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lozanna [386]
3 years ago
6

Simplify the following and express in the form a+bi. (-8-i)(-8+i)

Mathematics
1 answer:
sesenic [268]3 years ago
8 0
 (-8-i)(-8+i)
=65
 (-8-i)(-8+i) is already in a+bi form of a complex number.
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Can someone help me please?
Elena-2011 [213]
<h3>Answer:  4368 square feet</h3>

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

Explanation:

Check out the diagram below

I drew a rectangle with dimensions 56 ft by 78 ft.

Then I broke up the 56 into 50+6, and I broke up the 78 into 70+8

The reason for this is because it's fairly easy to multiply the areas of each smaller rectangle at this point

  • In the upper left corner, we have an area of 50*70 = 3500. Note how this is basically 5*7 = 35, but we tack on the two zeros (from 50 and 70 combined)
  • In the upper right corner, we have an area of 70*6 = 420
  • In the lower left corner, we have an area of 50*8 = 400
  • In the lower right corner, we have an area of 6*8 = 48

Add up all the areas found: 3500+420+400+48 = 4368

As a way to check, using your calculator shows that 56*78 = 4368

8 0
3 years ago
PLS , help me asap :(( , im so frustrated , idk how to do these :c
kolezko [41]

Answer:

y intercept = 5

Step-by-step explanation:

In analytic geometry, using the common convention that the horizontal axis represents a variable x and the vertical axis represents a variable y, a y-intercept or vertical intercept is a point where the graph of a function or relation intersects the y-axis of the coordinate system. As such, these points satisfy x = 0.

6 0
3 years ago
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Plz plz plz help❤I'll help back
Rama09 [41]
The answer is forty four 44

3 0
3 years ago
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How is the distributive property used to expand expressions? provide an example
Pepsi [2]
Yes the distributive property is used to expand expressions, but it is also used to make it simpler.
For an example

3(x+4) + 3(y-8)
This is the same thing as
3x + 12 + 3y -8
8 0
3 years ago
Rita bought 6 boxes of chocolates. Each box cost $6.48. How much did she spend?
Elena L [17]

Answer:

38.88

Step-by-step explanation:

Take the price per box and multiply by the number of boxes

6.48*6 =38.88

3 0
3 years ago
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