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Sindrei [870]
3 years ago
14

Help with number 8 please

Mathematics
1 answer:
Mrrafil [7]3 years ago
7 0
The answer would be 1440 feet^2, becasue for area you have to multiply the width, length, and depth.  You bascally would draw a 3D rectangle and label the depth, height, and width. That would be your diagram. 
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Which sum is equal to the expression - 5x3 + 2x2 + 9x+2/<br> (x²+ 2)²
Makovka662 [10]

Answer:

Option C

Step-by-step explanation:

Given expression is \frac{-5x^3+2x^2+9x+2}{(x^2+2)^2}

Option A

\frac{A}{x^2+2}+ \frac{Bx+C}{(x^2+2)^2}

= \frac{A(x^2+2)}{(x^2+2)^2}+ \frac{Bx+C}{(x^2+2)^2}

= \frac{Ax^2+2A+Bx+C}{(x^2+2)^2}

Numerator is a quadratic polynomial, while the expression has the numerator as a cubic .

Therefore, both the expressions are not equivalent.

Option B

\frac{A}{(x^2+2)^2}+ \frac{Bx+C}{(x^2+2)^2}

= \frac{A+Bx+C}{(x^2+2)^2}

Here, numerator of the expression is a linear polynomial which is not equal to given expression.

Therefore, both the expressions are not equivalent.

Option C

\frac{Ax+B}{(x^2+2)}+ \frac{Cx+D}{(x^2+2)^2}

= \frac{(Ax+B)(x^2+2)}{(x^2+2)^2}+ \frac{Cx+D}{(x^2+2)^2}

= \frac{Ax^3+Bx^2+2Ax+2B+Cx+D}{(x^2+2)^2}

= \frac{Ax^3+Bx^2+x(2A+C)+D}{(x^2+2)^2}

Here, numerator is a cubic polynomial.

Therefore, both the expressions are equivalent.

Option D

\frac{Ax+B}{(x^2+2)^2}+ \frac{Cx+D}{(x^2+2)^2}

= \frac{x(A+C)+(B+D)}{(x^2+2)^2}

Numerator is a linear polynomial.

Therefore, sum is not equal to the given expression.

Option C will be the answer.

3 0
3 years ago
Help my please with math
frosja888 [35]
8x + 7y = -15 (1st)
-7x - 9y = -7 (2nd)

multiply (1st) by 7 and (2nd) by 8

56x + 49y = -105 (multiply 7)
-56x - 72y = -56 (multiply  8)
--------------------------------------------add
         -23y = -161
               y = 7

8x + 7y = -15
8x + 7(7) = -15
8x + 49 = -15
8x = -64
x = -8

answer
x = -8 and y = 7
4 0
3 years ago
I need help please?!):
motikmotik

Answer:

Option C:   $ \sqrt{\textbf{121}} $

Step-by-step explanation:

Given the side length of a square is 11 units.

Note that $ \sqrt{121} = \pm 11 $

Since, length cannot be negative, we can eliminate - 11.

Hence, the length of the side of the square is 11 units = $ \sqrt{11^2} = \sqrt{121} $.

Hence, the answer.

7 0
3 years ago
The dependent variable, y is 7 more than 1/2 the independent variable, x.
san4es73 [151]
Y=(x/2)+7 as an equation if that is what you are asking
8 0
3 years ago
Dave and Sandy Hartranft are frequent flyers with a particular airline. They often fly from City A to City​ B, a distance of 816
d1i1m1o1n [39]

999999999999999999999999999999 thats how fast jk idk

Step-by-step explanation:

7 0
3 years ago
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