HELP ME PLZZ I NEED HELP WITH THIS !

Answer:

X=2

Step-by-step explanation:

Make an equation: the scales are equal, so

x + x + 3 = 7

2x + 3 = 7

2x = 4

x = 2

Answer:  see proof below

Step-by-step explanation:

Use the following Half-Angle Identities:

sin² A = (1 - cos 2A)/2

cos² A = (1 + cos 2A)/2

Proof LHS → RHS:

LHS:                          sin⁴ A

Expand:                     sin² A · sin² A

[tex]\text{Half-Angle:}\qquad \qquad \bigg(\dfrac{1-\cos (2A)}{2}\bigg)\bigg(\dfrac{1-\cos (2A)}{2}\bigg)[/tex]

[tex]\text{Distribute:}\qquad \qquad \dfrac{1-2\cos (2A)+\cos^2 (2A)}{4}[/tex]

[tex]\text{Half-Angle:}\qquad \qquad \dfrac{1-2\cos (2A)+\frac{1+\cos (2\cdot 2A)}{2}}{4}[/tex]

[tex]\text{Simplify:}\qquad \qquad \dfrac{\frac{2}{2}[1-2\cos (2A)]+\frac{1+\cos (4A)}{2}}{4}[/tex]

                         [tex]=\dfrac{2-4\cos (2A) + 1 + \cos (4A)}{8}[/tex]

                         [tex]=\dfrac{1}{8}\bigg(3-4\cos (2A)+\cos (4A)\bigg)[/tex]

LHS = RHS  [tex]\checkmark[/tex]

Let's start from LHS...

LHS = sin^4A = sin^2A * sin^2A

We can apply a few formulas here;

cos 2A = 1 - 2sin^2A

sin^2A = (1 - cos2A) / 2

cos2A = 2cos^2A - 1

cos^2A = (1 + cos2A) / 2

According to the second formula, sin^2A * sin^2A = (1 - cos2A) / 2 * (1 - cos2A) / 2.

(1 - cos2A) / 2 * (1 - cos2A) / 2 = 1/4(1 - cos2A)^2

We can simplify "(1 - cos2A)^2." Remember that (a - b)^2 = a^2 - 2ab + b^2. Similarly (1 - cos2A)^2 = (1 - 2cos 2A + cos^2 2A);

1/4(1 - cos2A)^2 = 1/4(1 - 2cos 2A + cos^2 2A)

According to the fourth formula, cos^2 2A = (1 + cos4A) / 2;

1/4(1 - 2cos 2A + cos^2 2A) = 1/4(1 - 2cos 2A + (1 + cos4A) / 2)

= (taking LCM) 1/4( (2 - 4cos 2A + 1 + cos4A)/2 )

= (simplified) 1/8(3 - 4cos 2A + cos 4A)

Answer:

neither

Step-by-step explanation:

they dont intersect with each other

Answer:

It is not true

Step-by-step explanation:

-4 is closer to 0 than -5 1/2

The closer the negative number to 0 the bigger it is

Answer:

55

Step-by-step explanation:

No matter what happens in between, the average rate of change between 2 points of any interval is the slope of the 2 points of the interval.

The 2 points are (-8, -50) and (-6, 60), and we need to find the slope (which, as a reminder, is change in x over change in y):

(60-(-50))/(-6-(-8)) = (110)/(2)=55

Therefore, the average rate of change between the interval -8≤x≤-6 is 55.

Answer:

the answer would be C

Step-by-step explanation:

the opposite of exponents is square root it

Answer:

x=40/21

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

−3x−3(6x−11)=−7

−3x+(−3)(6x)+(−3)(−11)=−7(Distribute)

−3x+−18x+33=−7

(−3x+−18x)+(33)=−7(Combine Like Terms)

−21x+33=−7

−21x+33=−7

Step 2: Subtract 33 from both sides.

−21x+33−33=−7−33

−21x=−40

Step 3: Divide both sides by -21.

−21x

−21

=

−40

−21

Answer:

x= -5

Step-by-step explanation:

just graphed it . y = 4 is a flat horizontal line.

x=5 is a vertical line that passes through (5,2)

Answer:

0.73

Step-by-step explanation:

3 2/5 = 17/5, 2 2/3 = 8/3

17/5 - 8/3

3/3 x 17/5 = 51/15

5/5 x 8/3 = 40/15

51/15 - 40/15 = 11/15

11/15= 0.73

Answer:

George's mistake would be:

Instead of 2x + 40, she has made - x + 20.

Step-by-step explanation:

Slope - Intercept Form = y = mx + b

y + 20 = 2(x +20)

y + 20 = 2x + 40

   - 20          - 20

----------------------

y = 2x + 20

(Should have been the answer)

BUT,

George's Solving:

y + 20 = 2(x + 20)

y + 20 = -x + 20

George's Mistake would be her miscalculation during her 2nd step. Where instead of distributing 2 to (x + 20), she has changed it to -x + 20, when in reality, it should have been 2x + 40.

