# What is the phase shift and period for the function y = 5cos2(θ + 45°) − 7?

QUESTION POSTED AT 26/03/2020 - 08:16 AM

QUESTION POSTED AT 26/03/2020 - 08:16 AM

5cos2(x + 45) - 7

The period for cos = 2pi/k

The k = 2 so the period = pi

The phase shift is 45 degrees to the left.

The period for cos = 2pi/k

The k = 2 so the period = pi

The phase shift is 45 degrees to the left.

36 divided by 3 plus 90 divided by 3 I think I hope this helps u

ANSWERED AT 01/04/2020 - 01:47 PM

QUESTION POSTED AT 01/04/2020 - 01:47 PM

You can cross multiply to find the answer. Start by setting up your equation:

45/30 = 60/x (30 represents half an hour)

Next, cross multiply, 45 times x, and 60 times 30:

45x = 1800 you must isolate the "x" value by using the opposite operation it is involved in. Here we have 45x (x is multiplied to 45) so we must divide 45, which will cancel itself out, leaving us with "x."

What you do on one side of the equation, you must do on the other, so divide 1800 by 45 as well, which will leave you with 40.

Working it out on paper, your equation should now look like this: x=40, which represents the amount of time it will take to fill a 60 gallon tube.

Answer: It will take**40 minutes **to fill a 60 gallon tube.

45/30 = 60/x (30 represents half an hour)

Next, cross multiply, 45 times x, and 60 times 30:

45x = 1800 you must isolate the "x" value by using the opposite operation it is involved in. Here we have 45x (x is multiplied to 45) so we must divide 45, which will cancel itself out, leaving us with "x."

What you do on one side of the equation, you must do on the other, so divide 1800 by 45 as well, which will leave you with 40.

Working it out on paper, your equation should now look like this: x=40, which represents the amount of time it will take to fill a 60 gallon tube.

Answer: It will take

ANSWERED AT 01/04/2020 - 01:47 PM

QUESTION POSTED AT 01/04/2020 - 01:47 PM

It could be 1, I'm not really sure

ANSWERED AT 01/04/2020 - 01:36 PM

QUESTION POSTED AT 01/04/2020 - 01:36 PM

I'm not sure of the b but y=1x+15 but my y-intercept is possibly wrong

ANSWERED AT 01/04/2020 - 01:34 PM

QUESTION POSTED AT 01/04/2020 - 01:34 PM

The graph has two x-intercepts because 4x2 + 28x + 49 has two different factors.FALSEThe equation 2x + 7 = 0 can be used to find a zero of the functionTRUE.The equation (2x – 7)2 = 0 can be used to find the y-intercept.FALSEThe graph has a double root at x = .TRUEThe graph intersects the y-axis at y = 49. TRUE

ANSWERED AT 01/04/2020 - 01:30 PM

QUESTION POSTED AT 01/04/2020 - 01:30 PM

Y=17400(1+0.025)^8 is your equation and with that you get $21200.21

ANSWERED AT 01/04/2020 - 01:24 PM

QUESTION POSTED AT 01/04/2020 - 01:24 PM

P(x) = x-4

k(x-4) = 5(x-4) - 8 =**5x - 28**

So the answer is 2

k(x-4) = 5(x-4) - 8 =

ANSWERED AT 01/04/2020 - 01:16 PM

QUESTION POSTED AT 01/04/2020 - 01:16 PM

Get the variable on one side and the numbers on the opposite.

5n + 5 = 45

Subtract 5 from each side of the equation.

5n = 40

And divide both sides by 5.

n = 8

So, n will equal to 8.

5n + 5 = 45

Subtract 5 from each side of the equation.

5n = 40

And divide both sides by 5.

n = 8

So, n will equal to 8.

ANSWERED AT 01/04/2020 - 01:10 PM

QUESTION POSTED AT 01/04/2020 - 01:10 PM

The Sharadaze family should leave at 10:45 am.

