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4 years ago

Please please help please

Mathematics

2 answers:

lara31 [8.8K]4 years ago

8 0

Answer:

that question has to be C sorry if im wrong

Step-by-step explanation:

because its moving 90 decreese

nikklg [1K]4 years ago

5 0

Answer: It will still measure the same at 30 degrees.

Step-by-step explanation:

A rotation just changes orientation, not size or measure

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4 years ago

the lenght of a rectangle is 2.4 meters long and the diagonal is 4 what is the width of the rectangle

katen-ka-za [31]

Use Pitagora
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3 years ago

Find the domain of the function? f(x )= 4x - 7

Zanzabum

The function is defined for all values of x. The domain is ...

... all real numbers.

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3 years ago

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Determine the average speed of the current in a river if a boat moves at 20 miles/hour in still water and takes 3 hours to trave

Taya2010 [7]

The speed of the current in a river is 6 miles per hour

Solution:

Given that,

Speed of boat in still water = 20 miles per hour

Time taken = 3 hours

Distance downstream = 78 miles

To find: Speed of current

If the speed of a boat in still water is u km/hr and the speed of the stream is v km/hr, then:

Speed downstream = (u + v) km/hr

Speed upstream = (u - v) km/hr

Therefore, speed downstream is given as:

$\text{ speed downstream } = \frac{distance}{time} = \frac{78}{3}\\\\\text{ speed downstream } = 26 \text{ miles per hour }$

We know that,

Speed downstream = (u + v)

26 = 20 + v

v = 26 - 20

v = 6 miles per hour

Thus speed of the current in a river is 6 miles per hour

3 0

3 years ago

4. Mr. Downey used the function f(x) = -3x2 + 12x to model the flight of a glider. In Mr. Downey's

tankabanditka [31]

Answer: 120 seconds

Step-by-step explanation: In order to find the maximum value of a function, you can take the derivative of the function and equalize the result to 0.

f'(x)=(-3x^2 + 12x)'=-6x+12=0

x=2

When x is 2, the function will reach its maximum value.

f(2)=-3(2)^2 + 12.2 = -12 + 24 = 12

The maximum value (f(x)) is equal to 12 and the time passed is 2 minutes which is equal to 120 seconds.

6 0

3 years ago

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