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4 years ago

Ill mark brainlist!

Mathematics

1 answer:

inessss [21]4 years ago

8 0

Answer:

I think the first one

Step-by-step explanation:

Definitely not the second one because it would be addition.

Definitely not the third one either because that would be subtraction.

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Writing in math use counters.tell how to make 10 when adding 8 5

kaheart [24]

<span>How can you make 10 when adding 8 + 5?
Well, let’s try:
Adding 8 and 5 is equals to 13
=> 8+5=13 (How can you get 10)
Well 13 has 2 digits where 3 is placed in ones and 1 is place in tens. Therefore adding 8 and 5 will result to 10.

</span>

5 0

3 years ago

Read 2 more answers

Find the multiplicative inverse of 3 − 2i. Verify that your solution is corect by confirming that the product of

leonid [27]

Answer:

$\frac{3}{13} + \frac{2i}{13}$

Step-by-step explanation:

The multiplicative inverse of a complex number y is the complex number z such that (y)(z) = 1

So for this problem we need to find a number z such that

(3 - 2i) ( z ) = 1

If we take z = $\frac{1}{3-2i}$

We have that

$(3- 2i)\frac{1}{3-2i} = 1$ would be the multiplicative inverse of 3 - 2i

But remember that 2i = √-2 so we can rationalize the denominator of this complex number

$\frac{1}{3-2i } (\frac{3+2i}{3+2i } )=\frac{3+2i}{9-(4i^{2} )} =\frac{3+2i}{9-4(-1)} =\frac{3+2i}{13}$

Thus, the multiplicative inverse would be $\frac{3}{13} + \frac{2i}{13}$

The problem asks us to verify this by multiplying both numbers to see that the answer is 1:

Let's multiplicate this number by 3 - 2i to confirm:

$(3-2i)(\frac{3+2i}{13}) = \frac{9-4i^{2} }{13} =\frac{9-4(-1)}{13}= \frac{9+4}{13} = \frac{13}{13}= 1$

Thus, the number we found is indeed the multiplicative inverse of 3 - 2i

4 0

3 years ago

What is the interquartile range of this data?

harkovskaia [24]

The interquartile range is 24...

7 0

4 years ago

What decimal represents the portion of silver in sterling silver?

Aleks [24]

The answer is 92.5%.

5 0

4 years ago

What system of equations does not have the same solution

Effectus [21]

Answer:

2x + y = 4

4x + 2y = 12

Step-by-step explanation:

Equations 2x + y = 4 & 4x + 2y = 12 haven't the same solution.

$2x + y = 4...(1) \\ 4x + 2y = 12 \\ 2(2x + y) = 12 \\ 2x + y = \frac{12}{2} \\ 2x + y = 6...(2) \\ rhs \: of \: equations \: (1) \: and \: (2) \: are \: \\ not \: sme.$

3 0

4 years ago