279(miles)/62(miles)=4.5(min.) 4.5(min.)-45(min.)=4.15

10:45+4:15=2:60 which is 3:00

which proves that the Sharadaze family should leave at 10:45 am.

279(miles)/62(miles)=4.5(min.) 4.5(min.)-45(min.)=4.15

10:45+4:15=2:60 which is 3:00

which proves that the Sharadaze family should leave at 10:45 am.

ANSWERED AT 31/03/2020 - 10:47 AM

QUESTION POSTED AT 31/03/2020 - 10:47 AM

120 seconds

360 divided by 45 is 8

8 times 15= 120

360 divided by 45 is 8

8 times 15= 120

ANSWERED AT 31/03/2020 - 10:45 AM

QUESTION POSTED AT 31/03/2020 - 10:45 AM

D=26g so the input is g, the number of gallons of gas.

ANSWERED AT 31/03/2020 - 10:38 AM

QUESTION POSTED AT 31/03/2020 - 10:38 AM

I really dont know lol.

ANSWERED AT 29/03/2020 - 11:47 PM

QUESTION POSTED AT 29/03/2020 - 11:47 PM

**Answer:**

the answer is D (22)

**Step-by-step explanation:**

ANSWERED AT 29/03/2020 - 06:31 PM

QUESTION POSTED AT 29/03/2020 - 06:31 PM

I believe the answer is that the initial number of golf balls increased

ANSWERED AT 29/03/2020 - 06:13 PM

QUESTION POSTED AT 29/03/2020 - 06:13 PM

It's D: (0,0)

This is because when you put 0 in for x your y value will equal 0 and that is one of your answers, so it's the point (0,0)

This is because when you put 0 in for x your y value will equal 0 and that is one of your answers, so it's the point (0,0)

ANSWERED AT 28/03/2020 - 07:19 PM

QUESTION POSTED AT 28/03/2020 - 07:19 PM

No graphs are shown......

ANSWERED AT 28/03/2020 - 12:59 PM

QUESTION POSTED AT 28/03/2020 - 12:59 PM

**Answer:**

**C) Horizontal compression **

**Step-by-step explanation:**

Since, if y = f(x) is a function,

Then y = a f(x) gives a **vertical stretch** if **a > 1** and gives a **vertical compression** if **0 < a < 1.**

Also, y = f(bx) gives a **horizontal stretch** when** 0 < b < 1** and gives a **horizontal compression** if **b > 1**.

Here,

The given parent function is,

f(x) = 2x

And, 3 > 1

Thus, by the above statements,

f(3x) will give a horizontal compression.

Hence, **Option C is correct.**

ANSWERED AT 28/03/2020 - 12:51 PM

QUESTION POSTED AT 28/03/2020 - 12:51 PM

8 translation: narrow or compress graph by a scale factor of 8

-6 translation: shift graph 6 points right

-6 translation: shift graph 6 points right

ANSWERED AT 28/03/2020 - 12:49 PM

QUESTION POSTED AT 28/03/2020 - 12:49 PM

**Answer:**

The function started facing up with a vertex at (0,0) since 7 was added before squaring , the graph shifts 7 units up so the vertex at (7,0) also , the function is negative do the graph is pointing down.

This means that there are two x- intercepts in g(x) and there was one x- intercepts in f(x).

ANSWERED AT 28/03/2020 - 12:34 PM

QUESTION POSTED AT 28/03/2020 - 12:34 PM

No, it would have to be 24:36 or 30:45

ANSWERED AT 28/03/2020 - 12:31 PM

QUESTION POSTED AT 28/03/2020 - 12:31 PM

**Answer:**

**32.894 seconds ≈ 33 seconds**

**Step-by-step explanation:**

**Function :**

The function models radioactive decay of krypton-91.

The decay constant k is approximately 0.07.

denotes initial amount .

