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Natasha_Volkova [10]
3 years ago
7

What is the standard form of (7-5i)(2+3i)? A.-29+11i B.29+11i C. 11-29i D.-11+29i

Mathematics
2 answers:
pentagon [3]3 years ago
7 0

Answer:

B) 29 + 11i.

Step-by-step explanation:

Given : (7-5i)(2+3i).

To find : What is the standard form .

Solution : We have given  (7-5i)(2+3i).

Distributes 7 over (2+3i) and 5i over (2+3i).

7 (2+3i) - 5i (2+3i).

14 + 21i - 10 i - 15 i².

Combine like terms.

i² = -1.

14 + 21i -10i - 15(-1).

14 + 11i + 15.

14 + 15 + 11 i.

29 + 11i.

Therefore, B) 29 + 11i.

Lubov Fominskaja [6]3 years ago
5 0
It might be the last one but I don't know
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Evaluate 24. 5 PLS AND THANK YOU!!!
GREYUIT [131]

Answer:

80

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

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Step-by-step explanation:

<u>Step 1: Define</u>

2⁴ · 5

<u>Step 2: Evaluate</u>

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4 0
3 years ago
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5 0
1 year ago
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Triangle ABC is represented by the drawing below.
zhannawk [14.2K]

Step-by-step explanation:

Therefore,

(x+20) + (x-10) + (2x-30) = 180° (Sum of interior angles of a triangle)

Or, x+x+2x+20-10-30 = 180°

Or, 4x-20 = 180°

Or, 4x= 180+20

Or, 4x= 200°

Or, x= 200°/4

Therefore, x= 50°

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3 0
4 years ago
There are nine men and ten women in a club; in how many ways can a committee of four be formed?
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Combinations: \frac{n!}{r!(n-r)!}
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19 P 4 is 93024
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