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3 years ago

25 tests in all 23 Are perfect tests what percent are perfect

Mathematics

2 answers:

zloy xaker [14]3 years ago

8 0

Answer:92%

Step-by-step explanation:

madreJ [45]3 years ago

5 0

92% is the amount that are perfect

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If the diagonal of a square is approximately 12.73, what is the length of its sides?

Alja [10]

Answer:

The length of the sides of the square is 9.0015

Step-by-step explanation:

Given

The diagonal of a square = 12.73

Required

The length of its side

Let the length and the diagonal of the square be represented by L and D, respectively.

So that

D = 12.73

The relationship between the diagonal and the length of a square is given by the Pythagoras theorem as follows:

$D^{2} = L^{2} + L^{2}$

Solving further, we have

$D^{2} = 2L^{2}$

Divide both sides by 2

$\frac{D^{2}}{2} = \frac{2L^{2}}{2}$

$\frac{D^{2}}{2} = L^2$

Take Square root of both sides

$\sqrt{\frac{D^{2}}{2}} = \sqrt{L^2}$

$\sqrt{\frac{D^{2}}{2}} = L$

Reorder

$L = \sqrt{\frac{D^{2}}{2}}$

Now, the value of L can be calculated by substituting 12.73 for D

$L = \sqrt{\frac{12.73^{2}}{2}}$

$L = \sqrt{\frac{162.0529}{2}}$

$L = \sqrt{{81.02645}$

$L = 9.001469325$

$L = 9.0015$ (Approximated)

Hence, the length of the sides of the square is approximately 9.0015

7 0

3 years ago

Please help the question is attatched

raketka [301]

Answer:

Step-by-step explanation:

It’s C

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3 years ago

Hi! Can you help me? Don’t forget about the work. Thank you so much.

Elan Coil [88]

See the attached picture:

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3 years ago

What is the first step in the indirect proof?

FromTheMoon [43]

A) If you have 12 dogs and cats (I assume 12 in total) and divide those by two, you get six dogs and six cats. It has to be more dogs than cats, and the sum of those two has to be twelve. So to reach the sum 12, while one number is bigger that the other, the number has to be 7 or more.

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3 years ago

Insert parentheses in the expression 6 + 10 x 2 so that the expression equals (12+1)*2

Lesechka [4]

6 + (10 x 2) = 26 = (12+1)*2

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3 years ago