**We are require to find How long will it take a quantity of krypton-91 to decay to 10% of its original amount**

So, we neet to find t at which

**Taking log both sides **

**Thus it will take 32.894 seconds ≈ 33 seconds a quantity of krypton-91 to decay to 10% of its original amount.**

ANSWERED AT 28/03/2020 - 12:28 PM

QUESTION POSTED AT 28/03/2020 - 12:28 PM

To find the mean of a given data set, add up all the values then divide by how many numbers there are.

11 + 16 + 22 + 28 + 29 + 30 + 31 + 34 + 37 + 38 + 43 + 49 + 56 + 78 + 99 =**601**

601 / 15 =**40.06666**

**Round the answer to ****40.1**** > Choice C is your answer**

11 + 16 + 22 + 28 + 29 + 30 + 31 + 34 + 37 + 38 + 43 + 49 + 56 + 78 + 99 =

601 / 15 =

ANSWERED AT 28/03/2020 - 12:19 PM

QUESTION POSTED AT 28/03/2020 - 12:19 PM

Amplitude: the height of the graph from the peak to the axis. On the unit circle it would be the radius (max and min values) at 0, pi/2, 2pi

Period: the length of one full cycle of the cos graph. On the unit circle it is the circumference. The distance around a circle with radius = 1.

Domain: the x value or the values on the horizontal axis. On the unit circle these would be the radian measures around the unit circle such as pi/6, pi/4,

pi/3, pi/2.

Range: the y value or the values on the vertical axis. On the unit circle it would be the cosine value for each radian measure. Such as cos pi/4 = (sqrt2)/2, cos pi/3= 1/2.

X-intercepts: the points where the graph crosses the horizontal axis. On the unit circle these are the cosine values when theta is at the vertical points of the unit circle, pi/2 and 3pi/2.

Period: the length of one full cycle of the cos graph. On the unit circle it is the circumference. The distance around a circle with radius = 1.

Domain: the x value or the values on the horizontal axis. On the unit circle these would be the radian measures around the unit circle such as pi/6, pi/4,

pi/3, pi/2.

Range: the y value or the values on the vertical axis. On the unit circle it would be the cosine value for each radian measure. Such as cos pi/4 = (sqrt2)/2, cos pi/3= 1/2.

X-intercepts: the points where the graph crosses the horizontal axis. On the unit circle these are the cosine values when theta is at the vertical points of the unit circle, pi/2 and 3pi/2.

ANSWERED AT 28/03/2020 - 12:19 PM

QUESTION POSTED AT 28/03/2020 - 12:19 PM

The answer would be B 23

ANSWERED AT 28/03/2020 - 12:11 PM

QUESTION POSTED AT 28/03/2020 - 12:11 PM

A and C! He need to divide and the answer is 4

ANSWERED AT 28/03/2020 - 12:07 PM

QUESTION POSTED AT 28/03/2020 - 12:07 PM

2x + 4

If x = 45

2 (45) + 4

= 90 + 4

= 94

If x = 45

2 (45) + 4

= 90 + 4

= 94

ANSWERED AT 28/03/2020 - 12:05 PM

QUESTION POSTED AT 28/03/2020 - 12:05 PM

No. If you do 6+1/3 and 24+1/3 it is not equal.

ANSWERED AT 28/03/2020 - 12:04 PM

QUESTION POSTED AT 28/03/2020 - 12:04 PM

1,3 and 5 on ed.genuity

ANSWERED AT 28/03/2020 - 12:02 PM

QUESTION POSTED AT 28/03/2020 - 12:02 PM

10 and so what is the

ANSWERED AT 28/03/2020 - 11:59 AM

QUESTION POSTED AT 28/03/2020 - 11:59 AM

M=3.50h

it will take juan about 4.5 hours to earn $15

it will take juan about 4.5 hours to earn $15

ANSWERED AT 28/03/2020 - 11:57 AM

QUESTION POSTED AT 28/03/2020 - 11:57 AM