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crimeas [40]
3 years ago
9

How to multiply this (7 + i)(6 − 7i) ?

Mathematics
2 answers:
Anuta_ua [19.1K]3 years ago
7 0

FOIL

7(6)+7(-7i)+6(i)+i(-7i)

42-49i+6i-7i^2

7i^2-43i+42

nikdorinn [45]3 years ago
4 0

What you need to do is first multiplying by using the Foil method. <u>The foil method is multiplying the terms which occur last in each binomial</u>

Than you combine the real imaginary parts of the expression. so the Answer is

49 - 43i Hope this helps :)

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A team of psychologists studied the effect of multitasking on the completion of cognitive tasks. A group of 40 women participate
kakasveta [241]

Answer: Matched-pairs t-test

Step-by-step explanation:

5 0
3 years ago
Carrie buys 4.16 pounds of apples for 5.20 how much does 1 pound cost
JulijaS [17]
4.16 / 5.20 = 1 / x.....4.16 lbs to $ 5.20 = 1 lb to $x
cross multiply because this is a proportion
(4.16)(x) = (5.20)(1)
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7 0
3 years ago
P is a rectangle with a length 40 cm and width x cm
TiliK225 [7]
The first thing we must do for this case is to look for the area of each rectangle.
 We have then:
 A1 = (40) * (x)
 A2 = (1.25 * 40) * (y)
 Then, we have the following relationship between areas:
 "the area of Q is 10% less than the area of p"
 A2 = 0.9 * A1
 Substituting values we have:
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 We rewrite:
 50y = 36x
 The relationship x: y is:
 x / y = (50) / (36)
 Simplifying:
 x / y = (25) / (18)
 Answer:
 
the ratio of x:y is:
 
25:18
3 0
3 years ago
Twelve less than a p <br> number is two
Ipatiy [6.2K]

Answer:

P = 14

Step-by-step explanation:

First of all we know that P - 12 = 2

So, basically all we have to do is add 12 plus 2.

12 + 2 = P

P = 14

So, P should equal 14.

3 0
3 years ago
Read 2 more answers
Will give brainliest for correct answer
ioda

Answer:

Step-by-step explanation:

1. Not a function

2. Not a Function

3. Function

6 0
3 years ago
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