Use the given value of sin theta to find the approximate value of cos theta in the quadrant indicated.
sin theta = -0.906, 3pi/2 < theta < 2π

The solution of the equation are

An equation is a mathematical statement that is made up of two expressions connected by an equal sign.

Given:

9x -2 y =-8

By graph we can see that the solution for the graph is

(0, 4)

(1, 8.5)

(-0.66, 1)

(-0.44, 2)

Learn more about graph here:

https://brainly.com/question/14375099

#SPJ1

Graph B is the graph that describes the function.

A quadratic graph is a graph of quadratic functions which have the power of the variable as 2. They are usually u-curved or inverted v-curved.

Analysis:

if we solve the quadratic function, y = [tex]x^{2}[/tex] -4x -12

when the curve touches the x-axis y = 0

[tex]x^{2}[/tex] -4x -12 = 0

[tex]x^{2}[/tex]  -6x +2x -12 = 0

x(x-6) +2(x-6)

(x+2)(x-6) = 0

x = -2 or 6

From the graph, The second graph(graph B) shows the points on the x-axis x = -2 and x = 6.

Learn more about Quadratic graphs : brainly.com/question/25841119

#SPJ1

Using conditional probability, the probability that a randomly selected band member is in the brass section and plays trombone is:

D. 0.12

Conditional probability is the probability of one event happening, considering a previous event. The formula is:

[tex]P(B|A) = \frac{P(A \cap B)}{P(A)}[/tex]

In which:

For this problem, the events are:

Hence the parameters are:

P(A) = 0.5, P(B|A) = 0.24.

The probability of both events is found as follows:

[tex]P(B|A) = \frac{P(A \cap B)}{P(A)}[/tex]

[tex]P(A \cap B) = P(B|A)P(A) = 0.24 \times 0.5 = 0.12[/tex]

Hence option D is correct.

More can be learned about conditional probability at https://brainly.com/question/24372153

#SPJ1

Answer:

0.12

Step-by-step explanation:

just took it :)

Answer:

[tex] \dfrac{2\sqrt{a}}{a} [/tex]

Step-by-step explanation:

[tex] 2a^{-\frac{1}{2}} = [/tex]

[tex]= 2 \times \dfrac{1}{\sqrt{a}}[/tex]

[tex]= 2 \times \dfrac{1}{\sqrt{a}} \times \dfrac{\sqrt{a}}{\sqrt{a}}[/tex]

[tex] = \dfrac{2\sqrt{a}}{a} [/tex]

Decompose the terms in the sum as

[tex]4 + 15 + 26 + \cdots + 213 = 4 + (4 + 11) + (4 + 2\times11) + \cdots + (4 + 19\times11)[/tex]

so there are 20 terms in the sum. Then our sum simplifies to

[tex]4 + 15 + 26 + \cdots + 213 = 4\times20 + (0+1+2+\cdots+19)\times11[/tex]

Now, if

[tex]S = 1 + 2 + 3 + \cdots + 17 + 18 + 19[/tex]

we can reverse the order of terms to get the same sum,

[tex]S = 19 + 18 + 17 + \cdots + 3 + 2 + 1[/tex]

so that doubling up the sum gives

[tex]2S = (1 + 19) + (2 + 18) + \cdots + (18 + 2) + (19 + 1) = 19\times20 \implies S=19\times10=190[/tex]

So, our sum evaluates to

[tex]4 + 15 + 26 + \cdots + 213 = 4\times20 + 190\times11 = \boxed{2170}[/tex]

Step-by-step explanation:

