Answer:
A
Step-by-step explanation:
just go to calculator and solve the equation. cos(3times10degrees-180degrees). you wil get the correct answer of -squareroot3/2.
The values of x that represent the solutions to the equation \(cos(3x-180)=-\frac{\sqrt{3} }{2}\) are 10°, 110°, 130°
What is an equation?"It is a mathematical statement which consists of equal symbol between two algebraic expressions."
What is the formula for cos(A - B)?\(cos(A-B)=cos(A)cos(B)+sin(A)sin(B)\)
For given question,
We have been given an equation \(cos(3x-180)=-\frac{\sqrt{3} }{2}\)
Using the formula of cos(A- B),
\(\Rightarrow cos(3x-180)=-\frac{\sqrt{3} }{2}\\\\\Rightarrow cos(3x)cos(180)+sin(3x)sin(180)=-\frac{\sqrt{3} }{2}\\\\\Rightarrow cos(3x)\times (-1)+sin(3x)\times 0=-\frac{\sqrt{3} }{2}\\\\\Rightarrow -cos(3x)+0=-\frac{\sqrt{3} }{2}\\\\\ \Rightarrow -cos(3x)=-\frac{\sqrt{3} }{2}\\\\\Rightarrow cos(3x)=\frac{\sqrt{3} }{2}\)
We know, \(cos(\frac{\pi}{6} )=\frac{\sqrt{3} }{2}\)
\(\Rightarrow cos(3x)=\frac{\sqrt{3} }{2}\\\\\Rightarrow cos(3x)=cos(\frac{\pi}{6} )\\\\\Rightarrow 3x=\frac{\pi}{6}~~~or~~~3x=\frac{\pi}{6}+ 2\pi\)
Case 1:
\(\Rightarrow 3x=\frac{\pi}{6}\\\\\Rightarrow x=\frac{\pi}{18}\\\\\Rightarrow x=10^{\circ}\)
Case 2:
\(\Rightarrow 3x=\frac{\pi}{6}+2\pi\\\\\Rightarrow 3x=30^{\circ}+360^{\circ}\\\\\Rightarrow x=130^{\circ}\)
Since 0 ≤ x < 180°, so we have two values of x.
x = 10° and 130°
Also, for x = 110°,
cos(3(110°) - 180°)
= cos (330° - 180°)
= cos (150°)
= cos(180° - 30°)
= - cos(30°)
= \(-\frac{\sqrt{3} }{2}\)
Therefore, the values of x that represent the solutions to the equation \(cos(3x-180)=-\frac{\sqrt{3} }{2}\) are 10°, 110°, 130°
Learn more about cos(A - B) here:
https://brainly.com/question/13094664
#SPJ3
PLEASE PLEASE PLEAAAASE HELP! I NEED TO TURN IT IN RIGHT NOW! PRETTY PLEEEASE
Answer:
5,000,000
Step-by-step explanation:
10 x 10 x 10 x 10 x 10 x 10 = 1,000,000
1,000,000 x 5 = 5,000,000
Answer:
5 Mg
Step-by-step explanation:
The metric prefix associated with \(10^{6}\) is Mega (M).
This can be written as 5 Mg.
plsssssssss help plssssssssssssssssssssssssssssssssssssssssssssssssss Find the area of the triangle you only know base and side in both a 3 3/4 1 1/3
B 1 3/5 3 7/16 will give 100 points
Answer:A=hbb
2
Step-by-step explanation:
If the sides of a triangle are given along with an included angle, the area of the triangle can be calculated with the formula, Area = (ab × sin C)/2, where 'a' and 'b' are the two given sides and C is the included angle. This is also known as the "side angle side " method.
