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3 years ago

Please Help me. I get so confused doing these questions.

Mathematics

1 answer:

ArbitrLikvidat [17]3 years ago

3 0

Answer:

It should be -24

Step-by-step explanation:

I found it online, since I wasn't entirely sure, but remember that studying can be fun, and everyone have an amazing day :)

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If neither a nor b are equal to zero, which answer most accurately describes the product of (a + bi)(a - bi)?

Scrat [10]

Answer: the correct option is

(D) The imaginary part is zero.

Step-by-step explanation: Given that neither a nor b are equal to zero.

We are to select the correct statement that accurately describes the following product :

$P=(a+bi)(a-bi)~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)$

We will be using the following formula :

$(x+y)(x-y)=x^2-y^2.$

From product (i), we get

$P\\\\=(a+bi)(a-bi)\\\\=a^2-(bi)^2\\\\=a^2-b^2i^2\\\\=a^2-b^2\times (-1)~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~[\textup{since }i^2=-1]\\\\=a^2+b^2.$

So, there is no imaginary part in the given product.

Thus, the correct option is

(D) The imaginary part is zero.

3 0

3 years ago

What is greater and what is least 6.00 0.56 0.060 0.60 0.056 0.557781 0.059999

tangare [24]

Answer:

6.00, 0.56,0.557781,0.059999, 0.056

Step-by-step explanation:

Look at the place values

4 0

3 years ago

You will drive 200 miles and need to calculate your gas expense (25km per gallon and gas costs $6.00/gallon).

makvit [3.9K]

First you do 200 miles divided by 25 km. It is 8. This means you need 8 gallons for the whole trip. 8 times 6dollars is 48 dollars. You will need to pay 48 dollars in gas prices.

7 0

3 years ago

The formula d = 16t gives the distance d, in feet, that an object has fallen t seconds after it is

il63 [147K]

It should be B. 64 feet:)

5 0

3 years ago

HELP ITS URGENTTTTTTTT

Anna [14]

Answer:

$\frac{1}{11}$

Step-by-step explanation:

$\frac{3}{12}\cdot \frac{4}{11}$ $=\frac{1}{11}$

Hope this helped! :)

7 0

3 years ago