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Yakvenalex [24]
3 years ago
11

Multiply: (-4 + i)(-1 + 5i)

Mathematics
1 answer:
Olegator [25]3 years ago
3 0

Answer:

( - 4 + i) ( - 1 + 5i) \\  = 4 - 20i - 1i + 5 {i}^{2}  \\  = 4 - ( -21i )+ 5i {}^{2}

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Kim and Melody are selling popcorn buckets for a school fundraiser. Customers can buy small buckets or large buckets. Kim sold 3
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Answer:

The cost of

A small bucket = x = $8

A Larger bucket = y = $13

Step-by-step explanation:

Let the cost of

A small bucket = x

A Larger bucket = y

Kim sold 3 small buckets and 14 large buckets of popcorn for a total of $206.

3x + 14y = 206... Equation 1

Melody sold 11 small buckets and 11 large buckets of popcorn for a total of $231.

11x + 11y = 231.... Equation 2

What is the cost for a small bucket and a large bucket of popcorn?

3x + 14y = 206... Equation 1

11x + 11y = 231 ....... Equation 2

We solve using Elimination method

Multiply Equation 1 by 11 and Equation 2 by 3 to Eliminate x

33x + 154y = 2266.... Equation 3

33x + 33y = 693....... Equation 4

We subtract Equation 4 from Equation 3

121y = 1573

y = 1573/121

y = $13

Solving for x

3x + 14y = 206... Equation 1

3x + 14 × 13 = 206

3x + 182 = 206

3x = 206 - 182

3x = 24

x = 24/3

x = $8

Hence, the cost of

A small bucket = x = $8

A Larger bucket = y = $13

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3 years ago
On a manufacturer's assembly line, 3% of its merchandise comes off defective. If the company has 354 defective items, how many t
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Read 2 more answers
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Answer:

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Answer:

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2 years ago
There are 7 coins that look identical.One of the seven coins weighs slightly less than the other 6. Using a balance scale, how c
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Start by putting two coins on each side of the scale. If one side is higher, then the light coin must be in that pair (use a second weighing to determine which of that pair is the lightest.)
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