Step-by-step explanation:
L.H.S=(1-cosB)(1+cosB)
=(1-cos^2B). {using (a+b) (a-b)=(a^2-b^2)in second step}
=sin^2B
=1/cosec^2B
Therefore,L.H.S=R.H.S proved
complete the identity
sin 2x - cot x
Answer:
Solve the scientific Calculator
Can some one
help please I don’t understand this problem.
This is for regular Geometry.
5x − 8( 1 + 7x ) = −8
Answer:
x = 0
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDASEquality PropertiesStep-by-step explanation:
Step 1: Define equation
5x - 8(1 + 7x) = -8
Step 2: Solve for x
Distribute -8: 5x - 8 - 56x = -8Combine like terms: -51x - 8 = -8Isolate x term: -51x = 0Isolate x: x = 0Step 3: Check
Plug in x into the original equation to verify it is a solution.
Substitute in x: 5(0) - 8(1 + 7(0)) = -8Multiply: 0 - 8(1 + 0) = -8Add: -8(1) = -8Multiply: -8 = -8Here we see that -8 does indeed equal -8.
∴ x = 0 is a solution of the equation.
geometry!! please help :(
Answer:
3
Step-by-step explanation:
Brianna answers 5 questions for each chapter of a book she reads in English class.
Write an equation to represent the total number of questions, q,Brianna answers based on the number of chapters, C,
in the book she reads.
Enter your equation in the box.
Answer:
q=5c
Step-by-step explanation:
q is the total number of questions, so the other numbers/variables must be multiplied together to equal q.
c is the number of chapters read, so that must be multiplied by 5 (questions per chapter) in order to equal q.
PLEASE HELP ASAP!!!!!!!!
A
B
C
D
Which table represents a function?
Answer:
D
Step-by-step explanation:
What numbers would be in the in the 4 sections of a 2 x 2 array that shows the problem 19 x 11?
100, 100, 90, 9
100, 10, 90, 9
100, 90, 10, 1
10, 10, 9, 9
Answer:
100, 90, 10, 1
Step-by-step explanation:
Hi can u please help me with this ASAP
Answer: an altitude
Step-by-step explanation:
How many terms are in the expression when simplified
Answer:
There are four (4) different terms
Step-by-step explanation:
Given;
2x + 3xy - (x + y) + 2
The terms are simplified as follows;
=2x + 3xy - (x + y) + 2
= 2x + 3xy - x - y + 2
collect like terms;
= 2x - x - y + 3xy + 2
= x - y + 3xy + 2
Thus, there are four (4) different terms in the simplified expression.
what is approximately equal to
[tex] \sqrt{47} [/tex]
A: 40
B: 7
C: 16
D: 9.4
Answer:
d
Step-by-step explanation:
d
PLEASE HELP MEEE!!!Which fraction is equivalent to a ratio of 3 to 4?
Answer:
3/4
Step-by-step explanation:
Just swap the colon (:) for a slash (/)
Answer:
Any of these should work for ya :)
3/4 = 6/8 = 9/12 = 12/16
= 15/20 = 18/24 = 21/28 = 24/32
= 27/36 = 30/40 = 33/44 = 36/48
= 39/52 = 42/56 = 45/60 = 48/64
= 51/68 = 54/72 = 57/76 = 60/80
= 63/84 = 66/88 = 69/92 = 72/96
= 75/100 = 78/104 = 81/108 = 84/112
= 87/116 = 90/120 = 93/124 = 96/128
= 99/132 = 102/136 = 105/140 = 108/144
= 111/148 = 114/152 = 117/156 = 120/160
= 123/164 = 126/168 = 129/172 = 132/176
= 135/180 = 138/184 = 141/188 = 144/192
= 147/196 = 150/200 = 153/204 = 156/208
= 159/212 = 162/216 = 165/220 = 168/224
= 171/228 = 174/232 = 177/236 = 180/240
= 183/244 = 186/248 = 189/252 = 192/256
= 195/260 = 198/264 = 201/268 = 204/272
= 207/276 = 210/280 = 213/284 = 216/288
= 219/292 = 222/296 = 225/300 = 228/304
= 231/308 = 234/312 = 237/316 = 240/320
= 243/324 = 246/328 = 249/332 = 252/336
= 255/340 = 258/344 = 261/348 = 264/352
= 267/356 = 270/360 = 273/364 = 276/368
= 279/372 = 282/376 = 285/380 = 288/384
= 291/388 = 294/392 = 297/396 = 300/400
<3 Enjoy,
Dea
Determine the intercepts of the line.