23 by 13 is the answer cause 23 i s23

The statements that are true of the given function f(x) = 1/2x + 3/2 are:

f(0) = 3/2

f(2) = 7/2

f(4) = 7/2

We have,

Let's evaluate the given function f(x) = 1/2x + 3/2 for the given values of x and check which statements are true:

f(-1/2) = 1/2 * (-1/2) + 3/2 = -1/4 + 3/2 = (6 - 1)/4 = 5/4 = 1.25

Statement: f(-1/2) ≠ 2 (False)

f(0) = 1/2 * 0 + 3/2 = 0 + 3/2 = 3/2

Statement: f(0) = 3/2 (True)

f(1) = 1/2 * 1 + 3/2 = 1/2 + 3/2 = 4/2 = 2

Statement: f(1) ≠ -1 (False)

f(2) = 1/2 * 2 + 3/2 = 1 + 3/2 = 2 + 3/2 = 4/2 + 3/2 = 7/2

Statement: f(2) = 7/2 (True)

f(4) = 1/2 * 4 + 3/2 = 2 + 3/2 = 4/2 + 3/2 = 7/2

Statement: f(4) = 7/2 (True)

Therefore,

The statements that are true of the given function f(x) = 1/2x + 3/2 are:

f(0) = 3/2

f(2) = 7/2

f(4) = 7/2

Learn more about functions here:

https://brainly.com/question/28533782

#SPJ7

The equation of the circle would be (x - 1)² + (y - 3)² = 65.

The equation of a circle with center (h,k) and radius, r in center radius form is given;  

(x - h)² + (y - k)² = r²

The coordinates of the center of the circle can be calculated by the formula

((x₁ + x₂)/2, (y₁ + y₂)/2).

The point (x₁,y₁) = (9, 2) and (x₂,y₂) = (-7, 4).

So, ((9 -7)/2, (4 + 2)/2) = (1, 3).

Now, r² = (x₂ - x₁)² + (y₂ - y₁)².

Let (x₁, y₁) = (1, 3) and (x₂, y₂) = (-7, 4).

So, r² = (-7 -1)² + (4 - 3)²

= -8² + 1² = 64 + 1 = 65.

With center (h,k) = (1, 3) and r² = 65, we have

Thus, the equation would be (x - 1)² + (y - 3)² = 65.

Learn more about the equation of circle;

https://brainly.com/question/14786372

#SPJ1

Hello,

look at the picture

The values of x in 2cos(2x) = 11cos(x) + 1 are x = 1.82 and x = 4.46

The equation is given as:

2cos(2x) = 11cos(x) + 1

Expand cos(2x)

2(cos²(x) - sin²(x)) = 11cos(x) + 1

sin²(x) = 1 - cos²(x)

So, we have:

2(cos²(x) - 1 + cos²(x)) = 11cos(x) + 1

Evaluate the like terms

2(2cos²(x) - 1) = 11cos(x) + 1

Expand

4cos²(x) - 2 = 11cos(x) + 1

Rewrite as:

4cos²(x) - 11cos(x)  - 2 - 1 = 0

4cos²(x) - 11cos(x)  - 3 = 0

Let cos(x) = y.

So, we have

4y² - 11y - 3 = 0

Expand

4y² + y - 12y - 3 = 0

Factorize

y(4y + 1) - 3(4y + 1) = 0

Factor out 4y + 1

(y - 3)(4y + 1) = 0

Solve for y

y = 3 or 4y = -1

This gives

y = 3 or y = -1/4

Recall that y = cos(x)

So, we have:

cos(x) = 3 or cos(x) = -1/4

The cosine of x is always between -1 and 1 (inclusive).

So, we have:

cos(x) = -1/4

Take the arc cos

[tex]x =\cos^{-1}(-1/4)[/tex]

Evaluate the arccos (in radians)

x = 1.82 and x = 4.46

Hence, the values of x in 2cos(2x) = 11cos(x) + 1 are x = 1.82 and x = 4.46

Read more about cosine functions at:

https://brainly.com/question/17954123

#SPJ1

Answer:

21 because -1/4a - 4 is 22

Answer:

1: [tex]y=-1x-3[/tex]

2: [tex]y=0.8x+4.2[/tex]

3: [tex]y=2x-3[/tex]

Step-by-step explanation:

Question 1: When lines are parallel, that means they're slope is the same and there y-intercept is different. So the first step is to calculate the slope of BC. If you look at BC you'll notice it goes down by 2 and goes forward by 2 so the slope is -2/2 or -1. This completes one part of the slope-intercept form which is y=mx+b where m is the slope and b is the y-intercept. The y-intercept will be calculated using the point A. since the equation passes through point A

-1 = (-2)(-1) + b

-1 = 2 + b

-3 = b

y=-1x-3

Question 2: Same concept here, if you look at AC, you'll see it "rises" by 4 and "runs" by 5, thus the slope is 4/5. Since it passes through B we'll use that to find the y-intercept

5 = (4/5)(1) + b

5 = 4/5 + b

b = 4.2

Question 3: It "rises" by 6 and "runs" by 3, thus the slope is 6/3 which is 2.

Plug in known values

3=(3)(2) + b

3 = 6 + b

-3 = b

Each child will receive 0.125 (or 12.5%) of the estate.

If the surviving spouse gets one half of the estate, the other half has to be divided among the four surviving children.

A fraction represents a part of a whole or, more generally, any number of equal parts. When spoken in everyday English, a fraction describes how many parts of a certain size there are, for example, one-half, eight-fifths, three-quarters.

So it's 0,5 divided among the 4 surviving children.

That is 0.125 or 12.5% of the estate.

Each child will receive 0.125 of the estate. a

To learn more about the fraction visit:

https://brainly.com/question/78672

#SPJ1

The Empirical Rule is also referred to as the 68-95-99.7 rule and it can be defined as a statistical rule which states that:

By applying the empirical rule to the data contained in the histogram, we can logically deduce the following points:

Read more on Empirical Rule here: https://brainly.com/question/10093236

#SPJ1

The value of her investment at the end of 3 years is £10955.08

The given parameters are

The value is then calculated as:

Value = P * P(1 + r)^t

So, we have:

Value = 5000 + 5000 * (1 + 6%)^3

Evaluate the expression

Value = 10955.08

Hence, the value of her investment at the end of 3 years is £10955.08

Read more about compound interest at:

brainly.com/question/24924853

#SPJ1

Answer:

see below

Step-by-step explanation:

D miles / M miles per gallon  = gallons used

Answer:

27.03 or 27 3/100

Step-by-step explanation:

Plug in numbers

The solution to the fraction expression at x = 1¹/₁₀ is: 10.97

The fraction expression is given as:

3(5 - ¹/₆x) + ¹/₈(32 + 6x) + 7.3x - 5 * 0.05x

Breaking this down gives us:

15 - ¹/₂x + 4 + ³/₄x + 7.3x - 0.25x

= 19 - 7.3x

Now, we want to plug in 1¹/₁₀ for x.

1¹/₁₀ can be expressed as ¹¹/₁₀ and as such:

19 - 7.3(¹¹/₁₀) = 10.97

Read more about fraction at: https://brainly.com/question/30154928

#SPJ2

Answer:

Step-by-step explanation:

pounds to ounces: 16 ounces in a pound a trick to know is if you look at the pound symbol lb it looks like 16 in a way so 16*3= 48 48 is your answer

The average speed for the entire journey will be 53.333 miles per hour.

The average speed is the ratio of the total distance traveled to the total time taken by the body. Its unit is m/sec.

The distance from the Springfield, MA, to Boston is, L

v₁ is the velocity during traveling from Boston to Springfield, MA

v₂ is the  velocity during traveling from Springfield, MA to Boston

t₁ is the time needed to travel from Boston to Springfield, MA

t₂ is the time needed to travel from Springfield, MA to Boston

t is the total time period of the journey

v is the average speed

From the formula of distance;

Distance = speed × time

The speed of train for the going from Springfield, MA, to Boston is 40 mph. The time period is calculated as;

L = v₁ × t₁

t₁ = L/v₁

t₁ = L/40

The speed of train for the going from Boston to Springfield, MA, is 80 mph. The time period is calculated as;

L = v₂ × t₂

t₂ = L/v₂

t₂ = L/80

The total time is taken;

t = t₁ + t₂

t =  (L/40)+( L/80)

t=3L/80

The ratio of total distance traveled to the total time spent by the body is known as average speed, calculated as;

Average speed = Total distance / Total time

v = 2L / (3L/80)

v= (2L × 80)/3L

v = 160 / 3

v = 53.333 miles per hour.

