What is the relationship between
the sine and cosine of complementary angles?
Explain your reasoning and use the relationship
to find cos 50 if sin 40 0.64.​

Answer:

a- no they are polling

b-yes there is no point

Step-by-step explanation:

Answer:

2x^2 + 5x - 12

Step-by-step explanation:

(2x - 3) (x + 4)

= 2x^2 + 8x - 3x -12

= 2x^2 + 5x - 12

Answer:

n = 7 , n = -7

Step-by-step explanation:

n^2 - 49 = 0 (Given)

n^2 = 49 (Add 49 on both sides)

n = plus or minus 7 (Square root on both sides)

Answer:  “ n  =  ± 7  ” .

_________________________________

       →  that is;   “ n = 7 ” ; or:  “ n = -7 ” .

_________________________________

Step-by-step explanation:

_________________________________

Given:

   n²  − 49 = 0 ;  Solve for "n" .

_________________________________

Add "49" to each side of the equation:

   →  n² − 49 + 49 = 0 + 49 ;

to get:

  →   n²   =  49 .

_________________________________

Now, take the "square root" of each side of the equation;

  to isolate "n" on one side of the equation;

   & to solve for "n" ;

_________________________________

  →  | √(n²) | = |√49|  ;

to get:

 →  n = ±  49 .

_________________________________

Hope this helps!

 Best wishes in your academic endeavors

          — and within the “Brainly” community!

_________________________________

The algebraic expression '3s + 2.15' can represent a real-life situation where you're shopping for food. If sandwiches cost $3 each and a soda costs $2.15, the total you'd spend on 's' sandwiches and one soda is 3s + 2.15 dollars.

Here is a scenario that could represent the expression 3s + 2.15: Imagine you're in a store and each sandwich costs $3.00. You're planning to buy 's' number of sandwiches. Now, let's say you also want to buy a soda which costs $2.15. The total cost you will spend in the store would be the cost of the 's' sandwiches plus the cost of the soda, which can be represented by the expression 3s + 2.15. So if you bought 2 sandwiches, the total cost would be 3*2 (for the sandwiches) + 2.15 (for the soda) = $8.15.

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Answer:

C

Step-by-step explanation:

4 times 2x is 8x and 4 times -6 is -24 and this put together would equal 8x - 24. So, it is B

Answer:

its c!

Step-by-step explanation:

4 (2x-6) and 8x-24 are equivalent i could elaborate a little more

Answer:

6/8 is greater than 1/2

Step-by-step explanation:

6 is over half of 8, its 3/4 of 8

Answer:

Bigger

Step-by-step explanation:

It is bigger. 1/2 equals 4/8, and 6/8 is greater than 4/8.

Answer:

(x + 2)² + (y + 1)² = 2

Step-by-step explanation:

The equation of a circle in standard form is

(x - h)² + (y - k)² = r²

where (h, k) are the coordinates of the centre and r is the radius.

Here (h, k) = (- 2, - 1) and r = [tex]\sqrt{2}[/tex], thus

(x - (- 2))² + (y - (- 1))² = ([tex]\sqrt{2}[/tex] )², that is

(x + 2)² + (y + 1)² = 2 ← equation of circle

Answer: Answer is 2 can I get brainliest pls

Step-by-step explanation: Have a good one

Answer:

72

Step-by-step explanation:

180-78-30=72

x= 2,3

hope that helped

This results in a final answer of 94.

The question asks for the calculation of 2 times the difference of 73 and twice the sum of 9 and 4. Let's break it down step by step:

Therefore, 2 times the difference of 73 and twice the sum of 9 and 4 equals 94.

Answer:

x= 13, 14, 15

Step-by-step explanation:

x-8 > 4

+8 +8

x > 12

13

14

15

Answer:

5

Step-by-step explanation:

1. Identify the changes (Δ) in each consecutive pair of x-values and y-values

The changes in x (Δx) are 1, 1, and 1. The changes in y (Δy) are 5, 5, and 5.

2. Calculate the corresponding values of Δy/Δx

In each case, Δy/Δx = 5.

The slope is 5.

I have organized the calculations in the table below.

