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goldenfox [79]
3 years ago
5

Johnson Construction Company is going to build a house on a concrete slab. The slab is to have dimensions 30 feet by 20 feet by

2 feet. How many cubic feet of concrete should the construction company order
Mathematics
1 answer:
soldi70 [24.7K]3 years ago
3 0

Answer:

1200ft^3

Step-by-step explanation:

30 x 20 x 2= 1200^3

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What is the completely factored form of x4 8x2 – 9?
Alinara [238K]

For this case we have the following polynomial:

x ^ 4 + 8x ^ 2 - 9

We make the following change of variables:

u = x ^ 2

Rewriting we have

u ^ 2 + 8u - 9

Factoring the second order polynomial we have:

(u + 9) (u-1)

Then, returning the change we have:

(x ^ 2 + 9) (x ^ 2-1)

Finally, we factor the expression in the parentheses of the second term:

(x ^ 2 + 9) (x + 1) (x-1)

Answer:

the completely factored form is:

(x ^ 2 + 9) (x + 1) (x-1)

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3 years ago
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Can somebody help me with this question please
harina [27]

Answer:

34

Step-by-step explanation:

Points B,C,D, and E are points on the edge of the circle.

\angle BCD and \angle BED are in the same segment.

We have that: \angle BCD=34\degree

We want find m\angle BED

Recall that angles in the same segment are congruent.

\therefore \angle BED=\angle BCD=34

So the answer is 34

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3 years ago
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Crank

Answer:

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Bella pays 7 payments of $5 each to a game store.she returns one game receives $20 back.what is the change of the about of money
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How can sums and differences of cubes be identified for factoring?
Ad libitum [116K]
The sum of cubes is given as:
a³ + b³ = (a + b)(a² - ab + b²)

Example for the sum of cubes:

64x³+y³ ⇒ This is the sum of cubes because each term; 64, x³, and y³ are cube numbers

By writing each term as an expression of cube numbers, we have:
(4x)³ + (y)³ ⇒ 64 is 4³
Use the factorization of the sum of cubes, we have:
(4x + y) ( (4x)²- 4xy + y²)
(4x + y) (16x² - 4xy + y²)

--------------------------------------------------------------------------------------------------------------

The difference of cubes can be factorized as:
(x³ - y³) = (x - y)(x² + xy + y²)

Example
(125x³ - 8y³) = (5x - 2y) ((5x)² + (5x)(2y) + (2y)²)
                     = (5x - 2y) (25x² + 10xy + 4y²)
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