7x-5=4y -6
X-intercept:
y-intercept:
Answer:
x-intercept : (-0.1429,0)
y-intercept : (0,0.25
Can someone help and explain and do the solution pls :(
Consider ∆JWZ and ∆JKZ
WZ~KJ (given)
/ WZJ~/ KJZ (given)
JZ~JZ (common)
Therefore,
∆JWZ~∆JKZ by SAS congruence rule.
JW~ZK by CPCT.
if you're at the state fair with some friends and deciding between buying a jumbo pack of 50 ride tickets for $45 or medium pack of 30 ride tickets for $28.50 which pack is the better deal jumbo or medium now say sorry
i love you man
SAY IT BACK
SAY IT BAAACK
Answer:
I´m good
Step-by-step explanation:
Answer:
I love myself
and you
PLEASE I NEED THE ANSWER TO 1 + 1
Answer:
uhhhhh 3
Step-by-step explanation:
Step-by-step explanation: I know, hardest question known to man.
I need to find the area of these if you do it I will give you a 5-star rating and share you with other people brainiest included
Answer:
get up a calculator and multiply the numbers and it will give you an answer
Step-by-step explanation:
hope this helps
- 10x – y = -29
10x + 7y = 23
Answer:
x=3 and y=−1
Step-by-step explanation:
( PLEASE HELP , TIMED ) A pet supply store sells three dog collars and two leashes for $59.75. The same pet store sells one dog collar and three leashes for $53.75. Find the cost of one dog collar and one leash.
Answer:
how can i help also comment me i wanna talk bc im lonely lol
Step-by-step explanation:
The cost of one dog collar and one dog leash are 10.25 dollars and 14.5 dollars respectively
How to form an equation?let
the cost of each dog collars = x
the cost of each leashes = y
Therefore,
3x + 2y = 59.75
x + 3y = 53.75
Hence,
3x + 2y = 59.75
3x + 9y = 161.25
7y = 101.5
y = 101.5 / 7
y = 14.5
Therefore,
x + 3y = 53.75
x + 3(14.5) = 53.75
x = 53.75 - 43.5
x = 10.25
learn more on equation here: https://brainly.com/question/12060253
#SPJ2
On a test, Alice had 80% of the problems right. If she had
20 problems correct, how many questions were on the test?
Show work please
Answer: she would get 100%
Step-by-step explanation: every correct question u get 5 points so 20 * 5 = 100
Answer:
25
Step-by-step explanation:
80% = 0.80
0.80x = 20
0.80x/0.80 = 20/0.80
x = 25
So there was 25 questions on the test
Plz Help!
The population of Mathville is 8x10^5. The population of Algeville is 2x10^5. What is the difference in the populations?
7. Gary wants to buy a video game with a
selling price of $48, on sale for 50% off.
The sales tax in his state is 4.5%.
a. How much will Gary have to pay in all?
Answer:
25.08
Step-by-step explanation:
48 * 50% = 24
24 * 4.5% = 1.08
24 + 1.08 + 25.08
find the slope of the line that passes through the points (0, 6) and (20, 14).
Answer:
2/5
Step-by-step explanation:
Over the interval [0, 2π), what are the solutions to cos(2x) = cos(x)? Check all that apply.