Hence the average speed for the entire journey will be 53.333 miles per hour.

To learn more about the average speed, refer to the link;

https://brainly.com/question/12322912

#SPJ1

1. The equation of the parallel line is y = -x - 1.

2. The equation of the perpendicular line is y = 3/2x - 4.

Lines that are parallel have the same slope while slope values for perpendicular lines are negative reciprocals.

1. The slope (m) of y = -x + 1 is -1. Substitute m = -1 and (x, y) = (4, -5) into y = mx + b:

-5 = -1(4) + b

-5 = -4 + b

-5 + 4 = b

b = -1

Substitute b = -1 and m = -1 into y = mx + b

y = -x - 1

2. The slope (m) of y = -2/3x + 5 is -2/3.

Negative reciprocal of -2/3 is 3/2.

Substitute m = 3/2 and (x, y) = (2, -1) into y = mx + b:

-1 = 3/2(2) + b

-1 = 3 + b

-1 - 3 = b

b = -4

Substitute b = -4 and m = 3/2 into y = mx + b

y = 3/2x - 4

Learn more about linear equation on:

https://brainly.com/question/14323743

#SPJ1

Answer:

D. 1.37, -1.37

Step-by-step explanation:

9x² = 17

x² = (17 / 9)

x = ± √(17 / 9)

x = ± (√17) / 3

x = 1.37, - 1.37

Answer:

v = 34 in

Step-by-step explanation:

triangle BIG is similar to triangle MOP

This means that the length of their corresponding sides

are proportional.

Then

[tex]\frac{v}{51} =\frac{60}{90}[/tex]

Then

90v = 51 × 60

then

90v = 3060

Then

v = 3060/90

Then

v = 34

Answer:

3 seconds for the ball to hit the ground.

Step-by-step explanation:

To calculate how long it will take for an object to drop(with no force of velocity), use [tex]-16t^{2}[/tex] and 144 will be our initial height, so we use the equation:

[tex]f(x) = -16t^{2} + 144[/tex]

Now, lets simplify this equation. We have a GCF (greatest common factor) of -16, which goes into 144, 9 times. Your simplified equation will look like this.

[tex]f(x) = -16(t^{2} - 9)[/tex]

When we have two squares in a group of parentheses, we must simplify that. Therefore, we use the sum and difference pattern. The sum and difference pattern requires a -3 and 3, because two positives and/or two negatives would not result in a -9, so we must use one positive, and one negative. Therefore, we keep the GCF of -16, simplify [tex]t^{2} -9[/tex], to get a final equation of:

[tex]f(x) = -16(t-3)(t+3)[/tex]

Now, we solve for t to see how long it will take for the ball to reach the ground with no added velocity.

[tex]t=-3,3[/tex]

Time can never be negative, when we are talking about a present-time situation. Therefore, we can not have -3 as an answer, and we have 3 as a final answer. It will take 3 seconds for the ball to reach the ground.

The system of equations shown in this graph of a system of linear equations are:

In order to determine the required system of equations from this graph of a system of linear equations, we would find the slope of each line as follows:

[tex]Slope = \frac{Change\;in\;y\;axis}{Change\;in\;x\;axis}\\\\Slope = \frac{y_2\;-\;y_1}{x_2\;-\;x_1}[/tex]

For line 1, we have:

Points (x, y) = (0, 0) and (3, -2)

Slope = (-2 - 0)/(3 - 0)

Slope = -2/3.

Therefore, y = mx + c  ⇒ y = -2/3x + 0.

For line 2, we have:

Points (x, y) = (0, -5) and (4, -2)

Slope = (-2 - (-5))/(4 - 0)

Slope = (-2 + 5)/(4 - 0)

Slope = 3/4.