Please help. Here's the question
help please finding the third side
Answer:
as it is a right angled triangle
we can find its 3rd side with the help of hypotenuse formula.
according to it
h² = a² + b²
here,
h = hypotenuse i.e. longest side of a right angled triangle
a = side
b = base
now,
a/q we have to find h (or hypotenuse) of the right angled triangle
h² = (12)² + (5)²
h = 144 + 25
h = 169
h² = √169 = 13
therefore, 3Rd side of the triangle is 13.
is most right answer
Step-by-step explanation:
Step-by-step explanation:
as it is a right angled triangle
we can find its 3rd side with the help of hypotenuse formula.
according to it
h² = a² + b²
here,
h = hypotenuse i.e. longest side of a right angled triangle
a = side
b = base
now,
a/q we have to find h (or hypotenuse) of the right angled triangle
h² = (12)² + (5)²
h = 144 + 25
h = 169
h² = √169 = 13
therefore, 3Rd side of the triangle is 13.
Hope this answer helps you dear!
• if you have any doubt plz point it out.
In the diagram, the figures are similar. Use proportions to find x.
Answer:
x~11
Step-by-step explanation:
22:17=14:x
22/17=14/x
22x=17*14
22x=238
22x/22=238/22
x=238/22
x=10.818181818181818
x~11
the bayley scales of infant development yield scores on two indices-the psychomotor development index (pdi) and the mental development index (mdi)- which can be used to assess a child's level of functioning in each of these areas at approximately one year of age. among normal healthy infants, both indices have a mean value of 100. as part of a study assessing the development and neurologic status of children who have undergone reparative heart surgery during the first three months of life, the bayley scales were administered to a sample of one-year-old infants born with congenital heart disease
As the test's p-value above the 0.05 level of significance, we cannot reject the hypothesis.
X=97.77 is the mean on the PDI.
a )
The population standard deviation of the PDI:S = 14-69
The PDI sample size is n=70.
The test statistic value is
=X -μ/б-√n
97.77 - 100/14.69√70
Z = - 1.27
The test's p-value is 1.
Value of p = 2p (z - 1.27).
=2 ( = NORMSDIST (-1.27) )
= - 2 (0.1020 )
p-value = 0.2041
Since , the p -value of the test is greater the the 0.05 level of significance, so we fail to reject hypothesis
Learn more about P-value here:
brainly.com/question/14790912
#SPJ4
The solution to a logistic differential equation corresponding to a specific hyena population on a reserve in A western Tunisia is given by P(t)= The initial hyena population 1+ke-0.57 was 40 and the carrying capacity for the hyena population is 200. What is the value of the constant k? (A) 4 (B) 8 (C) 10 (D) 20 6. Which of the following differential equations could model the logistic growth in the graph? AM 50 40 30/ 20 10 t (A) (B) dM =(M-20)(M-50) dt dM = (20-MM-50) dt dM = 35M dt dM = 35M(1000-M) dt (C) (D)
The logistic differential equation for the hyena population is given by:
dP/dt = r * P * (1 - P/K)
where P(t) is the hyena population at time t, r is the growth rate, and K is the carrying capacity.
We are given that:
P(t) = 40 + k * e^(-0.57t)
K = 200
To determine the value of k, we can plug in these values into the logistic differential equation and solve for k:
dP/dt = r * P * (1 - P/K)
dP/dt = r * P * (1 - P/200)
dP/dt = r/200 * (200P - P^2)
dP/(200P - P^2) = r dt
Integrating both sides, we get:
-1/200 ln|200P - P^2| = rt + C
where C is a constant of integration.
Using the initial condition P(0) = 40 + k, we can solve for C:
-1/200 ln|200(40+k)-(40+k)^2| = 0 + C
C = -1/200 ln|8000-480k|
Plugging in this value of C and simplifying, we get:
-1/200 ln|200P - P^2| = rt - 1/200 ln|8000-480k|
ln|200P - P^2| = -200rt + ln|8000-480k|
|200P - P^2| = e^(-200rt) * |8000-480k|
200P - P^2 = ± e^(-200rt) * (8000-480k)
Since the population is increasing, we choose the positive sign:
200P - P^2 = e^(-200rt) * (8000-480k)
Using the initial condition P(0) = 40 + k, we get:
200(40+k) - (40+k)^2 = (8000-480k)
8000 + 160k - 2400 - 80k - k^2 = 8000 - 480k
k^2 + 560k - 2400 = 0
(k + 60)(k - 40) = 0
Thus, k = -60 or k = 40. Since k represents a growth rate, it should be positive, so we choose k = 40. Therefore, the value of the constant k is option (A) 4.