[tex]\begin{array}{cc|cc|c}\mathbf{x} & \mathbf{\Delta x} & \mathbf{y} & \mathbf{\Delta y} & \mathbf{\Delta y/ \Delta x} \\0 & & 0 & & \\ & 1 & & 5 & \mathbf{5} \\1 & & 5 & & \\ & 1 & & 5 & \mathbf{5} \\2 & & 10 & & \\ & 1 & & 5 & \mathbf{5} \\3 & & 15 & & \\\end{array}[/tex]

Answer:

15% discount means you're paying 85% of the marked price because total is 100% and 100-15 = 85%

Let X be the naked price

Paid = marked price - discount

Paid = X - (15/100 × X)

Using distribution property,

Paid = X(1 - 15/100)

Paid = X[(100-15)/100]

Paid = X(85/100)

Which is 85/100 × X

Hence 85% of X

Answer: 85% = 0.85

While 15% = 0.15

Step-by-step explanation:

Percentage is a fraction whose denominator is 100. So if we say 15%, we mean 15/100 = 0.15.

If want to find 15% of a 100, it means 15% of 100 = 15/100 × 100 = 15.

To find 85 % of 100 means 85/100 × 100= 85

hence subtraction of 15% from 100% is 85%

Therefore 15% = 15/100 = 0.15

While 85% is 85/100 = 0.85

Answer:

192π yd²

Step-by-step explanation:

Surface area of a cylinder = 2πrh

Given,  r = 8yd , h = 12yd

S. A = 2 × π × 8 × 12

S. A = 192π yd²

I hope this was helpful, please mark as brainliest

Answer: IM NOT GOING TO ANSWER YOUR QUESTION DUDE LEARN FROM YOUR TEACHER  STOP CHEATING CLEARLY YOUR NOT SMART AND YOUR GOING TO FAIL YOU MATH CLASS AND EVERY OTHER SUBJECT HAHAHAHAHAHAHAHAHHAHAHAHHAHAHAHAH

Answer:

(-1, -2.5)

Step-by-step explanation:

the midpoint of a segment is [tex](\frac{x1+x2}{2} ,\frac{y1+y2}{2}[/tex][tex])[/tex], given points (x1, y1) and (x2, y2)

[tex]midpoint=(\frac{-9+7}{2}, \frac{3-8}{2} )[/tex] [tex]= (\frac{-2}{2}, \frac{-5}{2} ) = (-1, -2.5)[/tex]

Answer:

m (-1, -2.5)

Step-by-step explanation:

x1=-9             x2=7             y1= 3            y2=-8

        -9+ 7        3+ -8

m= ------------ , -----------

            2             2

m= -2/2, -5/2

m (-1, -2.5)

Answer:

the answer is C) -1.415

Step-by-step explanation:

Just did the test and plugged it into desmos this is the closest answer

Answer:

the answer is -1.415

Step-by-step explanation:

Just finished the test and the correct answer is -1.415

Answer:

x = - 4, x = - [tex]\frac{1}{5}[/tex]

Step-by-step explanation:

To find the zeros let g(x) = 0, that is

(- 5x - 1)(2x + 8) = 0 ← in standard form

Equate each factor to zero and solve for x

- 5x - 1 = 0 ( add 1 to both sides )

- 5x = 1 ( divide both sides by - 5 )

x = [tex]\frac{1}{-5}[/tex] = - [tex]\frac{1}{5}[/tex]

2x + 8 = 0 ( subtract 8 from both sides )

2x = - 8 ( divide both sides by 2 )

x = - 4

Thus

smaller x = - 4

larger x = - [tex]\frac{1}{5}[/tex]

Answer:

55°

Step-by-step explanation:

use The Law of Cosines

cos p = (PR² + PQ² - QR²) / 2 x PR x PQ

         = (144 + 25 - 100) / 120

         = 69 / 120

         =0.575

∠P = 55°

Answer:

55 degrees

Step-by-step explanation:

i took the test

Answer: 3/4

Step-by-step explanation:

To take this ratio to its simplest form, we have to divide by a value divisible by the numerator and denominator.

3 is a divisible value, therefore,

9/12 = 9 ÷ 3 = 3

12 ÷ 3 = 4

Thus, 9/12 = 3/4

I hope this helps.

Answer:13.5

Step-by-step explanation:

x= 12*9/ 8

13.5 paints are needed bro

i hope you understand the ans

i didnt add statments

By applying formula of area of rectangle we got that if susie is painting a wall that is 12 feet tall and 9 feet wide if each can of paint has enough paint to cover 8 square feet then total 12 cans of paint will susie need to cover the whole wall​

Rectangle is a regular quadrilateral with all angle equal to right angle.

