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luda_lava [24]
3 years ago
6

Can someone help me with this? No links please

Mathematics
2 answers:
Sphinxa [80]3 years ago
6 0

Answer:

3) (4x-9)(4x+9)

Step-by-step explanation:

Westkost [7]3 years ago
5 0

Answer:

(3) (4x - 9)(4x + 9)

Step-by-step explanation:

4x times 4x will give you 16x^2, and 9 times 9 is 81, but you need to have one of the nines negative to give you the -81.

You needed the square root of 16 and the square root of x^2, then the square root of 81.

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Convert 156% to a decimal
Fofino [41]

Answer:

1.56

Step-by-step explanation:

156 divided by 100

4 0
3 years ago
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A school is planning to construct two rectangular play areas in the playground. The length of play area A must be 1 foot longer
Anna11 [10]

Answer:

А.The system has two solutions, but only one is viable because the other results in a negative width.

Step-by-step explanation:

Given

Let:

L_A \to length of play area A

W_A \to width of play area A

L_B \to length of play area B

W_B \to width of play area B

x \to Area of A

y \to Area of B

From the question, we have the following:

L_A = 1 + 4W_A

W_B = 2 + W_A

L_B = 2 + 3W_B

x = y

The area of A is:

x = L_A * W_A

This gives:

x = (1 + 4W_A) * W_A

Open bracket

x = W_A + 4W_A^2

The area of B is:

y = L_B * W_B

y = (2 + 3W_B) * ( 2 + W_A)

Substitute: W_B = 2 + W_A

y = (2 + 3(2 + W_A)) * ( 2 + W_A)

Open brackets

y = (2 + 6 + 3W_A) * ( 2 + W_A)

y = (8 + 3W_A) * ( 2 + W_A)

Expand

y = 16 + 8W_A + 6W_A + 3W_A^2

y = 16 + 14W_A + 3W_A^2

We have that:

x = y

This gives:

W_A + 4W_A^2 = 16 + 14W_A + 3W_A^2

Collect like terms

4W_A^2 - 3W_A^2 + W_A  -14W_A  - 16 =0

W_A^2  -13W_A  - 16 =0

Using quadratic calculator, we have:

W_A = -14.1 or W = 1.13 --- approximated

But the width can not be negative; So:

W = 1.19

7 0
3 years ago
Triangle QRS is similar to triangle TUV.
Oksi-84 [34.3K]

Answer:

SQ/VT = QR/TU = SR/VU

hope it helps

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Ayo imma give away freee points checkk
prisoha [69]

Answer:

Thx man

Step-by-step explanation:

8 0
3 years ago
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When u round to the nearest hundred thousand the population of the state of North Carolina is 9,800,000. Which could be the exac
rjkz [21]

Answer:

D - 9,848,060

Step-by-step explanation:

In the number 9,848,060 the number 8 is in the hundred thousands place.

The number behind it is 4, which is nor equal to or more than 5, meaning that that the 8 stays the same.

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