For the second part of the question, the logistic equation that could model the growth in the graph is option (B) dM/dt = (20-M)*(M-50). This is because the carrying capacity is between 20 and 50, and the population growth rate is zero at both of these values (i.e. the population does not increase or decrease when it is at the carrying capacity).
Learn more about equation from
https://brainly.com/question/17145398
#SPJ11
Subtract the linear expressions.
(3/4x−1)−(1/3x+4)
What is the difference?
Enter your answer in the box. Enter fractions as simplified fractions.
Answer:
5-60x
12x
Step-by-step explanation:
= 3/4x-1 - 1/3x-4
= 3/4x - 5 - 1/3x
= 9-60x-4
12x
= 5 - 60x
12x
"Gustavo applied the distributive property to the expression 9(w+5). He then used the commutative property.
Drag and drop expressions to the boxes to correctly complete the statements.
After applying the distributive property, Gustavo's expression was _________.
After he used the commutative property, his expression was _________.
help
Answer:
Drag and drop expressions to the boxes to correctly complete the statements.
After applying the distributive property, Gustavo's expression was 9w + 45.
After he used the commutative property, his expression was 45 + 9w.
---------------------
I think this is correct hope this helps
The angle of elevation of a cliff from a fixed point A is theta .After going up a distance of k meters to the top of the cliff at the angle beta, it is found that the angle of elevation is Alpha. show that the height of the cliff in meter is . And sketch
\(k( \cos \beta - \sin \beta \cot \alpha ) \div \cot\theta - \cot \alpha \)
To show the height of the cliff in meters using the given information, let's denote the height of the cliff as h, and the horizontal distance from point A to the base of the cliff as x.
What are the steps?1. Apply the tangent function to angle theta: tan(theta) = h/x.
2. Apply the tangent function to angle alpha: tan(alpha) = (h + k)/x.
3. Solve the first equation for x: x = h/tan(theta).
4. Substitute this expression for x in the second equation: tan(alpha) = (h + k)/(h/tan(theta)).
5. Multiply both sides by h/tan(theta): tan(alpha) * (h/tan(theta)) = h + k.
6. Simplify: h * tan(alpha)/tan(theta) = h + k.
7. Solve for h: h = k * tan(theta)/(tan(alpha) - tan(theta)).
So, the height of the cliff in meters is h = k * tan(theta)/(tan(alpha) - tan(theta)). In the sketch, draw a right triangle with angle theta at point A, the height h, and horizontal distance x.
Then, draw another right triangle with angle alpha at point A, the combined height (h+k), and the same horizontal distance x.
To know more about Elevation visit:
https://brainly.com/question/29477960
#SPJ11
The radius of a circle is 8.5 inches. The circumference of the circle is C inches.
A. 85/c
B. c/17
C. c/8.5
D. 17/c
Interpreting as: circle 8.5 inches.
Assuming
"circle"
is a geometric object
circle | radius 8.5 inches
Equation:
(x - x_0)^2 + (y - y_0)^2 = 72.
(assuming center (x_0, y_0))
Properties:
diameter | 17 inches
area enclosed | 227 in^2 (square inches)
circumference | 53.4 inches
answer is D. 17/C
What is the prime factorization for 127
Answer:
127x1
Step-by-step explanation:
127 is prime, so there are only 2 factors
Four positive whole numbers add up to 96
One of the numbers is a multiple of 19.
