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3 years ago

Which of the following equations matches the function shown above?

Mathematics

1 answer:

musickatia [10]3 years ago

7 0

Answer:

D, y = cos(x -π/2)

Step-by-step explanation:

When the cosine function is shifted right by π/2 units, it looks like the sine function. That is what we have here. To shift f(x) to the right, replace x by x-(amount of shift). Here, this means the graph is described by ...

y = 2cos(x -π/2)

_____

The vertical scale factor is 2 on the graph and in all answer choices.

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PLEASE HELP. An arithmetic sequence can be

snow_tiger [21]

Answer:

<h2>The answer is 494</h2>

Step-by-step explanation:

$f(n) = -3+7(n-1) \\$

where

n is the nth term

From the question we are finding the 72nd term that's n = 72.

Substitute the value into the above formula and solve

That's

$f(72) = - 3 + 7(72 - 1) \\ = - 3 + 7(71) \\ = - 3 + 497$

We have the final answer as

Hope this helps you

8 0

3 years ago

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

<em><u>Solution:</u></em>

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

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

Speed downstream = (u + v) km/hr

Speed upstream = (u - v) km/hr

<em><u>Therefore, speed downstream is given as:</u></em>

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

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

a recipe uses 3 cups of flour and 2 cups of sugar. imagine the recipe is doubled and that 4 cups of sugar are used. use the unit

sashaice [31]

6 cups of flour because if u multiply the sugar by 2 you have to do that to the flour.
so 3*2 is 6

3 0

3 years ago

Read 2 more answers

Evaluate the expression when g=8 and h=7. <br> 4g-h

Lelechka [254]

25 because 4(8)-7 = 32-7 = 25

3 0

3 years ago

Read 2 more answers

deon earned a total of $61 from selling jewelry at a fair. He earned $5 for selling one necklace. He also earned $8 for each bra

Elis [28]

Answer: 7

Step-by-step explanation:

8x +5 = 61

subtract 5 from both sides

8x = 56 divide both sides by 8 to get x by itself

x= 7

7 0

3 years ago