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yaroslaw [1]
3 years ago
6

How is multiplying two decimals different from multiplying a whole number and a decimal

Mathematics
2 answers:
prisoha [69]3 years ago
6 0

Answer:

So multiplying decimal and whole number means it will always equal as a decimal. But multiplying decimal with decimal means could equal whole or decimal number

Step-by-step explanation:

Verdich [7]3 years ago
6 0

Answer:

Essentially, they are same thing

Step-by-step explanation:

For example, 3 x 0.4 = 1.2

0.3 x 0.4 = 0.12

The only thing that changes are the amount of numbers behind the decimal. So when multiplying decimals, you just multiply like normal (3 x 4 = 12), then you count the amount of decimal spaces (two) and you take the number (12) and move the decimal place to the left twice. 12.0 would go to 1.2 if multiplying by a tenth.

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What does i^739 equal? explain how you found your answer.
Sophie [7]
<h3>Answer:   -i</h3>

========================================================

Explanation:

i = sqrt(-1)

Lets list out the first few powers of i

  • i^0 = 1
  • i^1 = i
  • i^2 = -1
  • i^3 = i*i^2 = i*(-1) = -i
  • i^4 = (i^2)^2 = (-1)^2 = 1

By the time we reach the fourth power, we repeat the cycle over again (since i^0 is also equal to 1). The cycle is of length 4, which means we'll divide the exponent over 4 to find the remainder. Ignore the quotient. That remainder will determine if we go for i^0, i^1, i^2 or i^3.

For example, i^5 = i^1 because 5/4 leads to a remainder 1.

Another example: i^6 = i^2 since 6/4 = 1 remainder 2

Again, we only care about the remainder to find out which bin we land on.

-------------

Turning to the question your teacher gave you, we have,

739/4 = 184 remainder 3

So i^739 = i^3 = -i

<h3>-i is the final answer</h3>

--------------

Side notes:

  • if i^a = i^b, then a-b is a multiple of 4
  • Recall that the divisibility by 4 trick involves looking at the last two digits of the number. So i^739 is identical to i^39.
4 0
3 years ago
If a=1/x+1/y, what is the value of 1/a
Leya [2.2K]

Answer:

 1/a = xy/(y-x)

Step-by-step explanation:

Simplify the reciprocal:

 1/a = 1/(1/x -1/y) = 1/((y-x)/(xy))

 1/a = xy/(y-x)

8 0
3 years ago
Help me on this and ill mark you brainliest
Sophie [7]

Answer:

Y = x - 3

Step-by-step explanation:

y = x - 3

if x = 0 , y = -3

if x = 3 , y = 0

if x = 5 , y = 2

7 0
3 years ago
Name three solutions of x &gt; 10.5
Svetllana [295]
In the problem is says that d is greater than 10.5 so any value greater than 10.5 is the answer

X = 11
X= 12
X= 14.
5 0
3 years ago
Twenty-five percent of 66 is ______
viva [34]
66 x .25 = 16.5  Have a great day.
7 0
3 years ago
Read 2 more answers
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