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prisoha [69]
2 years ago
5

Help me please i need help

Mathematics
2 answers:
Deffense [45]2 years ago
8 0

Answer:

B. 11

Step-by-step explanation:

Hope this helps! ;-)

Liono4ka [1.6K]2 years ago
3 0

Answer:

11

Step-by-step explanation:

15-12/3

Parenthesis

Exponents

Multiplication

Division

Addition

Subtraction

15-4 = 11

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If you save 100 dollars a week for 4 years how much money will you have
dezoksy [38]

Answer:

$20,800

Step-by-step explanation:

There are 52 weeks in a year, therefore, do 100 x 52 = $5,200

You earn $5,200 a year, for 4 years so do 5,200 x 4 = $20,800

6 0
2 years ago
The temperature at noon was 88F by 4pm the temperature was 72F . Find the rate of change
dlinn [17]
The rate of change would be 23F because if you can see the paradigm of the time equionix you would see that if you divide 10 by infinity and you got the coordinates of the center of the earth divided by the miles of earth to the sun you would get the inpenetrable response of the human bloodline reaction of the center of the earth and the global warming economy of the united states congress 
6 0
3 years ago
Read 2 more answers
an airplane travels 5424 km against the wind in 8 hours and 6624 km with the wind in the same amount of time. what is the rate o
liq [111]

Answer:

The rate of the plane is 753 km/h while the rate of the wind is 75km/h

Step-by-step explanation:

Here in this question, we are interested in calculating the rate of the plane in still air and the rate of the wind.

Since we do not know these rates, we shall be representing both using variables.

Let’s represent the rate of the plane in still air by x kmph while the rate of the wind be represented by y kmph

Now, for us to calculate the speed of the plane while it travels against the wind, that would be the speed of the plane in still air minus the speed of the wind.

Mathematically, that would be (x-y) kmph

Now the speed of the plane while it travels with the wind would be its speed in still air plus the speed of the wind.

Mathematically, that would be;

(x + y) kmph

From the question;

The plane journeyed 5424 km against the speed in 8 hours, this means that its speed will be 5424/8 = 678 kmph

Thus, that means;

x -y = 678 •••••••(i)

Now, traveling with the wind , its speed will be ;

6624/8 = 828 kmph

Thus;

x + y = 828 kmph •••••••(ii)

So we have two equations to solve simultaneously;

Let’s add both together;

x -y + x + y = 828+ 678

2x = 1,506

x = 1506/2

x = 753 kmph

From ii

x + y = 828

y = 828 - x

y = 828 - 753

y = 75 kmph

5 0
3 years ago
Please help with problem
Likurg_2 [28]

9514 1404 393

Answer:

  • ∠CAE ≈ 16.7°
  • DF ≈ 5.3

Step-by-step explanation:

a) Angle CAE can be found using the tangent relation.

  tan(∠CAE) = CE/AE

  tan(∠CAE) = 6/20

  ∠CAE = arctan(6/20) ≈ 16.7°

__

b. The length of DF can be found using the law of cosines.

  DF² = FA² +DA² -2·FA·DA·cos(A)

  DF² = 14² +10² -2·14·10·cos(16.7°) ≈ 27.8086

  DF ≈ √27.8086

  DF = 5.3

8 0
3 years ago
Guys pls help fast chose option
galina1969 [7]

Answer:

what do I do again

Step-by-step explanation:

6 0
2 years ago
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