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tatyana61 [14]
3 years ago
6

The submarine is cruising at a depth of 50 meters, then dives 75 meters, then ascends (moves in the direction of the surface )60

meters, and then dives 45 meters. what is the submarine's final depth
Mathematics
1 answer:
sukhopar [10]3 years ago
5 0
Interesting question... let's draw a picture.

50 m ----------
                     \              ----------------------------- \
    75 m down \           / 60 m up      45 m down ------
                        ---------

So what's going on?
Going 75 m deeper: 50 + 75
Coming up 60 m    : 50 + 75 - 60
Going 45 m deeper: 50 + 75 - 60 + 45

Final depth: 110 m
 
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From a club of 24 people, in how many ways can a group of four members be selected to attend a conference?
Kamila [148]

Answer:

255,024

Step-by-step explanation:

24 x 23 x 22 x 21

24 options for the first member

23 options for the second member

22 options for the third member

21 options for the last member

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All athletes at the Olympic games are tested for performance-enhancing steroid drug use. The imperfect test gives positive resul
Nana76 [90]

Answer:

0.4%

Step-by-step explanation:

We have two independent events

  1. The athlete who is being tested for drugs actually is using steroids.
  2. The test went wrong indicating a false result.

The probability of 1) to happen is 0.04 because "4% of all registered athletes use steroids".

The probability of 2) ti happen is 0.1 because "The imperfect test gives positive results (indicating drug use) for 90% of all steroid-users"

Then the probability of 1) and 2) to happen is given by

P=P(1)*P(2)=(0.04)(0.1)=0.004=0.4%

3 0
3 years ago
1 poir
podryga [215]

The given options are:

  • (A)x+y = 20
  • (B)7 apps and 14 movies
  • (C)x-y= 20
  • (D)y=-x+ 20
  • (E)8 apps and 12 movies
  • (F)xy= 20

Answer:

  • (A)x+y = 20
  • (D)y=-x+ 20
  • (E)8 apps and 12 movies

Step-by-step explanation:

If Elizabeth has a combined total of 20 apps and movies.

Where:

Number of apps=x

Number of Movies =y

Then:

Their total,

  • x+y=20 (Option A)

If we subtract x from both sides

x+y-x=-x+20

  • y=-x+20 (Option D)

In Option E

8 apps and 12 movies  add up to 20. Therefore, this could also apply.

4 0
3 years ago
Read 2 more answers
Help please!!!!!! And explain ur answer.. I will mark as BRAINLIEST.​
Musya8 [376]

Answer:

The total earning of commission on sales of 85, 000 will be:

3500+1050=4550

Step-by-step explanation:

  • Total sales earning = 85,000

As salesperson earns 5% commission the first 70,000.

\frac{5}{100}\:\times \:70\:000=3500

As the salesperson earns 7% commission on the sales over 70,000.

As 15000 is the sales earning on which he will get commission 7%.

Because

  • 85,000 - 70,000 = 15000

So the 7% earning of salesperson will on 15000 will be:

\:\frac{7}{100}\:\times \:15\:000=1050

Therefore, the total earning of commission on sales of 85, 000 will be:

3500+1050=4550

8 0
3 years ago
Solve:<br> 2m - 8 = -m + 10
Varvara68 [4.7K]

Step-by-step explanation:

2m+m=10+8

3m=18 /3

M=6

6 0
3 years ago
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