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3 years ago

3+7=7+3 is an example of which property

Mathematics

1 answer:

-Dominant- [34]3 years ago

6 0

Commutative because your switching the order

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Cos90degrees cos30 degrees + sec-squared45degrees sin30degrees - cos270degrees sin180degrees

yawa3891 [41]

Step-by-step explanation:

$\cos 90 \cos 30 + \sec^2 45 \sin 30 - \cos 270 \sin 180$

But we know that

$\cos 90 = \cos 270 = \sin 180 = 0$

and

$\sin 30 = \dfrac{\sqrt{3}}{2} \:\:\text{and}\:\: \sec 45 = \sqrt{2}$

so this leaves us with just

$\sec^2 45 \sin 30 = (\sqrt{2})^2 \left(\dfrac{\sqrt{3}}{2} \right)= \sqrt{3}$

6 0

3 years ago

Now, think about multiplying-25×-35.

Aliun [14]

Answer:

Positive

Step-by-step explanation:

If you multiply both negative, it will always result to positive.

Rule:

+ × + = +

+ × - = -

- × + = -

- × - = +

5 0

3 years ago

#9 Can anyone please help me, this is Pythagoras Theorem Converse.

77julia77 [94]

Answer:

Step-by-step explanation:

$A_{b}$ = A + $A_{s}$

(A). 12 + 16 > 20

(B). 10 + 18 < 30

(C). 4 + 5 < 12

<em>(D). 8 + 16 = 24</em>

3 0

2 years ago

A restaurant would like to evaluate the efficiency of its workers, so they observe the workers during the second shift.

Ksivusya [100]

Answer:

1.) It is biased

2.) No

3.) Yes

4.) No

Step-by-step explanation:

1.) It is biased as it is predisposition to one particular outcome over another.

2.) No, because biased in research leads to unrepresentative outcomes as the estimates is predisposed to the left or to the right of the true values.

3.) Yes. Since the selection of shift has an equal probability of being chosen.

4.) No. The probability that the sample accurately reflects the efficiency of the workers, the standard should be 95%.

4 0

3 years ago

6* 103 * 3* 102

djverab [1.8K]

Answer:

189108

Step-by-step explanation:

6*103*3*102=189108

8 0

2 years ago