Mathematics Middle School

Simplify the expression: cos (7x) cos (4x) + sin (7x) sin (4x).

Its either

cos(11x)

cos(3x)

sin(11x)

sin(3x)

The ANSWER IS COS(3X)

Answers

Answer 1

Answer:

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Step-by-step explanation:

Related Questions

The number of goals scored by 7 players in a soccer season was 8, 6, 4, 8, 3, 1, and 5.
Find the mean number of goals scored by the 7 players.

The mean number of goals is ___.

Answers

the answer is 5. If you need help remembering how to find the mean, you add up all the numbers given and then divide it by how many numbers there are so for example

8+6+4+8+3+1+5= 35

35 divided by 7

=5

The mean number of goals scored by the 7th player is 5 goals.

What are mean, median, and mode?

The three main methods for identifying the average value of a set of integers are mean, median, and mode.

Adding the numbers together and dividing the result by the total number of numbers in the list yields the arithmetic mean.

The middle value in a list that is arranged from smallest to greatest is called the median.

The value that appears the most frequently on the list is the mode.

Given, The number of goals scored by 7 players in a soccer season was 8, 6, 4, 8, 3, 1, and 5.

Therefore the mean no. of goals scored by the 7th player is the sum of all the goals scored by 7 players divided by the no. of player which is,

= (8 + 6 + 4 + 8 + 3 + 1 + 5)/7.

= 35/7.

= 5.

So, the mean no. of goals scored by the 7th player is 5.

learn more about mean, mode, and median here :

https://brainly.com/question/15323584

#SPJ6

What is the outlier for the data set?

Answers

The outlier is 9

Explanation

An outlier is a number that is at least 2 standard deviations away from the mean. For example, in the set, 1,1,1,1,1,1,1,7, “7 “would be the outlier.
9 basically it’s just which one that’s not as common as the others

Dude, I just need help on this work sheet like sheeeeshhh, tyty, not sure if this is how it works but y’know.

Answers

Do you want my phone number and I could help you out if you want to?
I can’t see the worksheet

We know that the expression is 4x+40. How much will the length of the garden increase by if it uses 50 feet of fencing in total? Here is a photo to help.

Answers

Answer:

240

Since the expression is 4x + 40 we just substitute 50 in for x, so the new equation looks like this 4(50) + 40 which gets us 240.

Answer:

240

Step-by-step explanation:

Find the volume of the cylinder below:

Answers

Answer:

i beleive it would be C

Step-by-step explanation:

Answer:

c

Step-by-step explanation:

believe i c is the answer

PLZZ help with this!!!!

Answers

Answer:

2x² + 15x + 27

Step-by-step explanation:

(2x + 9)(x+3)

2x² + 6x + 9x+ 27

2x² + 15x + 27

Answer:

2x² + 15x +27

Step-by-step explanation:

Using FOIL:

⇒ 2x * x = 2x²

⇒ 2x * 3 = 6x

⇒ 9 * x = 9x

⇒ 9 * 3 = 27

It would add up to; 2x² + (6x + 9x) +27 and simplifying the parenthesis would simplify to 2x² + 15x +27.

GIVING BRAINLIEST
Look at the stem-and-leaf plot. What is the range of the numbers?

A) 2.25
B) 12
C) 21
D) 25

Answers

Answer:

A) 2.25

Step-by-step explanation:

Sana nakatulong

The answer is d) 25. 1|0 =10 and 3|5 = 35. 35-10=25

PLEASE HElp thanks for the help

Answers

Answer:

option a. vertical opposite angles

A. Vertical Angles

The angles opposite each other when two lines cross. In this example,

All of the factory workers in a steel mill either purchased their breakfast in the company cafeteria, or brought their breakfast from home on Wednesday. • 26% of the factory workers purchased their breakfast. • 148 brought their breakfast from home. How many factory workers are employed at the steel mill?

Answers

Answer:

There are 200 factory workers employed still mill

HOPE IT'S HELPS YOU

This is the form of energy that an object has due to its condition (for example, streched spring): *

Answers

Answer:

The energy is potential energy.

Mechanical energy is the energy that is possessed by an object due to its motion or due to its position. Mechanical energy can be either kinetic energy (energy of motion) or potential energy (stored energy of position).

Can you please plz help me

Answers

Answer:

6 gal= 768 FL Oz

6 gal= 96 c

PLZZZ help with this its pretty simple!

Answers

Answer:

Ok so first you want to distribute the -1 in front of the 3x^2-7x+1

Which turns the problem into

X^2+5x-6 -3x^2+7x-1

Then just combine like terms

-2x^2+12x-7

Also ^ followed by the number is the exponent

A 9 pound bag of sugar is being split into containers that hold 2/3 of a pound. How many containers of sugar will the 9 pound bag create?

A. 13 1/2
B. 15 1/3
C. 13 1/3
D. 27

Answers

9 divided by 2/3 would be 13.5, so your answer is A.

In a set of 1,000 integers from 1 to 1,000, an integer chosen at random on a single trial should be an integer from 1 to 25 about 25 out of every 1,000 trials, or one out of every 40 integers selected. A sample of 5 integers selected is shown. Does this sample represent the general rule for picking an integer from 1 to 25 in the population of integers from 1 to 1,000?

A.Yes - the sample is representative of the expected number of integers from 1 to 25 in a sample of 5 integers, which would be none or zero.
B. No - the sample is not representative of the expected number of integers from 1 to 25 in a sample of 5 integers, which would be at least 10.

