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3 years ago

Simplify the given expression.

Mathematics

2 answers:

Alinara [238K]3 years ago

7 0

(1 + 3i) + (2 - 5i) = 1 + 3i + 2 - 5i = 3 - 2i

forsale [732]3 years ago

3 0

Since you can only perform addition and subtraction on variables that have the same variable following them, the correct answer is B. 3 - 2i.
Here's why:
1 + 2 + (3i - 5i) =
3 - 2i

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What type of triangle is formed by joining the points D(7, 3), E(8, 1), and

KiRa [710]

D(7, 3), E(8, 1), and F(4, -1)

We calculate the squared distances between the points:

$DE^2 = 1^2 + 2^2 = 5$

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Each cone of the hourglass has a height of 12 millimeters. The total height of the sand within the top portion of the hourglass

Harman [31]

The solution would be like this for this specific problem:

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volume (sand) = pi * 4^2 * 36

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3 years ago

DOES ANYONE KNOW THE ANSWER?????????

givi [52]

There's only information to answer question C.

We can only know that 32 marbles were chosen. (yellow and black)

Why?

To answer the first two questions (a and b), we need to know the total number of marbles, so, we can only answer the last question (c).

We know that 7/10 of the 20 yellow marbles were chosen.

So, calculating we have:

$\frac{7}{10}*20=14(yellow)$

Also, we know that 18 black marbles were chosen, so, the total of marbles chosen is equal to 32 (yellow marbles and black marbles)

$TotalMarbles=14(yellow)+18(black)=32marbles$

Have a nice day!

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