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White raven [17]
3 years ago
11

Plzzzzz help me with this

Mathematics
2 answers:
ehidna [41]3 years ago
4 0

Answer:

We conclude that we must add 4² or 16 to complete the square.

Hence, option C i.e. 16 is the correct answer.

Step-by-step explanation:

We know that the perfect square formula is

<em>(a + b)² = a² + b² + 2ab</em>

Given the equation

x^2+8x

Let us add 4² or 16 in the equation

x^2+8x+4^2

x^2+\:2\left(1\right)\left(4\right)x+4^2

as <em>(a + b)² = a² + b² + 2ab, </em>so

<em />x^2+8x+4^2=\left(x+4\right)^2<em />

<em />

Therefore, we conclude that we must add 4² or 16 to complete the square.

Hence, option C i.e. 16 is the correct answer.

Bess [88]3 years ago
4 0

Answer:

3. <u>16</u> must be added to the equation (x²+8x) to complete the square.

Step-by-step explanation:

{x}^{2}  + 8x + 16 \\  {x}^{2}  + 2 \times 4 \times x +  {4}^{2}\\\boxed{{(x + 4)}^{2} }

Now, it is in the form of complete square :

→ x²+y²+2xy=(x+y)²

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sashaice [31]
The answer to the question is 14

x^4 + 14x^2 + 49


(x^2 + 7)^2

perfect square
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3 years ago
A die is rolled 20 times. given that three of the rolls came up 1, five came up 2, four came up 3, two came up 4, three came up
Serjik [45]

Solution:

Number of times a die is rolled = 20

1 - 3=A

2 - 5=B

3 - 4=C

4 - 2=D

5 - 3=E

6 -  3=F

Total number of arrangements of outcomes , when a dice is rolled 20 times given that 1 appear 3 times, 2 appears 5 times, 3 appear 4 times, 4 appear 2 times , 5 appear three times, and 6 appear 3 times

            = Arrangement of 6 numbers (A,B,C,D,E,F) in 6! ways and then arranging outcomes

= 6! × [ 3! × 5! × 4!×2!×3!×3!]

= 720 × 6×120×24×72→→[Keep in Mind →n!= n (n-1)(n-2)(n-3)........1]

= 895795200  Ways

8 0
3 years ago
1) Three bags of candies cost $5.75. Find the cost per bag.
FrozenT [24]

Answer:

$1.92

Step-by-step explanation:

To find the cost per bag we divide the total cost by the amount of bags so:

$5.75 / 3 = $1.91666667 per bag, which we can round up to $1.92 per bag.

7 0
3 years ago
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A rectangular garden has a length that is modeled by the expression 2 x – 7 and a width of 3 x 2 + 4 x. Part A: What is the area
borishaifa [10]
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                  8x-42

Perimeter: 2(2x - 7) + 2(3*2 + 4x)
5 0
3 years ago
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Please help me !!!!!!!!!!!!
Law Incorporation [45]
∠A+∠B=∠ACD
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8 0
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