if cos(x) = -1/4 and tan(x) < 0, what is sin(2x)
Answer:
B is correct: (-sqrt15)/8
Step-by-step explanation:
The value of the x is 104.5° then the value of the sin 2x is -0.49. Then the correct option is B.
What is trigonometry?Trigonometry deals with the relationship between the sides and angles of a right-angle triangle.
If cos(x) = -1/4 and tan(x) < 0
Then the value of the x will be
[tex]\begin{aligned} \cos x &= - \dfrac{1}{4}\\\\x &= \cos^{-1} \dfrac{-1}{4}\\\\x &= 104.5^o \end{aligned}[/tex]
Then the value of the sin 2x will be
[tex]\sin 2x = \sin 2*104.5^o\\\\\sin 2x = \sin 209^o\\\\\sin 2x = -0.4848 \approx 0.49[/tex]
More about the trigonometry link is given below.
https://brainly.com/question/22698523
Lisa and Susan are driving to college together. They look at a map to find out how far they have to drive. On the map, Lisa measures the distance to be 3.5 inches. How many miles do they have to drive if the map scale is 1 in.=50ml
Answer:
3.5 * 50 =175 mi :)
Step-by-step explanation:
Which number when rounded to the nearest hundredth is 37.62?
A. 37.612
B. 37.618
C. 37.627
D. 37.626
Answer:
Letter B. 36.618
Step-by-step explanation:
6 is the tenth 1 is the hundredth, so look at the next number (8/thousandth) and of its 5 or more raise the score, 4 or less let it rest, 8 is 5 or higher so you then remove the 8 and raise the 1 in hundreths place to a 2
40 is 25% of what number?
Answer:
160
Step-by-step explanation:
Answer:
=160
Step-by-step explanation:
25% is 1/4 of a number so..
40 x 4= 160
Hope this helps (:
Find all solutions in the interval [0, 2π).
2 sin^2 x = sin x
Answer:
0, π, 2π, π/6 and 5+(π/6)
Step-by-step explanation:
Rearranging, sinx (2 sinx - 1) = 0.
In [0, 2π],sin x = 0 for x = 0, π and 2π.
The other factor = 0 gives the other two solutions.
sin 5+(π/6) = sin (π−(π-6)) = sin π/6 = 1/2.
To determine the percentage of alcohol in a liquid contains?
Answer:
Formula for Calculating Alcohol in Beer
Step-by-step explanation:
Subtract the Original Gravity from the Final Gravity.
Multiply this number by 131.25.
The resulting number is your alcohol percent, or ABV%
Please help ASAP !!!!!!
Answer:
7 or 8
Step-by-step explanation:
7 when each member does at least one of the three,and 8 when some do neither of the three.
Which situation is represented by the equation 6x = 4x + 18? a, James paid $18 for 4 books. What is the cost of one book? b. James paid the same amount for 6 books as he did for 4 books and a CD that costs $18. What was the cost of each book? c. Six times a number is the same as 4 times the number decreased by 18. What is the number x? d. Six more than the number of red beads in a bag is the same as 18 more than 4 times the number of red beads in the bag. What is x, the number of red beads in the bag,
HURRY PLEASE
Answer:
B
Step-by-step explanation:
Option B best displays/showcases the equation of 6x = 4x +18
Am I right please helppppppppppppppppp
slope is the change in y over the change in x.
Using the first and last values:
Slope = (8 - -4)/ (2 - -2)
Slope = 12/4
Slope = 3
Your answer is correct
Can someone do these problems, thank you :-)
Answer:
Step-by-step explanation:
1) 2^2 + 2^2 = c^2
4 + 4 = c^2
8 = c^2
c = sqrt8
2) 2^2 + 3^2 = c^2
4 + 9 = c^2
13 = c^2
c = sqrt13
3) 10^2 + 4^2 = c^2
100 + 8 = c^2
108 = c^2
c = sqrt108
4) 1^2 + 5^2 = c^2
1 + 25 = c^2
26 = c^2
c = sqrt26
5) 3^2 + 1^2 = c^2
9 + 1 = c^2
10 = c^2
c = sqrt 10
6) 9^2 + 9^2 = c^2
81 + 81 = c^2
162 = c^2
c = sqrt162
What is the slope of the line on the graph?
Answer:
[tex]m=\frac{1}{2}[/tex]
Step-by-step explanation:
Slope Formula: [tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]
Simply plug in 2 coordinates into the slope formula to find slope m:
(0, 2)
(-4, 0)
[tex]m=\frac{2-0}{0-(-4)}[/tex]
[tex]m=\frac{2}{0+4}[/tex]
[tex]m=\frac{2}{4}[/tex]
[tex]m=\frac{1}{2}[/tex]
329-(-104)
Help ASAP
Answer:
433
Step-by-step explanation:
When there are 2 neatives together like that it changes to a positive. So it woud be 329+104=433
What division problem does the model represent? ...÷1/3
The quotient is...
What division problem does the model represent?
