If I'm right, none of answer choices are correct. I used substitution and factoring, but couldn't find a solution. I just want anyone's conformation. Thanks!

[tex]4[sin(x)]^2 - 2 = 0\implies 4[sin(x)]^2=2\implies [sin(x)]^2=\cfrac{2}{4}\implies [sin(x)]^2=\cfrac{1}{2} \\\\\\ sin(x)=\pm\sqrt{\cfrac{1}{2}}\implies sin^{-1}[sin(x)]=sin^{-1}\left( \pm\sqrt{\cfrac{1}{2}} \right)\implies x=sin^{-1}\left( \pm\sqrt{\cfrac{1}{2}} \right)[/tex]

[tex]x=sin^{-1}\left( \pm\cfrac{\sqrt{1}}{\sqrt{2}} \right)\implies x=sin^{-1}\left( \pm\cfrac{1}{\sqrt{2}} \right)\implies x=sin^{-1}\left( \pm\cfrac{\sqrt{2}}{2} \right) \\\\[-0.35em] ~\dotfill\\\\ ~\hfill x=\cfrac{\pi }{4}~~,~~\cfrac{3\pi }{4}~~,~~\cfrac{5\pi }{4}~~,~~\cfrac{7\pi }{4}~\hfill[/tex]

Check the picture below.

Answer:

8

Step-by-step explanation:

Answer:

the answer is 8

PLEASE GIVE BRAINLIST

Answer: y= -1/20x + 38/5

or

y= -1/20x + 7.6

Step-by-step explanation:

y-y1 = m(x-x1)

m = 8-7 / -8 - 12 = 1/-20 = -1/20

y-8 = -1/20(x+8)

y=-1/20x - 8/20 + 160/20

y= -1/20x + 38/5

or

y= -1/20x + 7.6

Answer:

A = 160 in²

Step-by-step explanation:

Split this up into 3 rectangles and find the area of each (A = bh). Then add up all the areas to get the total area of the figure.

Rectangle A

A = 10 x 7

A = 70 in²

Rectangle B

A = 11 x 6

A = 66 in²
Rectangle C

A = 4 x 6

A = 24 in²

Total Area

A = 70 + 66 + 24

A = 160 in²

Hope this helps and God bless!

Answer:

160

Step-by-step explanation:

Do (6x4)+(6x18)+(7x4)

You don't need to put the parentheses but it makes it look better and make it easier to understand.

you can just split the figure in 2 separate figures and them add the areas:

area rec. 1:

3m×3m= 9m²

area rec. 2:

3m× (2m+3m)

= 3m×5m

=15m²

total area:

9m²+15m²= 24m²

Answer:

Area = 24

Step-by-step explanation:

Work and explanation ~

Answer:

1+2-3+4-5+6-7+8-9=3-3+4-5+6-7+8-9=-1+6-7+8-9=5-7+8-9=6-9=-3

Step-by-step explanation:

Answer: 45

Step-by-step explanation: Add all the digits

Answer:

B

Step-by-step explanation:

hope it helps <3333

You look beautiful

Answer:

the answerr is 4

Step-by-step explanation:

please mark me the brainiest

Answer:

it's d

Step-by-step explanation:

because you first do 3*4 =12 twice because there are two sides, and do 10*3 twice, and 10*4 twice, and add it all up.

so,

24+60+80=164

answer is d.

Answer:

Option D, [tex]164\ units^2[/tex]

Step-by-step explanation:

Step 1:  Determine the area of the front and back

[tex]A = l * w[/tex]

[tex]A = 10\ units * 4\ units[/tex]

[tex]A = 40\ units^2[/tex]

Step 2:  Determine the area of the sides

[tex]A = l * w[/tex]

[tex]A = 3\ units * 4\ units[/tex]

[tex]A = 12\ units^2[/tex]

Step 3:  Determine the area of the top and bottom

[tex]A = l * w[/tex]

[tex]A = 10\ units * 3\ units[/tex]

[tex]A = 30\ units^2[/tex]

Step 4:  Determine the total surface area

[tex]SA = 2(40\ units^2) + 2( 12\ units^2) + 2(30\ units^2)[/tex]

[tex]SA = 80\ units^2 + 24\ units^2 + 60\ units^2[/tex]

[tex]SA = 164\ units^2[/tex]

Answer:  Option D, [tex]164\ units^2[/tex]

Answer:

The answer would be to shade 2 parts as 10 percent of 20 is 2.Hope this helps!

