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3 years ago

Which of the following options have the same value as 20% of 45 (choose 3 answer)

Mathematics

1 answer:

11Alexandr11 [23.1K]3 years ago

3 0

Answer:

20% of 45 is 9,

Step-by-step explanation:

So the answer must be 9 for an example 50% of 18 is 9 because to find 50% of something simply divide by 2 .10% of 90 is 9 because to find 10% of something divide by 10. 25% of 36 is 9 because you divide by 4 to get 25% of anything.

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Evaluate the expression 3a - 2ab if a= 4 and b= 6<br><br><br> please explain, thank you !

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cluponka [151]

Answer:

27.5 inches^2

Step-by-step explanation:

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3 years ago

19. Which equation is in standard form and represents a line with slope 5 through the point (0, 2)?

alisha [4.7K]

Answer:

y= 5x+2

Explanation:

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4 0

3 years ago

PLEASE AND THANK YOU CONFUSED ON THIS

ICE Princess25 [194]

After staring at this for a few seconds, I think the equation

$-5\sqrt{10}\cdot\sqrt{15}=[1]\sqrt{[2]}$

is asking you to simplify the left hand side so that it has a form matching the right hand side, and [1] and [2] are placeholders. My guess is that they're supposed to be integers.

Notice that

$\sqrt{10}=\sqrt{5\cdot2}=\sqrt5\cdot\sqrt2$

$\sqrt{15}=\sqrt{5\cdot3}=\sqrt5\cdot\sqrt3$

$\implies\sqrt{10}\cdot\sqrt{15}=(\sqrt5)^2\cdot\sqrt2\cdot\sqrt3=5\sqrt{2\cdot3}=5\sqrt6$

Then multiplying by -5, we have

$-5\sqrt{10}\cdot\sqrt{15}=-25\sqrt6$

so I believe [1] = -25, and [2] = 6.

5 0

3 years ago