Given:
The expression is
[tex]\tan (\cos ^{-1}(-\dfrac{1}{2}))[/tex]
To find:
The value of given expression.
Solution:
We have,
[tex]\tan (\cos ^{-1}(-\dfrac{1}{2}))[/tex]
[tex]=\tan (\pi-\cos^{-1}(\dfrac{1}{2}))[/tex] [tex][\because \cos^{-1}(-\theta)=\pi -\cos^{-1}\theta][/tex]
[tex]=\tan (\pi-\cos^{-1}(\cos \dfrac{\pi}{3}))[/tex] [tex][\because \cos \dfrac{\pi}{3}=\dfrac{1}{2}][/tex]
[tex]=\tan (\pi-\dfrac{\pi}{3})[/tex]
[tex]=-\tan (\dfrac{\pi}{3})[/tex] [tex][\because \tan(\pi-\theta)=-\tan \theta][/tex]
[tex]=-\sqrt{3}[/tex] [tex][\because \tan \dfrac{\pi}{3}=\sqrt{3}][/tex]
Therefore, the value of given expression is [tex]-\sqrt{3}[/tex].
Find the Slope of the graph
Answer:
-2/+2.5
Step-by-step explanation:
it is going down by -2 every time for y and up by 2.5 every time for x
rise over run
hope this helps
Please help me fast ..
Answer these 2, i need help badly
What is 25 percent of 200?
What is 50 percent of 600?
Answer:
Step-by-step explanation:
50,300
Answer:
1. 50, 2. 300
Step-by-step explanation:
For 25 of 200, we can duplicate 100 and 25, which would turn out to be 50 and 200.
For 50 and 600, we can divide 600 by 2 to get 50 percent of it.
Answers:
25 of 200 = 50
50 of 600 = 300
Factor y^6+8z^6. Please show work!
Answer: b = 2z^2 (y^2 + 2z^2) (y^4 - 2y z^2 + 4z^4)
Step-by-step explanation: you have to factor using the sum of the cubes formula a^3 + b^3 = (a + b) ( a^2 - ab + b^2)
Find the slope of the line that passes through (100, 56) and (28,94)
Answer:
-19/36
Step-by-step explanation:
We can find the slope using
m = ( y2-y1)/(x2-x1)
m = ( 94-56)/( 28 -100)
= 38 / -72
= -19/36
Please help me solve this
Answer:
1/49
Step-by-step explanation:
1/7^2 is merely 1^2/7^2 which is 1/49
Hope this helps :D plz mark brainliest if correct.
Help me (10 points )
Answer:x=10
Step-by-step explanation:x x2
Please help me. i will mark you as most brilliance and give you 5 stars! Please be specific when answering. thank you! :)
Step-by-step explanation:
5x+52=9x+20
subtract 5x on both sides
subtract 20 on both sides
32=4x
divide by 4 on both sides
x=8
plug in x to the equations for A, D, and C
A and D are 92°
C is 56°
B and C will add up to 90, so
90-56=34°
13y-6=34
add 6 on both sides
13y=40
divide by 13
y=40/13 (I don't wanna calculate that)
plz help me thanks so much
Answer:
0
Step-by-step explanation:
The interval -7 <= x <= 1, has endpoints:
(-7, -1) and (1, -1)
There is no rate of change (the y-coordinates are the same), hence if one draws a line to connect the two points, the line will be horizontal. Therefore, the rate of change over the interval is 0.
According to your graphing calculator, what is the approximate solution to the trigonometric inequality
cos(0.65x) > 0.45 over the interval 0
Answer:
B the answer with 1.6985
Step-by-step explanation:
did it on graphing calc
The solution of the inequality is [0, 1.699].
We will graph y=cos(0.65x)-0.45 using a calculator. Image 1.
Then we draw the boundary x=0 and x=[tex]2\pi[/tex] on the same graph. And we try to find where y>0 on that graph. Image 2.
From the graph we see that y>0 that means cos(0.65x) > 0.45 is over the interval [0, 1.699].
Learn more: https://brainly.com/question/15816805
7 times a number is the same as 1 more than 3 times the number. What is the number?
Answer:
7n=12+3n
Step-by-step explanation:
Pretty please help me!!!
Which statement explains whether -4.5 can be a value in the shaded region
A. No it cannot, because -4.5 lies to the right of -3.5
B. No it cannot, because -4.5 lies to the right of -3.5
C. Yes it can, because-4.5 lies to the left of -3.5
D. Yes it can, because -4.5 lies to the right of -4.5
Given a:b and b:c, find a:b:c. Write the ratio in simplest form. a:b=10:25 and b:c=45:27
Answer:
a:b:c=2:5:3
Step-by-step explanation:
a:b=10:25
a:b=2:5(divided by 5)
b:c=45:27
b:c=5:3(divided by 9)
a:b:c=2:5:3
please hurry and help
Joyce paid $45.00 for an item at the store that was 75 percent off the original price. What was the original price?
Answer:
$60
Step-by-step explanation:
45 x 100/75 = 60
Answer:11.25
Step-by-step explanation:
45×0.75 45-33.75=11.25
Find the value of X, I need help solving this.
Answer:
32
Step-by-step explanation:
180-83=97
3*32=96
+1=97
Leigh and Sara paid $1,178 last month to rent their apartment. Last month had 31 days. They divide to find out how much they paid per day. ?