Answer:

c. 628

Step-by-step explanation:

3, 145 ÷5 =628

plz mark brainliest

Answer:

The answer is C. 628

Answer:

first setup your problem. it should look like this :

Answer:

54

Step-by-step explanation:

Well, divide 300 by 100, which gets you 3. So 3 feet of book shelves = 1%

So 3x18=54

Answer:

78 for high and 48 for low, where i live

Step-by-step explanation:

you didnt give a graph or whatever so i put two random answers that arent actually where i live because that doesn't matter and is personal info.

Answer:

5y + 4

Step-by-step explanation:

-4y + 7 + 9y - 3

Subtract: 9y - 4y

5y + 7 - 3

Subtract: 7 - 3

5y + 4

Hope this helps and pls do mark me brainliest if you can:)

Answer:

3 2/3

Step-by-step explanation:

divide the 3 by 11 and your product is the whole number, with the remainder being the numerator.

11 / 3 = 9.2

9/3=3

3 2/3

Answer:

14

Step-by-step explanation:

PEMDAS:

P: Parentheses

E: Exponents

M: Multiplication

D: Division

A: Addition

S: Subtraction

Step 1:

7 ( 6 - 4 )      Equation

Step 2:

7 ( 2 )     Subtract

Answer:

14

Hope This Helps :)

Step-by-step explanation:

(5×10)(9×107)

=48150

=4.82 ×10^4?

I'm not sure^^

Answer:

p1: y-100=1.6(x-25)

p2 y=1.6x+60

p3 slope; 1.60

p4 y intercept, slope intercept form, easier to fine using slope intercept

Step-by-step explanation:

this was for savvas 2.2 practice

The required point slope of the equation is y-100=1.6(x-25) and the slope-intercept equation y = 1.6x + 60 and the slope represents the cost per invitation.

Given that,  
The total price of a printing job at Incredible Invites includes the cost per invitation plus a one-time set-up fee. Write equations in point-slope and slope-intercept forms to model the situation. What part of the equations represents the cost per invitation is to be determined.

The slope of the line is a tangent angle made by line with horizontal. i.e. m =tanx where x in degrees.

Here,
Let the number of invitations be x, and the total cost be y.
Slope-point form of the equation is given by,
(y - y₁) = (y₂ - y₁)/ (x₂ - x₁ ) (x - x₁)
substitute value in the equation,
y - 100 = (140 - 100)/ (50 - 25)(x - 25)
y - 100 = 40 / 25 (x - 25)
y - 100 = 1.6 (x - 25)  - - - - - - (point-slope form)
y = 1.6x - 25 * 1.6 + 100
y = 1.6x - 40 + 100
y = 1.6x + 60 - - - - - (slope-intercept form)
Slope = 1.6

Thus, the required point slope of the equation is y-100=1.6(x-25), and the slope-intercept equation y = 1.6x + 60, and the slope represents the cost per invitation.

Learn more about slopes here:
https://brainly.com/question/3605446

#SPJ2

Answer:

C.

Step-by-step explanation:

Answer:

62

Step-by-step explanation:

62

Answer:

hope this helps

Step-by-step explanation:

Answer:

A. c. F.

Step-by-step explanation:

Unfortunately sucrose isn't classified as any of the above because it is not alive. Sucrose can however be classified as a disaccharide because it contains two monosaccharides (glucose and fructose). If you want to be more broad you can classify it as a carbohydrate.

This is rounded to the nearest 1/8

2 1/2 ounce package active dry yeast

2 1/2 cup warm water

7 1/2 tablespoons molasses

2 1/2 cup powdered milk

2 1/2 egg yolk, beaten

2 1/2 egg white, beaten

7 1/2 cups bread flour, divided

15 tablespoons butter, melted and divided

2 1/2 teaspoon salt

2 1/2 cup whole wheat flour

2 1/2 cup granulated sugar

2 1/2 tablespoon ground cinnamon

2 1/2 cup raisins

2 1/2 large egg, beaten

2 1/2 cup water

Step-by-step explanation:

Divide each ingredient by 12, then multiply by 30 to get your answers.

Answer:

80

Step-by-step explanation:

Let h = number of rooms in the hotel

45% * h = 36

.45 h = 36

Divide by .45

.45h/.45 = 36/.45

h =80

There are 80 rooms in the hotel

Answer:

80 rooms

Step-by-step explanation:

Step 1:

45/100 = 36/x       Equation

Step 2:

45x = 3600      Multiply

Step 3:

x = 3600 ÷ 45     Divide

Answer:

x = 80

Hope This Helps :)