Given that wall that is 12 feet tall and 9 feet wide

So area of rectangle = length[tex]\times[/tex]width

Area= [tex]12\times 8=96[/tex]

Given that each can of paint has enough paint to cover 8 square feet

Hence number of cans required = 96/8=12

By applying formula of area of rectangle we got that if susie is painting a wall that is 12 feet tall and 9 feet wide if each can of paint has enough paint to cover 8 square feet then total 12 cans of paint will susie need to cover the whole wall​.

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The circumference of the soccer ball can be found using the formula for the circumference of a circle, to which 10 inches is then added to find the total length of the ribbon Regina needs.

The problem involves understanding the mathematical concept of circumference. The circumference of a circle is given by the formula C = 2πr, where r is the radius of the circle. In this case, the soccer ball has a radius of 4.5 inches. Therefore, the circumference of the soccer ball would be C = 2π(4.5) inches.

Then, the problem states that the ribbon needs to be 10 inches longer than the circumference of the ball. So the total length of the ribbon that Regina needs is C + 10 inches. By substituting the values, we get the length of the ribbon needed.

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Answer:

y = -5

Step-by-step explanation:

x= (-22+2y)/4 = -3+y

-22+2y = 4(-3+y)

-22+2y = -12+4y

-22+12 = 4y-2y

-10 = 2y

-10/2 = y

-5 = y

Answer:

x = -8

y = -5

Step-by-step explanation:

From the given expression, let's make two equations

4x   -   2y =   - 22--------------------------(i)

-x    +   y  =     3-----------------------------(ii)

to easily substitute, lets make another equation from equation (ii)

y  =  3  +   x

substitute (y=3+x) in equation (i)

4x   -   2 (x+3)   =   -22

4x  -   2x   -  6   =   -22

2x  -  6   =   -22

2x       =   -22   +  6

2x    =  -  16

x   = -16  /  2

x  =   -  8

lets solve for (y) by substituting   (x =  - 8) in equation   (ii)

-  (- 8)  +  y = 3

8  +  y  =   3

8  +  y  = 3

y  =  3  -  8

y  =  -  5

Therefore:

x  =  -  8

y  =  -  5

PLEASE FIND ATTACHED FILE

Maths is fun, keep learning!

Answer:

40

Step-by-step explanation:

4(3+7)

4(10)

40

Answer:

7500

Step-by-step explanation:

0.2 x 7500  divided by 100 =15

Answer: the answer Are 60,120,180

Step-by-step explanation:

Answer:

60,120,180

Step-by-step explanation:

The measure of angle A is 88°.

Solution:

Given data:

∠A = (2x – 40)°, m∠B = 116° and ∠D = x°

A quadrilateral inscribed in a circle is called cyclic quadrilateral.  

∠B and ∠D are opposite angles in a cyclic quadrilateral.  

In cyclic quadrilateral, opposite angles are supplementary.  

⇒ m∠B+ m∠D = 180°

⇒ 116° + x = 180 °

Subtract 116° from both sides of the equation, we get  

⇒ x = 64 °

To find the measure of angle A:

m∠A = (2x – 40)°

        = 2(64°) – 40°

m∠A = 88°

Hence the measure of angle A is 88°.

Answer:

Probability of having an accident = 20% o 0.2

Thus,

Expected number of years = 1/probability of accident = 1/0.2 = 5

Hence,

3.    Every 5 years  is the correct option.

Step-by-step explanation:

The factory will expect to have an accident every 5 years.

The probability of having an accident in the factory = 20% = 20/100 = 0.2

It should be noted that the highest likelihood for an event happening is 100% which is represented by 1.

Therefore, the number of years that the factory expect to have an accident will be:

= 1 / probability of having an accident

= 1/0.2

= 5 years

In conclusion, the factory will expect an accident every 5th year.

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Answer:

Yes, this is true.

Step-by-step explanation:

If you substitue x for -1 you get -3(-1+8)=-21, Then you add -1 and 8 so you should get 7. After, you multiply 7 times -3 you get -21. Proving this statement is correct.

Answer:

See below.

Step-by-step explanation:

We can solve for x:

−3(x+8) = −21

Distribute the -3 over the parentheses:

-3x - 24 = -21

Add 24 to both sides:

-3x -24 + 24 = -21 + 24

-3x = 3

Divide both sides by -3:

x = -1.

So that proves the original equation.

Answer:  Teacher graded mine and it was: false, true, true, false, true

Step-by-step explanation: