{2} 
$
$n = - \sqrt{2}$

7 0

3 years ago

Simplify the expression below.

Novay_Z [31]

Answer:

$\displaystyle 6$

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Step-by-step explanation:

Step 1: Define

$\displaystyle \frac{7^2 - 13}{24 - 18}$

Step 2: Evaluate

[Fraction] Exponents: $\displaystyle \frac{49 - 13}{24 - 18}$
[Fraction] Subtract: $\displaystyle \frac{36}{6}$
[Fraction] Divide: $\displaystyle 6$

5 0

2 years ago

Help please thank you

iogann1982 [59]

Equilateral

Isosceles

Scalene

Right

Acute

Obtuse

8 0

3 years ago

Multiple choice please answer please

eduard

Answer: 33.85 mm

Step-by-step explanation:

Use trigonometry, tan equation

You are give the tan angle and adjacent side, you need to find the opposite side so

T A

Tan(72)= x/11

x= tan(72) x 11

x= 33.85

8 0

3 years ago

Read 2 more answers

Explain why 7 times x/7=x. How does your answer help you solve a division equation such as x/7=2?

tatiyna

Dear Ajtocute, let's have x=9 Multiply 7 by 9 to get 63. Then, you divide 63 by 7 to get back to 9. You just cancel out the multiplication with division.

7 0

3 years ago