✔ 5/3 Divided by one-third
The quotient is ✔ 5
Step-by-step explanation:
just did it
Your ship accidentally left an alien stranded at your starting location.
How does the slope of this line compare with the slope of the line from the origin to the point (1, 4)?
They are the same.
They are opposites of each other.
They are reciprocals of each other.
The second line has no slope.
Answer:
they are the same
Step-by-step explanation:
Answer:
They are the same got it right on edg
Step-by-step explanation:
If x = 3(y+w)– 1, what is the value of w in terms of x and y?
Given the line: y = -1/5x-3, what is the slope of a line parallel and perpendicular
to the function
Answer:
parallel: m= -1/5
parpendicular: m= 5
Step-by-step explanation:
parallel lines have the same slope
- 1 stays the same so - 1
5 5
parpendicular lines have the opposite reciprocal slope
- 1 flipped is - 5 turn the negative into a positive 5 or 5
5 1 1
The ratio of boys to girls in ms Cunningham’s class is 2 to 3. There are 18 girls in the class. What is the total number of students in her class?
Answer:
30 students
Step-by-step explanation:
you have a ratio, and an unknown amount, so set up a proportion
[tex]\frac{2}{3} = \frac{x}{18}[/tex] I used x because the amount of boys is unknown
so then, cross multiply
(so do 3 times x, and 2 times 18)
[tex]3x=36[/tex]
then divide both sides by 3 to get x by itself, and you get
[tex]x=12[/tex]
this means there are 12 boys in the class. because the problem is asking for the total number of students, add 12 and 18 (the number of boys and girls).
you get 30, so there are 30 students in her class.
Need help !!!!!! !!!!!
Answer:
C is your answer
Is 3/4 a repeating decimal
Answer:
No.
Step-by-step explanation:
3/4 = 0.75
Answer: non-repeating
Step-by-step explanation:
Carter wants to know how often his classmates go to amusement parks. He asks the following question: “Did you go to an amusement park this summer?”
Is his question a statistical question? Explain why or why not.
Answer:
No, it is not
Step-by-step explanation:
This is not a statistical question because there is no need to apply any sort of math. This is a question that can easily be answered with a yes or no.
Answer:
Sample Response: No. A statistical question addresses difference in a population and offers a variety of responses. Carter’s question would yield only yes or no responses.
I need help on this..
Answer:
you divide the big number by the little number
Step-by-step explanation:
Marissa is choosing a four-digit PIN for her ATM card. The first digit must be a digit from 1 through 9. For the other three digits, she can choose any combination of digits 0 through 9, but may not repeat a digit. Which shows part of the sample space for Marissa’s PIN?
Answer: the answer is C
Step-by-step explanation:
i did it
In the diagram below, lines x and y are parallel. What is the relationship between angle b and e? Write an equation if it help
Answer:
there is no relationship between the two angles if E switched with D then id say corresponding but theres not
Jenny has a rectangular poster. The poster is 1.6 meters long and 1.2 meters wide. What is the area of the poster in square centimeters? Do not round your answer.
Answer:
1.92 m^2
Step-by-step explanation:
1.6 m x 1.2 m
1.92 m^2
QUICKKKKK Someone plz answer number 2
Answer:
5 times the sun of 2x and 3y equals the difference of y to the second power and 2x cubed
13)
24 + f = 54
Show some work
Answer: 30
Step-by-step explanation:
24 + f = 54
f = 54 - 24
f = 30
Answer:
f=30
Step-by-step explanation:
You want to get x by itself on one side, so in order to do that, you need to subtract the 24, and if you do it one side, you need to do it to the other side.
That would give you:
24-24+f=54-24
then simplify it to be:
f=30
Wendy walks 2 miles in 22 minutes. She continues to walk at the same rate. How many minutes will it take her to walk 11 miles? Use a double number line to support your answer.
Answer:
121 minutes
Step-by-step explanation:
First, we divide the time by the miles
22 ÷ 2 = 11
So now that we have the unit rate, 1 mile for every 11 minutes, we can multiply 11 (the unit rate minutes) by 11 (the given miles she wants to reach)
11 x 11 = 121
So, in 121 minutes, Wendy can walk 11 miles.
(the double number line will look something like this, but going all the way until 121:11)
Express 14 inches: 3 feet in fraction form
Answer: 4 [tex]\frac{2}{12}[/tex]
Step 1: Convert 14 inches to feet and inches.
14 inches = 1 foot, 2 inches.
Step 2: Find the total.
4 feet, 2 inches.
Step 3: Write two of twelve inches as a fraction.
Answer = [tex]\frac{2}{12\\}[/tex]
Step 4: Write final answer down correct.
4 [tex]\frac{2}{12}[/tex]
Hope this helps you!
I don’t understand this question.
Answer:
The answer is 106 degrees
Step-by-step explanation:
Mia runs a 5-kilometer race (3.1 miles). If each mile, on average, takes her 8.7 minutes, what is her total time for the race? Enter the correct answer in the box.