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spin [16.1K]
3 years ago
6

Add or subtract as indicated. (3 + 3i) - (3 + 2i) + (1 + 41)

Mathematics
1 answer:
Anon25 [30]3 years ago
6 0

Answer:

i+42

Step-by-step explanation:

(3+3i) - (3+2i) + (1+41)

= 3+3i-3-2i+1+41

= 3i-2i+1+41

= i+42

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The cost of a jacket increased from $70.00 to $77.00. What is the percentage increase of the cost of the jacket?
astraxan [27]

Answer:

There is an increase of 10%

Step-by-step explanation:


3 0
3 years ago
A large pool has a faucet to allow water to enter the pool and a drain to allow water to leave the pool.
yaroslaw [1]

Answer:

-34496 gallons = 34496 gallons less

Step-by-step explanation:

In 112 minutes, 1215(112) = 136080 gallons of water is added by the faucet

In 112 minutes, 1523(112) = 170576 gallons of water are drained from the pool.

So, assuming that the pool is not completely drained in the 112 minute time interval, the change in the amount of water = 136080 - 170576 = -34496 gallons; i.e., the amount of water in the pool is 34496 gallons less.

7 0
3 years ago
An island has 12 fur seal rookeries​ (breeding places). To estimate the fur seal pup population in Rookery​ A, 6334 fur seal pup
Sati [7]

Answer:

37080

Step-by-step explanation:

To solve this problem we need to use proportions:

We don't know the total population in Rookery A but we know that 6334 of the total were tagged. Later, from a sample of 1200 pups, 205 were previously tagged.

The proportions we get are:

\frac{p}{6334} =\frac{1200}{205} where p is the total population.

Now we will solve the proportion for p:

\frac{p}{6334} =\frac{1200}{205}\\p=\frac{(6334)(1200)}{205} \\p=\frac{7600800}{205} \\p=37077.07

Therefore the total number of fur seal pups is 37077 ≈ 37080

4 0
3 years ago
Geometry question for my practice assignment
Tcecarenko [31]
5/3

Csc is equal to 1/sin

Sin= opposite/hypotenuse

So just take the inverse of what sine would be

Sin= 3/5

So Csc=5/3 :)
4 0
3 years ago
Given a mean of 61.2 and a standard deviation of 21.4, what is the z-score of the value 45 rounded to the nearest tenth?0.8−0.90
kherson [118]

Given: Mean μ = 61.2 and standard deviation σ =21.4

The Z score of the value x=45 is given by

Z = \frac{x - mean}{standard deviation}

Z = \frac{45 - 61.2 }{21.4}

Z = \frac{-16.2}{21.4}

Z = -0.757

The z-score value for 45 rounded to nearest tenth is -0.8

6 0
3 years ago
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