The other three numbers are equal.
What are the four numbers?
The four numbers that satisfy the given conditions are 13, 13, 13, and 19.
Let's represent the three equal numbers as x. We know that one of the numbers is a multiple of 19, so we can write it as 19y, where y is a positive whole number.
According to the given information, the four numbers add up to 96:
x + x + x + 19y = 96
Since the three equal numbers are represented as x, we can simplify the equation:
3x + 19y = 96
To find the values of x and y, we need to use trial and error or solve the equation using a systematic approach.
Let's start by trying different values of y and see if we can find a combination that satisfies the equation:
For y = 1:
3x + 19(1) = 96
3x + 19 = 96
3x = 96 - 19
3x = 77
x = 77/3 (not a whole number)
For y = 2:
3x + 19(2) = 96
3x + 38 = 96
3x = 96 - 38
3x = 58
x = 58/3 (not a whole number)
For y = 3:
3x + 19(3) = 96
3x + 57 = 96
3x = 96 - 57
3x = 39
x = 39/3
x = 13
So, one of the numbers is 13, and the other three numbers (since they are equal) are also 13.
Therefore, the four numbers that satisfy the given conditions are 13, 13, 13, and 19.
To know more about numbers, click here: brainly.com/question/86155
#SPJ11
(-10,-7) and (-5,-9)
Answer:
for the first one, go left 10, then down 7, and you have your point. for the second one, go left 5, then down 9, and you have your point.
Step-by-step explanation:
for the x-axis, negative means backwards
for the y-axis, negative means down
i^25
explain please
Answer:
Step-by-step explanation:
1.step. i^25^i
2.step. Rewrite (i^4)6^i=i^4
3.step. Rewrite (i^2)^2
4.step. ((i^2)^2)^6i
5.step. i^2 as -1
6.step. ((-1)^2)^6i
7.step. Raise −1 to the power of 2
i^6i
8.step.One to any power is one.
i1
9.step.Multiply i by 1.
ix1=i
welp pls.i’m so confused
Let's see
Area=Length×Breadth(2x+1)(x-7)=172x(x-7)+1(x-7)=172x²-14x+x-7=172x²-13x-24=0On solving
x=8So
length
2(8)+1=17Width
8-7=1A rectangle has a length of (2x+1) units, a width of (x-7) units and an Area of 17 square units. Find the dimensions of the rectangle.
✭ Explanation -:In this question we are provided with the length of a rectangle (2x + 1) units and the width of the rectangle (x - 7). It is also given that the area is 17 units². We are asked to calculate the length and width of the rectangle.
First we will find the value of x
We know,
\( \bull \: \small\boxed{ \rm{ Area_{(rectangle)} = Length × Width}}\)
Substituting the values we get
\( \small\sf{ (2x + 1 ) (x - 7) = 17}\)
\( \small\rm{ 2x( x - 7) + 1(x - 7) = 17}\)
\( \small\rm{ 2 {x}^{2} - 14x + 1(x - 7) = 17}\)
\( \small\rm{ 2 {x}^{2} - 13x - 7 = 17}\)
\( \small\rm{2 {x}^{2} - 13x - 7 - 17 = 0 } \)
\( \small\rm{2 {x}^{2} - 13x - 24 = 0} \)
\( \small\rm{x = \dfrac{13 + 19}{2 \times 2} } \)
\( \small\rm{ x = \dfrac{32}{4} = 8}\)
\( \small\sf{x = 8} \)
Now we will substitute the value of x
Length = (2x + 1) = 2 × 8 + 1 = 16 + 1 = 17 units
Width = (x - 7) = 8 - 7 = 1 units
Hence, the length of the rectangle is 17 units and the width is 1 units.The leg of an isosceles triangle has a length 2x+4 and the base has length 3x. The
perimeter is 141, What is the length of the base?