Answer:
Step-by-step explanation:
Divide 1178 by 2 will equal 589
This is how much each will pay per month
589 divided by 31 = 19 dollars a day per person
Answer: first quoitent is 31 second quotent is 6
Step-by-step explanation:
divide 1,178 with 31 so thats how you get your answer
f ( x) = 6 (1 - x ) what is the vaule of (-8)
Answer:
f(x) = 54
Step-by-step explanation:
Plugging in -8 we get f(x) = 6(1-(-8)) since there is a double negative we can simplify it to a positive --> f(x) = 6 (1 +8) now distribute 6 to all factors in ( )
6 times 1 is 6 and 6 times 8 is 48. So now we have 6 + 48 which = 54
Laurie asked 100 of her friends to choose their favorite flower. Fifteen of them chose carnations, 58 chose roses and the rest daises. What percent of her friends chose daises? 73 percent, 58 percent, 15 percent, 27 percent
Answer:
27%
Step-by-step explanation:
Mr. Sartin has 2 gallons of paint that will cover 750 Sq. Ft. He needs to cover 3000 Sq. Ft.. How many more gallons of paint does he need?
Answer:
8 galons
Step-by-step explanation:
line every information by type of units
2 gallons for 750 sq ft
? galons for 3000sq ft
crossmultiply
?*750=2*3000
divide both sides by 750
?=(2*3000) /750= 8
If F(x) =
2x-3/5
which of the following is the inverse of F(x)?
Write an article for publication on why students should not cheat during examination
Answer:
The thing with exams, is that they just keep getting harder, and the consequences get more severe. Many people find themselves unable to pursue a career they want because they cannot score high on some test, and they blame the whole stupid system - but they did have 12+ years to practice taking tests.
It seems to arbitrary as a kid, but cheating tactics exist and change at all levels of education - there's not really any cumulative benefit to working on your cheating, and there's not a skill barrier to getting into cheating.
Tests on the other hand are a very arbitrary system, and the skill of taking tests can be trained. If you want to cheat, then study up on exam skills and memory tricks and studying tools. Then learn great ways to score highly on exams and it will be all the fun of cheating but you're never getting in trouble or stressed about getting caught.
In a very...amoralistic sorta way one could consider cheating to be your 'ace in the hole' sorta like steroids and athletic performance. It may be enough to push you to the next level, but if you do it early then you will never have the chance to benefit quite that much again - reputations of academic dishonesty follow you, and getting caught at the very least shows future employers that your discretion is lacking.
In that sense it is probably worthwhile to get as good at school and exams as possible, and only consider cheating when there is some life and death situation on the line and it is justifiable. Cheating is a real strategy, but it has real risks.
If you think of vegas, cheating is like trying to look at someone elses cards, or coordinate a strategy to get money out of a Casino. The casino knows you want to do this and is looking for you to do that. Now if you count cards like that recent movie about the MIT kids, there is nothing physically different about what you do - but you stack the odds in y our favor and can get on a seriously bad side of some Casinos if you are caught doing it.
Now here's the neat thing about tests - you can make way more money by being good at tests than you can by being good at counting cards (with a few notable exceptions) and you're supposed to be counting cards for the exam! The whole idea of the exam is to force you to prepare, and find some way to allow you to prove that you have mastered the material.
Exams will follow you through every stage of life, so getting good at them is an investment, and like I said it never gets easier. Like...try and fail and work new strategies all you want until your last 2 years of highschool - there's no significant consequences for failure at that point. From there forward your future really is on the line, cheat in highschool and you are at the mercy of your administrators and later the admissions officials opinion of cheaters.
With a mean of 100 and standard deviation of 15, what percentage of IQ scores are less than 110
Answer:
i think 125
Step-by-step explanation:
Asher pays $156 every 6 weeks for piano lessons. What is the price per year for piano lessons?
Answer:
About 1352$
Step-by-step explanation:
Answer:
4 3/8 cups of chopped vegetables
Step-by-step explanation:
I did 10/4 to get 2.5
Then I multiplied 2.5 x 1.75. (I did 1.75 instead of 1 3/4. They're the same)
Then I got 4.375
4.375 = 4 3/8
(3) The HCF of two numbers is 6, if one of the numbers is 42, find the other
number?
Answer:
7jfkr
Step-by-step explanation:
its 7 because just because
Classify the following: 9G-7
Answer:
I'm pretty sure it is a expression
find the area + perimeter of the following triangle
Answer:
Perimeter = 14[tex]\sqrt{2}[/tex]
Area = [tex]\sqrt{42}[/tex]
Step-by-step explanation:
Find the slope of the line passing through the points (-3.6) and (8. 6).
Perimeter = 2 x Length + 2 x Width
The perimeter of a rectangle is 66. If the Length is two more
than three times the Width, what is the length of that rectangle?
Answer:
25.25Step-by-step explanation:
Let the width be x
Then the length is 3x + 2Perimeter = 66Perimeter formula
P = 2(l +w)Substitute values
66 = 2(3x + 2 + x)33 = 4x + 24x = 31x = 31/4x = 7.75The length is:
3*7.75 + 2 = 25.25You should plan on 1 1/2 pounds of turkey per person. Your family is having 10 people for Thanksgiving dinner. How many pound turkey should you plan to buy?
Answer:
Weight of total turkey need = 15 pound turkey
Step-by-step explanation:
Given:
Turkey need per person = 1[tex]\frac{1}{2}[/tex] pound turkey = 3/2 pound turkey
Total person = 10
Find:
Weight of total turkey need
Computation:
Weight of total turkey need = (3/2)(10)
Weight of total turkey need = 15 pound turkey
