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Sophie [7]
3 years ago
6

Someone please help im dumb =)

Mathematics
1 answer:
Sveta_85 [38]3 years ago
3 0

Answer:

4: 5 - 3x <u>></u> 11

1: 2x + 1 <u><</u> 3

2: 5x + 7 <u>></u> 17

3: 1 + 3x <u>></u> -5

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I need help with this is it yes or no?
n200080 [17]

Answer:

No.

Step-by-step explanation:

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If using the method of completing the square to solve the quadratic equation x^2+13x+15=0 which number would have to be added to
Ray Of Light [21]

Answer:

The number to be added to complete the square is (13/2)^2

But the solved value for x are:

x = 11.71 or -1.28

Step-by-step explanation:

x ^ 2 + 13x + 15 = 0

x^2 + 13x = -15

(The coefficient of x^2 is 1, hence needless diving through)

Add the square of half the coefficient of x to both sides

x^2 + 13x + (13/2)^2 = -15 + ( 13/2)^2

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(x + 13/2)^2 = 109/4

Take the square of both sides

x + 13/2 = +-10.44/ 2

x = 10.44/2 + 13 /2

x = 23.44/2

x = 11.71

OR

x = 10.44/2 - 13/2

x = -2.56/2

x = -1.28

Therefore x = 11.71 or -1.28

But the number to be added to complete the square is (13/2)^2

Lets keep learning, maths is fun

8 0
3 years ago
7.25 units x 5 units x 3 units​
Mashutka [201]

Answer:

108.75 units please give brainliest

Step-by-step explanation:

its literally just multiplying 7.25 units x 5 units x 3 units​

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8 0
3 years ago
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