Answer:
\(Base = 57\)
Step-by-step explanation:
Given
\(Length = 2x + 4\)
\(Base = 3x\)
\(Perimeter = 141\)
Required
Determine the length of the base
The perimeter of an isosceles triangle is:
\(Perimeter = 2*Length + Base\)
\(141 = 2 (2x + 4) + 3x\)
\(141 = 4x + 8 + 3x\)
Collect Like Terms
\(4x + 3x = 141 - 8\)
\(7x = 133\)
Divide both sides by 7
\(x = 19\)
To get the base, we substitute 19 for x in \(Base = 3x\)
\(Base = 3 * 19\)
\(Base = 57\)
compute the area enclosed by y = e^xy=e x , y = e^{−x}y=e −x , and y = 4.
The area enclosed by the curves can be found by integrating the difference between the upper and lower curves with respect to x within the given x-interval,
which is from -ln(4) to ln(4). To compute the area enclosed by the curves y = e^x, y = e^(-x), and y = 4, we need to find the x-values where these curves intersect.
Setting y = e^x and y = 4 equal to each other, we get:
e^x = 4
Taking the natural logarithm of both sides, we have:
x = ln(4)
Setting y = e^(-x) and y = 4 equal to each other, we get:
e^(-x) = 4
Taking the natural logarithm of both sides, we have:
-x = ln(4)
x = -ln(4)
The area enclosed by the curves can be found by integrating the difference between the upper and lower curves with respect to x within the given x-interval.
∫[ln(4), -ln(4)] (e^x - e^(-x) - 4) dx
Evaluating this integral will give us the area enclosed by the curves.
To know more about area click here
brainly.com/question/13194650
#SPJ11
Could anyone please help me with this? I don't get this
Answer:
23
Step-by-step explanation:
the angles are equal to each other so we use the equation
6x-7=9x-22 and solve for x
step 1 subtract 6 from each side
-7=3x-22
step 2 add 22 to each side
3x=15
step 3 divide each side by 3
x=5
then to find the angle abd we plug in 5 to 9x-22
9x5=45
45-22=23 so angle abd=23
hope this helps (:
if you have any more questions feel free to ask
If the mean height is 180cm and the standard deviation is 4. What percentage of the population would lie between 176cm and 184cm?
A.50%
B.68%
C.95%
D.34%
Standard Deviation: Is a measure of how spread out values are in a data set compared to the mean. It is calculated by finding the square root of the variance, which is the average of the squared differences from the mean.
Mean: The average value of a set of numbers. It is calculated by summing up all the numbers in the set and dividing the result by the total number of numbers in the set.
Distribution Curve: is a bell shaped curve that displays the mean with a line down the center of the curve and standards deviations within standard deviations.
See attached file for model of curve, from: https://commons.wikimedia.org/wiki/File:Standard_deviation_diagram.svg
Given the mean and standard deviation we can use a general rule to determine the population between the given lengths.
Generally in a normal distribution:
68% of the data falls between -1σ and +1σ95% of the data falls between -2σ and +2σ99.75 of the data falls between -3σ and +3σ176 cm is 1 standard deviation less than the mean and 184 cm is 1 standard deviation greater than the mean. Using the general rules above, 68% of data falls between -1σ and +1σ. Therefore, the answer to this question would be B. 68%
What percentage of the global oceans are Marine Protected Areas
(MPA's) ?
a. 3.7% b. 15.2% c. 26.7% d. 90%
Option (c) 26.7% of the global oceans are Marine Protected Areas (MPAs). Marine Protected Areas (MPAs) are designated areas in the oceans that are set aside for conservation and management purposes.
They are intended to protect and preserve marine ecosystems, biodiversity, and various species. MPAs can have different levels of restrictions and regulations, depending on their specific objectives and conservation goals.
As of the current knowledge cutoff in September 2021, approximately 26.7% of the global oceans are designated as Marine Protected Areas. This means that a significant portion of the world's oceans has some form of protection and management in place to safeguard marine life and habitats. The establishment and expansion of MPAs have been driven by international agreements and initiatives, as well as national efforts by individual countries to conserve marine resources and promote sustainable practices.
It is worth noting that the percentage of MPAs in the global oceans may change over time as new areas are designated or existing MPAs are expanded. Therefore, it is important to refer to the most up-to-date data and reports from reputable sources to get the most accurate and current information on the extent of Marine Protected Areas worldwide.
Learn more about percentage here: brainly.com/question/29541337
#SPJ11
please explain how to use cancellation method with examples. I'm really confused...
Answer:
Cancellation it enables us to eliminate or get rid of one of the variables, so we can solve a more simplified equation.
Some textbooks refer to the elimination method as the addition method or the method of linear combination.
This is because we are going to combine two equations with addition!
Step 1
First, we align each equation so that like variables are organized into columns.
Step 2
Second, we eliminate a variable.
If the coefficients of one variable are opposites, you add the equations to eliminate a variable, and then solve.
If the coefficients are not opposites, then we multiply one or both equations by a number to create opposite coefficients, and then add the equations to eliminate a variable and solve.
Step 3
Thirdly, we substitute this value back into one of the original equations and solve for the other variable.
Example of how to apply the elimination method for solving systems of equations is attached.
Find the length of the hypotenuse of a right triangle whose legs measure 17 and 10. (Lesson 8. 2)
Answer:
19.72
Step-by-step explanation:
The temperature was -12°F at 6:00 a.m. The temperature rose 3°F every hour
until 6:00 p.m. At what time did the temperature reach 9°F?
The sum of two numbers is 52 and the difference is 12. What are the numbers?
Answer:
32 and 20
Step-by-step explanation:
x + y = 52
x - y = 12
2y = 40
y = 20
x = 32
PLEASE HELPP MEEE QUICK
Answer:
C
Step-by-step explanation:
If anyone knows please help asap!!
Answer:
u
Step-by-step explanation:
it is undefined because its a vertical line.
Answer:
slope is undefined u
Step-by-step explanation:
Calculate the slope m using the slope formula
m = \(\frac{y_{2}-y_{1} }{x_{2}-x_{1} }\)
with (x₁, y₁ ) = (1, - 3 ) and (x₂, y₂ ) = (1, 0 )
m = \(\frac{0-(-3)}{1-1}\) = \(\frac{0+3}{0}\) = \(\frac{3}{0}\)
Since division by zero is undefined then the slope of the line is undefined
how many soulutions to 7(x-5)=x+13?
Answer:
There is one solution
Step-by-step explanation:
The solution is \(x=8\)
Explanation:
\(7(x-5)=x+13\)
\(7x-35=x+13\)
\(6x=48\)
\(x=8\)
Answer:
c
Step-by-step explanation:
suppose that an usher randomly assigns the seats to the 7 people. find the probability that the three friends are next to each other.
The probability that the three friends are seated next to each other is 1/420
The total number of ways to seat the 7 people is 7! To find the number of ways to seat the three friends next to each other, we need to consider the number of ways to seat the other 4 people around them. So the number of favorable outcomes is 4!
The probability that the three friends are next to each other is then given by the ratio of the number of favorable outcomes to the total number of outcomes: (4!)/(7!) = 4!/5040 = 1/420.
So the probability that the three friends are seated next to each other is 1/420.
To learn more about probability, refer:-
https://brainly.com/question/9793303
#SPJ4
Elliott has 5 1/2 bags of birdseed.He uses 3 2/5 bags to feed the birds at the park.He puts the rest of the birdseed in the bird feeders in his yard.How much birdseed does Elliott put in the feeders in his yard?
Answer:
Elliott put 2.1 bags of birdseed in the feeders
Step-by-step explanation:
(5 1/2) - (3 2/5) = 2.1
I hope I helped! :)
Would appreciate Brainliest! ;)