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Julli [10]
3 years ago
13

Write an equivalent expression for each of the following. Express your answers in the form a + bi or a - bi

Mathematics
1 answer:
Lana71 [14]3 years ago
6 0

Answer:

44 +14i

Step-by-step explanation:

(5 + i)(9 + i)

FOIL

first 5*9 = 45

inner: 9i

outer :5i

last: i*i = i^2 = -1

Add togheter

45 + 9i+5i -1

Combine like terms

44 +14i

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A wave has frequency of 10 Hz and a speed of 30 m/s. What is the wavelength of the<br>wave?​
ladessa [460]

Answer:

3

Step-by-step explanation:

Wavelength is usually denoted as letter lambda (λ); it is equal to the speed (v) of a wave train in a medium divided by its frequency (f): λ = v/f. Waves of different wavelengths.

formula: λ = v/f

solution: λ= 30m/s / 10Hz

= 3

8 0
3 years ago
Eunice buys dog bed with a listed price of $31. Eunice uses a sale that provides 30% off. What is the total
Pachacha [2.7K]

Answer:

21.70

Step-by-step explanation:

First find the discount

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31 *.30

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3 years ago
Ms. Lou rolls out 2 3/5 ft. of dough. If she cuts the dough into sections that are 1/4 of a ft. each, how many sections of dough
Natasha_Volkova [10]

Answer:

10

Step-by-step explanation:

We need to divide 2 3/5 ft by 1/4 ft.

2 3/5 / 1/4 =

= 2 3/5 * 4

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= 52/5

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Answer: 10

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2 years ago
The big wheel could have a 52 inch diameter and the small wheel could have an 18 inch diameter, what is the circumference of the
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Step-by-step explanation:

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