Reminder: Please do not just say the answer, make sure to include your work on how you got the answer!

Answers

Answer: hi

Step-by-step explanation:

What would this be? Thanks for helping!

Answers

Answer:

if I remember correctly it would be a triangle.

Triangle would be the answer have a good day

PLS HELP WITH THIS. I’LL GIVE BRAINLIEST.

Answers

Answer:

I think the answer is A.

Step-by-step explanation:

Answer:

the answer is a ----- 4.5/C

Step-by-step explanation:

can some one answer these two questions based on the sentence below:
Line P passes through the point (-1,-4) and has a slope of 7.

Questions

1. What is the Y-Intercept of Line P?
2.Write the equation of Line P

Answers

2, why is that u might ask? 2
The answer to #1: 3
The answer to #2: y=7x+3

DO NOT SEND ME PDFS OR I WILL REPORT ANSWER CORRECTLY FOR BRAINLIEST

In a sample of 50 chickens, 45 of them laid an egg each day. If the entire chicken population has 475 chickens, how many should lay an egg each day?
21,375
428
50
45

Answers

Answer:

45

Step-by-step explanation:

A pretzel stand at the state fair sells 3 pretzels for $6.75, 6 for $13.50,
and 9 for $20.25. What is the most likely cost for 15 pretzels?

A $27.00 B $33.75
C $40.50 D $46.75

Answers

Answer: B

Step-by-step explanation:

Since 9 is 20.75 just add 6.75 each time you add 3 so 9--> 12 = 27.00

12--> 15 = 33.75

Answer: B

Step-by-step explanation:

Since 9 is 20.75 just add 6.75 each time you add 3 so 9--> 12 = 27.00

12--> 15 = 33.75

42- _____ = 31
with explanation plz

Answers

Answer:11

Step-by-step explanation:11 bc 42-11=31

Answer:

11

Step-by-step explanation:

To figure this out you just need to to do 42 - 31

PLS HELP IS DUE AT 11:59... The Question is in the Image​

Answers

B. 16. I hope it’s right.
Your answer should be 16

Please help I'm confused

Answers

Answer:

Step-by-step explanation:

For experimental: Spinning a 3 is 1/5, spinning even number 2/5, spinning odd number 3/5, spinning number less than 5 is 4/5

Order these expressions from least to greatest (look at the attached picture)

Answers

X -0.25
X-1 -1.25
1-x 1.25
-1/x 4



X-1
X
1-x
-1/x

Hope this is right and helps.

The room numbers of two adjacent classrooms are two consecutive even numbers. If their sum is 654, find the classroom numbers. Write a let statement.

Answers

Answer:

I think 654/2=327 326 and 328

.

Eve wants to buy a balance beam. The original price is $388. How much will Eve pay if she buys it during the sale?

Answers

Answer: I'm sorry but your question does not state how much it was on sale for.

Step-by-step explanation:

Is there another part to go with this? Because I might be able to help.



Also Nezuko channnnn!

can you do this one pls

Answers

Answer:

its c

Step-by-step explanation:

Cccccccccccccccccccccc

GUYS HELP ME PLEASE
this is my last question

Answers

Answer:

C=48, B=42, D=48

Step-by-step explanation:

90 - 42 = 48

C = 48 C is congruent to angle D so angle D= 48 to

Angle A is congruent to angle B so angle B = 42 to

Find the values of Y=m(x)=-sqrt(-x) for​x = –8.41, –7.84, –7.29, –6.76, –6.25, 0. List your points in a document. Then plot the corresponding points on a graph and add it to your document.

Answers

Answer: Y = x -8qrt - x 4 x - 8.41 - 7.84 - 7.29 - 6.76 - 6.25 0agga2

Step-by-step explanation:

MATH SMARTIES I WILL GIVE BRAINLIEST PLEASE ALSO GIVE AN EXPLANATION!!!!!!

Answers

Answer:

A. 1 (or 1x or x in the equation)

B. 1 (or (0, 1) on the graph)

C. y=x+1

Step-by-step explanation:

The formula for slope is rise over run, or rise/run. This means that you take the amount a line rises (or decreases) between 2 points. The run is the distance on the x-axis (___ looking line) that separate the two points. The y-intercept is going to be the point that is on the y-axis, the vertical line (| looking line). To find the equation, you take the slope, multiply that to x, and add the y-value of the y-intercept.

Hope this helps!!

A. 3/4
B. (0,1)
C. Y=3/4x+1

Attachment Below- help would be appreciated! :)

Answers

Answer:

A, B, C, E, and F

To solve this problem, you should make sure to find the equation first. Start by doing rise/run with your two given points on the graph. From the point (-1,1) you rise 4 and then run 16 over to the point (3,2). That gives us a slope of 4/16 which can then be simplified to 1/4. That means that letter F tells us the equation of the line is y= 1/4x + 5/4.

From there you want to check your points, (3,2) and (-1,1). The first number is always x and the second number is always y. So you plug the point numbers into the equation we just found to see if they work. In the photos I inserted are how to do this step.

Once you have checked your points and you know for sure they're solutions, that gave you letters A and B. Since the point (1, 3/2) is also given in one of the answers we should check that point as well. (Also done in one of the photos) Since the point came out correctly that gives us letter C and also tells us there is more than 2 solutions. This means that letter E is also correct.

Hope this helped!

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