Confused, and there's a test tomorrow. "Write (5+ 2yi) (4-3i)- (5-2yi) (4-31) in a a + bi form, where y is a real number"

Answers

Answer 1

Answer:

Answer:

12y +16yi

Step-by-step explanation:

The thing about complex numbers is that you can treat them as binomials and use all of the things you know about multiplying and factoring polynomials.

Here, we assume you have ...

(5 +2yi)(4 -3i) -(5 -2yi)(4 -3i)

The factor (4 -3i) can be factored out, so you have ...

= ((5 +2yi) -(5 -2yi))(4 -3i)

= (4yi)(4 -3i)

= 16yi -12yi²

At this point, the definition of i comes into play, and you replace i² with -1.

= 12y +16yi

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What is the area in square millimeters of a rectangle with a width of 8.7 centimeters, and a length of 9.3 centimeters? A. 80,910 mm2 B. 809.1 mm2 C. 8091 mm2 D. 80.91 mm2

Answers

9.3 cetineters equals 93 millileters and 8.7 centimwters equals 87 millileters. So 87 x 93 =8091.
Your answer is C

9.2 cm = 92 mm
8.7 cm = 87 mm

92 x 87 = 8004
Answer: 8004 mm

The answer is above :)
(btw sry of u spot a mistake)

Whats 600 divided by 4

Answers

The calculated division of the numbers 600 divided by 4 is 150

How to calculate the division of the numbers

From the question, we have the following parameters that can be used in our computation:

600 divided by 4

When represented as an equation, we have

600 divided by 4 = 600/4

Divide 600 by 4

So, we have the following result

600 divided by 4 = 150

Using the above as a guide, we have the following:

the result is 150

Answers

the answer is: quarter to 2

Every day, the Webster Pet Store uses 1/2 of a bag of dog food to feed the dogs. How manydays will 3 1/2 bags of dog food last?

Answers

Answer:

The answer is 7. My name is Tedds the Dog.

Answer:

7 bags of dog food

Step-by-step explanation:

This so because if you add 1/2 7 times then you will get 3 1/2

Darius buys a bottle of a chemical solution that contains 70%, percent alcohol. The bottle contains 500 milliliters of solution.

Answers

I'm assuming that you're asking how many milliliters of alcohol is in the solution. The answer would be 350 milliliters

Answer:350

Step-by-step explanation:What’s

Graph y = -4x2 - 2 and its inverse

Answers

The function and it's inverse are graphed in the attached diagram.

For y -intercept is $x=0$ . This implies

$y=-4(0)^2-2$

$y=0-2$

$y=-2$

For x-intercept, $y=0$ , This means that,

$0=-4x^2-2$

$-(1)/(2)=x^2$

The above equation tells us that, the above equation has no real roots. Hence the graph has no x-intercept.

Also the value $a=-4<0$ , tells us the graph is a maximum graph.

THE INVERSE OF y

$y=-4x^2-2$

Interchange x and y.

$x=-4y^2-2$

Make y the subject to obtain,

$y^(-1)=\pm (√(-x-2))/(2)$ .

for x<-2.

You can now find the intercepts, with some few points to graph the inverse.

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