3 years ago

How are basic facts can help you find 102030*40 mentally

1 answer:

5 0

When you do the multiplication you can notice that 10, 20, 30, 40 all have 0's at the end.

So that means 10 *20*30*40 = 1*2*3*4*10000 = 24*10000 = 240,000

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Excellent! Move on to the 7th (or 8th if you count 0) Fibonacci number.

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Answer:

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Step-by-step explanation:

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4 years ago

May somebody help me with this please?

beks73 [17]

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3 years ago

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Does anyone know how to do this?

sineoko [7]

Answer:

$\boxed{\tt x=\sqrt{85} }$

Step-by-step explanation:

When making a right triangle with 2 points, the distance is the hypotenuse which can be represent as "x"

To find the distance we can use the Pythagorean theorem.

$\boxed{{\tt a^2+b^2=c^2}}$

→ $\tt a=9$

→ $\tt b=2$

→ $\tt c=x$

Let's Plug in the side lengths:

$\tt 9^2+2^2=x^2$

Evaluate 9²= 81 and 2²= 4:

$\tt 81+4=x^2$

Now, add 81+4= 85

$\tt 85=x^2$

Take the square root of both sides:

$\tt x=\sqrt{85}$

_____________________________

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3 years ago

(07.01 MC)

OverLord2011 [107]

Answer: 12/5

Step-by-step explanation:

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The difference between three times a number and 15 is equal to 6. Find the number

andreyandreev [35.5K]

15+6=21
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answer
3×7-15=6

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4 years ago

How are basic facts can help you find 10*20*30*40 mentally

How are basic facts can help you find 102030*40 mentally