Step-by-step explanation:

Answer:

Step-by-step explanation:

Answer:

B. 73.7%

Step-by-step explanation:

Usa Tesprep explained

Answer:

2x - 6y

Step-by-step explanation:

Combine like terms

(x) - 7y + (x) + y

2x - 7y + y

Combine like terms again

2x - (7y) + (y)

2x - 6y

Hope this helps!

Answer:

slope = -6/7

all steps in picture :)

The rectangular prism with dimensions x units, 2x units, and x- 8 units has a surface area of 10x^2 - 48x square units

The formula for calculating the suface area of rectangular prism is expressed as:

A =2()

lw + wh + lh

where:

Given the following parameters

l = x units

w = 2x units

h = x -  8 units

Substitute

S = 2(2x^2 + x^2 - 8x + 2x^2 - 16x)

S = 2(5x^2-24x)

S= 10x^2 - 48x square units

Hence the rectangular prism with dimensions x units, 2x units, and x- 8 units has a surface area of 10x^2 - 48x square units

Learn more on surface area here:https://brainly.com/question/76387

Answer:

C

Step-by-step explanation:

10x^2+48x

Answer:

6 days

Step-by-step explanation:

1/T1 + 1/T2 = 1/TotalTime

Builder one is 1/15

Builder two is 1/10.

Answer:

106.25

Step-by-step explanation:

99.5+113= 212.5 /2 = 106.25

Answer:

Populaiton

Step-by-step explanation:

Surveying the population will give a more accurate data set as the sample size could be biased based on the characteristics of specific players.

Answer:

136

Step-by-step explanation:

5*7 = 35

5*7 = 35

4*6/2 = 12

4*6/2 = 12

7*6 = 42

Add them all up

Answer:

4. two real solutions

Step-by-step explanation:

[tex]x^2 - x = 1[/tex] (Given)

[tex]\implies x^2-x-1=0[/tex]

[tex]b^2-4ac\\=(-1)^2-4(1)(-1)\\=1+1=2>0\\\implies b^2-4ac >0[/tex]

-> Given quadratic equation has two real solutions.

To answer this, we substitute 12 ft to the f(h) in the given equation,   
f(h) = -8t² + 8t + 12 = 12

Subtracting 12 from both sides of the equation will give us an answer of,

-8t² + 8t = 0

Then, we transpose 8 to the other side and divide the equation by -8 and t, we get an answer of t = 1 second. 

Answer:

Below in bold.

Step-by-step explanation:

When he lands h = 0  so

-8t^2 + 8t + 12 = 0

Solving for t

t = [-8 +/- sqrt(8^2 - 3*-6*12)] / -16

t = 1.82 seconds.

e.g for 15:

a = 3, b is missing, c = 10

A is missing, B is ?, C is 90

after 21 days, the answer is 26
hope this helps

Answer:

In linear algebra, a coefficient matrix is a matrix consisting of the coefficients of the variables in a set of linear equations.

Step-by-step explanation:

the matrix is used in solving systems of linear equations

Answer:

about 6 hours

Step-by-step explanation:

[tex]8( {7}^{x} ) = 2( {10}^{6} )[/tex]

[tex] {7}^{x} = 250000[/tex]

[tex]x = \frac{ ln(250000) }{ ln(7) } = 6.39[/tex]

The about 6 hours the bacteria population to reach 2 million.

An exponential equation is an equation with exponents where the exponent (or) a part of the exponent is a variable.

Given that the experiment requires the population of the bacteria to reach 2 million before the experiment can begin.

The reproduction rate of the bacteria can be modeled by the exponential equation,

y = 8 × 7ˣ.

So, according to the question,

8 × 7ˣ = 2 × 10⁶

7ˣ = 250000

x ≈ 6.4

Hence the about 6 hours the bacteria population to reach 2 million.

Learn more about exponential equation click;

https://brainly.com/question/29113858

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Answer:

A = 8

B = -4

Step-by-step explanation:

Answer:

O Connect the endpoint and the mark at the angle measure

Step-by-step explanation:

Check the illustration for more details.

Step-by-step explanation:

AB and CD is not parallel because co-interior sum is 180 and another reason is that parallel sign isn't given.