0
StartFraction pi Over 3 EndFraction
StartFraction 2 pi Over 3 EndFraction
Pi
StartFraction 4 pi Over 3 EndFraction
StartFraction 5 pi Over 3 EndFraction
Answer:
Step-by-step explanation:
given the expression;
cos(2x) = cos(x)
According to trig identity;
cos(2x) = cos(x+x)
cos(2x) = cos x cos x - sinx sinx
cos(2x) = cos²(x)-sin²(x)
cos(2x) = cos²(x)-(1-cos²x)
cos(2x) = cos²(x)+cos²x-1
cos(2x) = 2cos²(x)-1
2cos²(x)-1 = cos(x)
let P = cosx
2P²-1 = P
2P²-P-1 = 0
Factorize;
2P²-2P+P-1 = 0
2P(P-1)+1(P-1) = 0
2P - 1 = 0 and P-1 = 0
P = 1/2 and 1
cosx = 1/2 and cos x = 1
x = arccos 1/2
x = π/3
Also;
x = arccos1
x = 0
Hence the value of x are 0 and π/3
Also the angle = π+ π/3 = 4π/3
The angles are 0, π/3 and 4π/3
Answer:
a,c,e
Step-by-step explanation:
I need help now I do not know what the answers are and this is due tonight
These are your best years. Trust me.
Blanca creates decorative wall hangings. She wants to look at the relationship between the diagonal length of the hangings and their weight. The data show a linear pattern with the summary statistics shown below: standard deviation = diagonal length (inches) 7 = 24.1 = 12 y = weight (pounds) y = 12.9 S = 16.2 0.0 Find the equation of the least-squares regression line for predicting the weight of the wall hanging from its diagonal length. Round your entries to the nearest hundredth
Answer: y=-16.38+1.22x
Step-by-step explanation:
Answer:y=-16.38+1.22x
Step-by-step explanation:
Stephanie gets an average of 11 calls during her 8 hour work day. What is the probability that Stephanie will get more than 4 calls in a 2 hour portion of her work day
Answer:
0.145
Step-by-step explanation:
Suppose λ = average number of an event occurring in an interval of a presented length; &
x = no. of events occurring in an interval length t
Thus, x has a Poisson distribution with parameter λt.
i.e.
[tex]P[X=k] = \dfrac{(\lambda t)^k\times e^{-\lambda t}}{k!} \ \ \ where; k = 0,1,2 ...[/tex]
Given that:
The average number of call every 8 hours = 11
Then, the parameter for the Poisson process [tex]\lambda =\dfrac{11}{8}[/tex]
where;
t = 2 hours
[tex]\lambda t = \dfrac{11}{8}\times 2[/tex]
[tex]\lambda t = \dfrac{11}{4}[/tex]
Also,
x = no. of calls occurring at an interval of length 2
The required probability is as follows:
P(x > 4) = 1 - [P ( x≤ 4) ]
[tex]=1 - [ P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3) + P(X = 4) ][/tex]
[tex]= 1 - \bigg [ \dfrac{(\dfrac{11}{4})^0 \times e^{-11/4}}{0!}+\dfrac{(\dfrac{11}{4})^1 \times e^{-11/4}}{1!}+ \dfrac{(\dfrac{11}{4})^2 \times e^{-11/4}}{2!}+ \dfrac{(\dfrac{11}{4})^3 \times e^{-11/4}}{3!}+ \dfrac{(\dfrac{11}{4})^4 \times e^{-11/4}}{4!} \bigg ][/tex]
[tex]= 1 - \begin {bmatrix} 1 + \dfrac{11}{4} + \dfrac{\bigg (\dfrac{11}{4}\bigg)^2}{2}+\dfrac{\bigg (\dfrac{11}{4}\bigg)^3}{6}+\dfrac{\bigg (\dfrac{11}{4}\bigg)^4}{24} \end {bmatrix} e^{-11/4}[/tex]
[tex]= 1 - [ 1 + 2.75 + 3.78125 + 3.466145833 + 2.3829] \ e^{-11/4}[/tex]
= 1 - [13.38037]× 0.06393
= 1 - 0.855407
= 0.14459
≅ 0.145 ( to 3 decimal place)
im doing a review for my class I've blurred my name but im struggling getting to understand some of these
help its 50 percent of my grade
Answer:A=144 P=40
Step-by-step explanation:
Answer:
Area is [tex]96^{2}[/tex] feet
Perimeter is 40ft