All categories

3 years ago

Confused, and there's a test tomorrow.

Mathematics

1 answer:

-BARSIC- [3]3 years ago

5 0

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

You might be interested in

Easy Points if you know math. Please help, question attached in picture.

blagie [28]

Answer:

y = 1/2x +6

Step-by-step explanation:

We have a point and a slope. Therefore we can use the point slope form to create a line

y-y1 = m(x-x1)

y-5 = 1/2(x--2)

y-5 = 1/2(x+2)

Distribute the 1/2

y-5 = 1/2x +1

Add 5 to each side

y-5+5 = 1/2x +1+5

y = 1/2x +6

This is in slope intercept form

6 0

3 years ago

You are visiting a friend in Coshocton and need to get to Cedar Point in Sandusky. These two cities are 106 miles apart. Using t

Paraphin [41]

Answer:

Step-by-step explanation:

Set-up a proportion with equal ratios.

$\frac{3}{50}=\frac{x}{106}$

Solve for x by cross multiplying.

3*106 = 50*x

318 = 50x

6.36 = x

6 0

3 years ago

A bag contains 5 red marbles, 7 blue marbles and 4 green marbles if two marbles are drawn out of the bag what is the probability

Ann [662]

Answer:

0.083 probability that both are red

Step-by-step explanation:

total marbles = 5 + 7 + 4 = 16

Two marbles drawn out.

Find P(red, and red) = (5/16) * (4/15) = 1/(3*4) = 1/12 = 0.08333

8 0

3 years ago

The outdoor temperature, in degrees Fahrenheit, is recorded at noon for ten consecutive school days. The measurements were as fo

just olya [345]

Answer:

25.38,34,28,23,

Step-by-step explanation:

also I am going to have a meeting tomorrow night

7 0

3 years ago

2x-1=5-6x<br> will give brainliest!!!<br> no links, 20 points.

andrew-mc [135]

Answer:

x = 3/4

Step-by-step explanation:

1. Rearrange terms

2x - 1 = 5 - 6x

2x - 1 = -6x + 5

2. Add 1 to both sides of the equation. We want to get rid of -1.

2x -1 = -6x + 5

+1 +1

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

2x = -6x + 6

3. Simplify.

2x + 6x = 6

8x = 6

6/8 = 3/4

Then, the answer is 3/4.

Hope this helps.

7 0

3 years ago