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2 years ago

1.What is a tautology?

2 answers:

8 0

The saying of the same thing twice in different words, generally considered to be a fault of style (e.g., they arrived one after the other in succession ).

earnstyle [38]2 years ago

5 0

Answer:

the saying of the same thing twice in different words, generally considered to be a fault of style (e.g., they arrived one after the other in succession ).

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The lines below are perpendicular. If the green line has a slope of 1/7, what is

Lina20 [59]

Answer:

-7

Step-by-step explanation:

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2 years ago

Here is a centimetre square grid. Draw a shape with an area of 11cm squared.

aksik [14]

Answer in photo

NOTE: I'm not sure the answer may not be true

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2 years ago

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A distribution has the five-number summary shown below. What is the range of this distribution? 21, 32, 49, 67, 75

777dan777 [17]

The answer is 54. You subtract the highest value from the least value.

7 0

3 years ago

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In circle O, what is m∠MAJ? °

mr_godi [17]

See the attached figure.

m ∠KAJ = 170° & m ∠LAM = 80°

We should know that :

m ∠KAJ + m ∠LAM + m ∠KAL + m ∠MAJ = 360°

∴ m ∠KAL + m ∠MAJ = 360° - (m ∠KAJ + m ∠LAM)

∴ m ∠KAL + m ∠MAJ = 360° - (170°+80°) = 360° - 250° = 110°

But : m ∠KAL = m ∠MAJ ⇒⇒⇒ Opposite angles.

∴ m ∠MAJ + m ∠MAJ = 110°

∴ 2 * m ∠MAJ = 110°

∴ m ∠MAJ = 110° ÷ 2 = 55°

So, the answer is : m ∠MAJ = 55°

4 0

2 years ago

Of 560 marbles in a bag, 65% are red and the rest are blue. After 28 red marbles are replaced with blue ones, how many blue marb

jonny [76]

Answer: The answer is 400 blue marbles.

Step-by-step explanation: Given that there are 560 marbles in a bag, out of which 65% are red and rest are blue.

So, number of red marbles is

$n_r=65\%\times 560=\dfrac{65}{100}\times 560=364,$

and number of blue marbles is

$n_b=560-364=196.$

Now, if 28 red marbles are replaced by blue marbles, the the new number of red and blue marbles will be

$n_r^\prime=364-28=336~~~\textup{and}~~~n_b^\prime=196+28=224.$

Now, to get 65% of the marbles blue, we need to add some more blue marbles to the bag. Let 'x' number of blue marbles are added to the bag, then

$65\%\times (560+x)=224+x\\\\\Rightarrow \dfrac{65}{100}\times (560+x)=224+x\\\\\Rightarrow 13(560+x)=20(224+x)\\\\\Rightarrow 7280+13x=4480+20x\\\\\Rightarrow 7x=2800\\\\\Rightarrow x=400.$

Thus, 400 blue marbles need to be added to the bag.

5 0

3 years ago

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