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tiny-mole [99]
3 years ago
9

Add the complex numbers. (-2-4i)+(-12+7i) = ??

Mathematics
2 answers:
aliya0001 [1]3 years ago
7 0
(-2-4i) + (-12+7i)

= -2-3i -12 + 7i

= -14 + 4i
lions [1.4K]3 years ago
6 0

Question:

(-2 - 4i) + (-12 + 7i)

= -14 + 3i

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at 1:30 in the afternoon an old freight train and a new dart express train pull out of the new garland station going in opposite
zalisa [80]

Answer:

V_{E} = -22.5 / 15 = 1.5 miles/minute\\V_{F} = 7.5 / 15 = 0.5 miles/minute

Step-by-step explanation:

To answer this problem, we must bear in mind that the express train travels 3 times faster than the freight train.

If we call F the distance that the freight train travels and we call E at the distance that the express train travels, we must have the distance between them after 15 minutes it must be 30 miles.

So

F + E = 30\\

We also know that:

E = 3F

Since the express train travels 3 times faster than the freight train.

So, like both equations, we have to:

F + 3F = 30\\F = 30/4\\F = 7.5 miles\\

Then E = 7.5*3 = 22.5 miles in the opposite direction.

This is the distance you traveled in 15 minutes.

Therefore, the speed of the express train (V_{E}) is the distance traveled between the time it did

V_{E} = -22.5 / 15 = 1.5 miles/minute\\V_{F} = 7.5 / 15 = 0.5 miles/minute

3 0
3 years ago
You make a bet on a horse race. There's a 10% chance of making $300 and a 5% chance of making $500. There's an 85% chance of los
lbvjy [14]
425 or 225 i think im not really sure
7 0
2 years ago
Find the missing side of the triangle
slamgirl [31]

Answer:

the answer would be 11.62

Step-by-step explanation:

16^2 -11^2= 11.62^2

4 0
3 years ago
An 8 foot square floor is to be covered with square tiles measuring 8 inches on each side. If each tile costs 50 cents, how much
wariber [46]

9514 1404 393

Answer:

  (c) $72

Step-by-step explanation:

Each tile is 8/12 ft = 2/3 ft on a side. Then 8/(2/3) = 12 tiles will fit along each edge of the square area to be tiled. That is ...

  12 × 12 = 144

tiles will be needed to cover the area.

The cost of 144 tiles at $0.50 each is ...

  (144)($0.50) = $72.00

8 0
3 years ago
Can someone explain how to get the answer?
Murljashka [212]
A = ((6 + 7 + 6) . 8)/2
A = 19 . 4
A = 76
6 0
3 years ago
Read 2 more answers
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