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3 years ago

6

Which description matches the transformations y= cos x undergoes to produce y= -3cos(x) +1

1 answer:

Reil [10]3 years ago

3 0

Answer:

Vertical stretch by factor 3 reflections through the x-axis then a vertical shift up 1 unit .

Step-by-step explanation:

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What can you say about the y-help urgent!!!

weeeeeb [17]

The correct answer is ( A )

let me know if you need explanation.

3 0

3 years ago

The sum of two numbers is 9.9, and the sum of the squares of the numbers is 53.21. What are the numbers?

Snezhnost [94]

Answer:

There are two possibilities:

$x_{1} = 3.5$ and $y_{1} = 6.4$

$x_{2} = 6.4$ and $y_{2} = 3.5$

Step-by-step explanation:

Mathematically speaking, the statement is equivalent to this 2-variable non-linear system:

$x + y = 9.9$

$x^{2} + y^{2} = 53.21$

First, $x$ is cleared in the first equation:

$x = 9.9 - y$

Now, the variable is substituted in the second one:

$(9.9-y)^{2} + y^{2} = 53.21$

And some algebra is done in order to simplify the expression:

$98.01-19.8\cdot y +2\cdot y^{2} = 53.21$

$2\cdot y^{2} -19.8\cdot y +44.8 = 0$

Roots are found by means of the General Equation for Second-Order Polynomials:

$y_{1} \approx \frac{32}{5}$ and $y_{2} \approx \frac{7}{2}$

There are two different values for $x$ :

$y = y_{1}$

$x_{1} = 9.9-6.4$

$x_{1} = 3.5$

$y = y_{2}$

$x_{2} = 9.9 - 3.5$

$x_{2} = 6.4$

There are two possibilities:

$x_{1} = 3.5$ and $y_{1} = 6.4$

$x_{2} = 6.4$ and $y_{2} = 3.5$

5 0

2 years ago

(a + 8)(b + 3)<br><br> ab + 8a + 3b + 24<br> ab + 3a + 8b + 24<br> 11ab<br> 24ab

pochemuha

The answer is ab+3a+8b+24.

5 0

2 years ago

Read 2 more answers

randy read a book in the afternoon. He looked at his watch when he started and finishing reading. How long did randy read

mr Goodwill [35]

The length of the time that randy read is 45 minutes.

<h3>What is time?</h3>

Time is known to be an element that is often measured or that is measurable.

From the image attached, Randy started reading at 4:10 and Randy finished reading at 4:55.

We therefore need to subtract:

4:55 - 4:10 = 45 minutes

So, Randy is said to read for 45 minutes.

It is a period via which an action, process, etc. is alive or continues such as duration. One can tell the time by counting the minutes and seconds.

Learn more about time from

brainly.com/question/25607827

6 0

2 years ago

Which expression is equivalent to (3x^5+8x^3)-(7x^2-6x^3)

inn [45]

Answer: look at the picture that the answer to it

Step-by-step explanation: Hope this help :D

7 0

2 years ago