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valkas [14]
2 years ago
7

Anyone know this? please help and Thank you very much!!!

Mathematics
1 answer:
Monica [59]2 years ago
7 0

(9+7i)(6+3i)\\\\=54+27i + 42i + 21i^2\\\\=54+69i -21~~~;[i^2 =-1]\\\\=33+69i

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gayaneshka [121]

Answer:

ok well your answer would be postive

Step-by-step explanation:

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2. A chemist has a 25% and a 50% acid solution. How
AnnZ [28]

Answer:

x is mL of 25% acid and y is mL of 50% acid

We set up 2 equations:

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B) .25 x + .50y = .35 * 250 which equals

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A) -.5x -.5y = -125  adding the equations we get

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y = 100 mL

Source:  http://www.1728.org/mixture.htm

Step-by-step explanation:

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3 years ago
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3 years ago
What type of triangle is triangle ABC give reasons for your answer help please I need 1 more mark But I don't know what I'm doin
ladessa [460]

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Step-by-step explanation:

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2 years ago
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Answer:

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(sry if this wasn't what you meant but pls make me brainiest if this helped! have a great day! :D)

Step-by-step explanation:

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