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Mice21 [21]
4 years ago
15

How do i find the length of side AB?

Mathematics
1 answer:
Elis [28]4 years ago
5 0

Answer:

AB = 78

Step-by-step explanation:

Using Pythagoras' identity in the righr triangle.

The square on the hypotenuse is equal to the sum of the squares on the other 2 sides, that is

AB² = 72² + 30² = 5184 + 900 = 6084 ( take the square root of both sides )

AB = \sqrt{6084} = 78

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Kylie explained that (negative 4 x + 9) squared will result in a difference of squares because (negative 4 x + 9) squared = (neg
Eva8 [605]

Given:

The given expression is:

(-4x+9)^2

According to Kylie,

(-4x+9)^2=(-4x)^2+(9)^2

(-4x+9)^2=16x^2+81

To find:

The correct statement for Kylie's explanation.

Solution:

We have,

(-4x+9)^2

According to the perfect square trinomial (a+b)^2=a^2+2ab+b^2.

(-4x+9)^2=(-4x)^2+2(-4x)(9)+(9)^2

(-4x+9)^2=16x^2-72x+81

Kylie did not understand that this is a perfect square trinomial, and she did not determine the product correctly.

Therefore, the correct option is C.

4 0
3 years ago
Read 2 more answers
Can someone please help me out with this question
Art [367]

Answer:

C.

Step-by-step explanation:

7 0
3 years ago
Help idk I don’t understand please ASAP
Pachacha [2.7K]

Answer:

x = 200/3

Step-by-step explanation:

Apply Thales theorem, we have:

80/(2x) = 60/27

Let's simplify both sides:

40/x = 20/9

or

x/40 = 9/20

Multiplying both sides by 40, we have:

(40/40)x = (20/9)*40

Let's simplify one more time:

x = (20*40)/(9)

or

x = 200/3

Hope this helps!

8 0
3 years ago
Read 2 more answers
Write two expressions where the solution is 28
kvv77 [185]
16 + 12

Another one would be...

10 + 18
3 0
3 years ago
Answer and explain how long is the surface of the slide
erica [24]

Answer:

13.9 ft

Step-by-step explanation:

use Pythagoras theorem

surface²=7²+12²

surface²=193

surface=√193=13.89 ft≈13.9 ft

please mark brainliest

6 0
3 years ago
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