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stepladder [879]
3 years ago
5

PLZ HELP ILL GIVE BRAINLIEST

Mathematics
1 answer:
Vlad1618 [11]3 years ago
5 0

Answer:

-1 -9i, where a = -1 and b = -9

Step-by-step explanation:

1st step is to open up the brackets. Since there's a (-) in front of the second bracket, we have to multiply every term by -1, so positive becomes negative, negative becomes positive etc.

4-i-5-8i

Then we collect like terms.

-1 -9i

This is the answer. It looks wrong since the variables are 'positive' in a +bi, but you have to remember that a variable can be represented as a, but its actual value could be negative, in this case -1. This is the same with b, as b could be the same as -9.

This is an expression, so we can't multiply everything by -1 to make it 'look right'. You can only multiply by -1 or 'alter' the terms when the expression equates to something.

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Angles A and B are complementary. Angle A has a measure of 2X - 8. Angle B
harkovskaia [24]

Answer:

Step-by-step explanation:

180 = 2x-8 + 36

152 = 2x

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6 0
3 years ago
A puzzle in the form of a quadrilateral is inscribed in a circle. The vertices of the quadrilateral divide the circle into four
e-lub [12.9K]

Answer:

Therefore,

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∠B = 60°

∠C = 150°

∠D = 120°

Step-by-step explanation:

Given:

A puzzle in the form of a quadrilateral is inscribed in a circle.

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Let the common multiple be "x" then the angles will be

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To Find:

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Solution:

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∠A = 30°

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∠C = 5 × 30 = 150°

∠D = 4 × 30 = 120°

Therefore,

∠A = 30°

∠B = 60°

∠C = 150°

∠D = 120°

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