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3 years ago

The four-digit number 56A2 is divisible by 9. What digit does A represent?

Mathematics

2 answers:

fgiga [73]3 years ago

8 0

A=5

5652/9= 628

Any other number results in a decimal.

aliya0001 [1]3 years ago

7 0

Answer:

A=5

Step-by-step explanation:

We can use 9's divisibility rule

Which is if we add all the numbers up, it should be divisible by 9.

So,

5+6+2=13

13 is closest to 18

So,

18-13

Therefore, A=5.

Hope this helps!! :)

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4 years ago

Jennifer is driving her boat West at a speed of 12 mph. The current is moving due South at 5 mph.

butalik [34]

Speed is the rate of distance over time.

The speed of the boat is 13mph south-west

Given

$v_1 = 12mph$ --- west

$v_2 = 5mph$ -- south

The speed is illustrated with the attached image

Because both speeds act at a diagonal, the speed (v) of the boat is calculated using Pythagoras theorem as follows:

$v^2 = 12^2 + 5^2$

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Take square root

$v = \sqrt{169$

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Hence, the speed of the boat is 13mph south-west