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Shkiper50 [21]
3 years ago
8

I will give brainliest if you answer all correctly ​

Mathematics
1 answer:
miskamm [114]3 years ago
7 0

Answer:

I think 13 is C

Step-by-step explanation:

71+52= 123

180-123= 57

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A submarine left Diego Garcia five hours before a cruise ship. The ships traveled in opposite directions. The cruise ship travel
Rina8888 [55]

Answer:

The speed of the submarine is 15.429 miles per hour.

Step-by-step explanation:

Let suppose that both ships travel at constant velocities. As we know that both travel in opposite directions, it is supposed that cruise ship moves in +x direction, whereas submarine in -x direction. Kinematic equations for each sheep are described below:

Ship

x_{Sh} = x_{o} + v_{Sh}\cdot t

Submarine

x_{Su} = x_{o}+v_{Su}\cdot t

Where:

x_{o} - Position of Diego Garcia island, measured in miles.

x_{Sh}, x_{Su} - Current positions of ship and submarine, measured in miles.

v_{Sh}, v_{Su} - Velocities of ship and submarine, measured in miles per hour.

t - TIme, measured in hours.

If we know that x_{Sh} - x_{Su} = 241\,mi, v_{Sh} = 19\,\frac{mi}{h} and t = 7\,h, then:

x_{Sh} - x_{Su} = (v_{Sh}-v_{Su})\cdot t

We clear now the velocity of submarine:

\frac{x_{Sh}-x_{Su}}{t} = v_{Sh}-v_{Su}

v_{Su} = v_{Sh}-\frac{x_{Sh}-x_{Su}}{t}

v_{Su} = 19\,\frac{mi}{h} -\frac{241\,mi}{7\,h}

v_{Su} = -15.429\,\frac{mi}{h}

Speed of the submarine is the magnitude of its velocity, which is 15.429 miles per hour.

4 0
3 years ago
∠1 and ​ ∠2 ​ are vertical angles. ∠2 ​ has a measure of 93°. What is the measure of ​ ∠1 ​? Enter your answer in the box. °
kirza4 [7]
The measure of ∠1 is also <span>93° because vertically opposite angles are equal.</span>
6 0
3 years ago
Read 2 more answers
Can someone find the answer
Alexus [3.1K]

Answer:

it is B.

Step-by-step explanation:

B. can i have brainlyest please

7 0
2 years ago
Read 2 more answers
B is the midpoint of AC, AB=5x and BC=2x+9 find AB,BC, and AC
german

Answer:

Step-by-step explanation:

5x  = 2x + 9

3x = 9

x = 3

AB= 5(3)= 15

BC= 2(5) + 9= 10 + 9 = 19

AC= 15 + 19 = 34

8 0
3 years ago
Please help with this
Dmitriy789 [7]

Step-by-step explanation:

All has been answered... send me any questions at comments

8 0
2 years ago
Read 2 more answers
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