Therefore, y = mx + c  ⇒ y = 3/4x - 5.

Read more on slope here: brainly.com/question/3493733

#SPJ1

Answer:

O.B y = − 2/3x

      y = 3/4x − 5

Step-by-step explanation:

You will need 292.5 mL of the 10% solution and 2925 mL of pure alcohol.

The analysis of mathematical representations is algebra, and the handling of those symbols is logic.

You require 450 mL of a 65% alcohol solution.

On hand, you have a 10% alcohol mixture.

Then the amount of the 10% alcohol mixture and pure alcohol that you need to obtain the desired solution will be

Let x be the amount of the 10% of alcohol is needed.

Then the equation will be

⇒ 450 · 0.65

⇒ 292.5 mL pure alcohol

Then the alcohol mixture will be

0.1x = 292.5

    x = 2925 mL of alcohol mixture

You will need 292.5 mL of the 10% solution and 2925 mL of pure alcohol.

More about the Algebra link is given below.

https://brainly.com/question/953809

#SPJ1

5 hours of math tutoring must be mixed with 5 hours of arts tutoring to make $45 per hour.

Mr. Robert charges $50 per hour for math tutoring and charges $40 per hour for language arts tutoring.

Let, he mixed x hours of math tutoring to 5 hours of arts tutoring.

Then, Income from x hours of math tutoring = $50x

Income from 5 hours of arts tutoring = 5×$40 = $200

Total mixed income in (x+5) hours = $(50x+200)

According to the question, in mixed process he make $45 per hour. So, for (x+5)hours he earns $(x+5)45

So, The equation becomes,

50x+200 = (x+5)45

⇒ 50x+200 = 45x+225

⇒ 50x-45x = 225-200

⇒ 5x = 25

⇒ x = 25/5

⇒ x = 5

So, 5 hours of math tutoring must be mixed.

Learn more about equation here :

https://brainly.com/question/11242211

#SPJ10

From the first two inference, it takes her phone 1 minute to charge 2% i.e 1 minute of charge = 2% of battery.

Therefore; charging from scratch,

1 min = 2%

x mins = 50%.

using cross multiplication,

x mins = (50% × 1 min) ÷ 2%.

x = 25 mins.

For 90%, applying the same formula,

y min = (90% × 1 min) ÷ 2%

y = 45 mins.

So from zero percent, it will take Dana's phone 25 minutes to charge to 50% and 45 minutes to charge to 90%.

Answer: A. (2, 5), (3, 6), (6,9)

Step-by-step explanation:

Each value of x maps onto only one value of y.

Sam run for total 6.08 miles.

Sam run 3 1/4 miles on Tuesday and then ran 2 5/6 miles on Wednesday.

Fraction is ratio of integers. example- 7/8.

Sam run [tex]3\frac{1}{4}[/tex] miles on Tuesday.
on [tex]2\frac{5}{6}[/tex] on Wednesday
Total run =Run on tuesday + Run on wednesday

Total run = [tex](3\frac{1}{4} )+(2\frac{5}{6} )[/tex]

= 13/4 + 17/6

Total run = 6.08

Thus Sam run for total 6.08 miles

Learn more about fraction here:
https://brainly.com/question/10354322

#SPJ1

Answer: (-9, -3)

Step-by-step explanation:

A = (-3, -1)

A' = (-3, -1)*3 = (-9, -3)

To complete the conversion, the following will be gotten:

12880 m

Using conversion technique,

8 mi / 1 × 1.61 k / 1 mi × 1000m / 1k

we have to cancel out similar units in the numerator and denominator.

Therefore,

8 mi / 1 × 1.61 k / 1 mi × 1000m / 1k

8 / 1 × 1.61  / 1  × 1000m / 1 = 12.88 / 1 × 1000m

Hence,

12.88 / 1 × 1000m = 12880 m

learn more on conversion here: https://brainly.com/question/16887207

#SPJ1