prove that sin30/cos30+sin60/cos60=sin90​

Answers

Answer 1

Step-by-step explanation:

If you like my answer than please mark me brainliest thanks

Answer 2

you just have to expand the trig. functions into their corresponding values and then finish them off.


Related Questions

what percent is 50cent of 50cent ​

Answers

what

Step-by-step explanation:

pretty sure its 25 percent

Answer:

25%

Step-by-step explanation:

if you take half of 50 it is 25 so all of it is used or 25%

Hope this helps <3 Comment if you want more thanks and be sure to give brainliest (4 left) <3

what is 9/10 + 7/15

Answers

[tex]\huge\text{Hey there!}[/tex]

[tex]\mathsf{\dfrac{9}{10}+\dfrac{7}{15}}[/tex]

[tex]\large\textsf{FIRST: FIND the LCD (Lowest Common Denominator) then solve}\\\large\textsf{from there!}[/tex]

[tex]\large\textsf{If you have calculated it correctly, you should have came up with \underline{\bf 30}}\\\large\textsf{as your LCD (Lowest Common Denominator).}[/tex]

[tex]\mathsf{= \dfrac{9\times3}{10\times3}+ \dfrac{7\times2}{15\times2}}[/tex]

[tex]\mathsf{9\times3=\bf 27}\\\mathsf{10\times3=\bf 30}\\\\\mathsf{7\times2=\bf 14}\\\mathsf{15\times2=\bf 30}[/tex]

[tex]\mathsf{= \dfrac{27}{30}+\dfrac{14}{30}}[/tex]

[tex]\mathsf{= \dfrac{27+14}{30}}[/tex]

[tex]\mathsf{27+ 14=\bf 41}\\\\\mathsf{30+0=\bf 30}[/tex]

[tex]\mathsf{= \dfrac{41}{30}}\large\textsf{ which you could convert to }\mathsf{1 \dfrac{11}{30}}[/tex]

[tex]\boxed{\boxed{\large\textsf{ANSWER: }\bf \dfrac{41}{30} \large\textsf{ or }\mathsf{\bf 1 \dfrac{11}{30}\large\textsf{ because they both equal the same thing}}}}}\huge\checkmark[/tex]

[tex]\large\text{Good luck on your assignment and enjoy your day!}[/tex]

~[tex]\frak{Amphitrite1040:)}[/tex]

help please! willing to give brainly and 5 stars ​

Answers

Answer:

The answer is 8

Step-by-step explanation:

Answer:

8

Step-by-step explanation:

2/5x-8/5y+x+½y

2/5(1)-8/5(-6)+1+½(-6)

2/5+48/5+1-3

10-2

8


Using your textbook, solve the problems below. Show your work.
Solve for y:
y + 8 = 2

Answers

Answer:

i dont know lol

Step-by-step explanation:

Point A lies outside of plane P. How many planes can be drawn that pass through point A?

A. 0
B. an infinite number
C. 2
D. 1

Answers

Answer:

D.

Step-by-step explanation:

.

The number of planes that can be drawn that pass through point A is 1.

How to estimate the number of planes that can be drawn that pass through point A?

A perpendicular line creates an angle of 90° with a line or a plane. If a line exists to be drawn from a point to a line or a plane it can only be one. In this case, a line exists to be drawn through a point A to a plane P. If the line stands to be perpendicular, then it exists only one.

Therefore, the correct answer is option D. 1.

To learn more about points on a plane refer to:

https://brainly.com/question/10680920

#SPJ2

A survey is sent out to 500 people asking questions related to the link between religion and sexual behavior at a young age. The survey does not have any tracking device, and the results are sent to a database that gives no indication of who or where the results came from. However, the database is posted online for religion and human behavior researchers to freely conduct statistical analyses. The responses to this survey are
a. both confidential and anonymous.
b. confidential only.
c. anonymous only.
d. neither confidential nor anonymous.

Answers

Answer:

c

Step-by-step explanation:

Since the the identities of the survey takers were kept secret, it would be anonymous. If it wasn't anonymous, then people would know who took the survey.

Since the survey results were released online for analyses, it is not confidential. If it were to be confidential, then the survey distributors would have kept the results to themseles.

The distribution of SAT scores is approximately normal with a mean of 1500.
If 1628 is the 90th percentile, what is the standard deviation?

Answers

Answer:

Hello,

Answer

[tex]\sigma=457,95...[/tex]

Step-by-step explanation:

p(z<a)=0.9

p(z<1.29)=0.9015

p(z<1.28)=0.8997

using linear interpolation: with 4 decimals

p(z<1.282)<0.9

[tex]\dfrac{1628-1500}{\sigma} =1.282\\\\\sigma =\dfrac{1628-1500}{1.282}\\\\\sigma=457,95...\\[/tex]

What triangle is this

Answers

isosceles triangle

HOPE SO IT HELPS YOU

Answer:

Isosceles.

Step-by-step explanation:

It's an isosceles triangle because 2 sides  are congruent ( 2 are 23 yds long).

ko dung may tinh hay so sanh
3√7 vs 7√3

Answers

Answer:

what this makes bi sense haha

Step-by-step explanation:

but ok

Consider the probability that greater than 26 out of 124 software users will call technical support. Assume the probability that a given software user will call technical support is 97%. Specify whether the normal curve can be used as an approximation to the binomial probability by verifying the necessary conditions.

Answers

Answer:

Since [tex]n(1-p) = 3.72 < 10[/tex], the normal curve cannot be used as an approximation to the binomial probability.

100% probability that greater than 26 out of 124 software users will call technical support.

Step-by-step explanation:

Test if the normal curve can be used as an approximation to the binomial probability by verifying the necessary conditions.

It is needed that:

[tex]np \geq 10[/tex] and [tex]n(1-p) \geq 10[/tex]

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]

In which [tex]C_{n,x}[/tex] is the number of different combinations of x objects from a set of n elements, given by the following formula.

[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]

And p is the probability of X happening.

Can be approximated to a normal distribution, using the expected value and the standard deviation.

The expected value of the binomial distribution is:

[tex]E(X) = np[/tex]

The standard deviation of the binomial distribution is:

[tex]\sqrt{V(X)} = \sqrt{np(1-p)}[/tex]

Normal probability distribution

Problems of normally distributed distributions can be solved using the z-score formula.

In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the z-score of a measure X is given by:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

When we are approximating a binomial distribution to a normal one, we have that [tex]\mu = E(X)[/tex], [tex]\sigma = \sqrt{V(X)}[/tex].

Out of 124 software users

This means that [tex]n = 124[/tex]

Assume the probability that a given software user will call technical support is 97%.

This means that [tex]p = 0.97[/tex]

Conditions:

[tex]np = 124*0.97 = 120.28 \geq 10[/tex]

[tex]n(1-p) = 124*0.03 = 3.72 < 10[/tex]

Since [tex]n(1-p) = 3.72 < 10[/tex], the normal curve cannot be used as an approximation to the binomial probability.

Consider the probability that greater than 26 out of 124 software users will call technical support.

The lowest possible probability of those is 27, so, if it is 0, since it is considerably below the mean, 100% probability of being greater. We have that:

[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]

[tex]P(X = 27) = C_{124,27}.(0.97)^{27}.(0.03)^{97} = 0[/tex]

1 - 0 = 1

100% probability that greater than 26 out of 124 software users will call technical support.

letter A represents the decimal

Answers

Answer:

answer is 0.4

Step-by-step explanation:

The decimal would be 0.8

Work out how many more skirts were sold on Friday than on Thursday ?

Answers

Answer:

15 more were sold on friday then thursday

Step-by-step explanation:

Is this a function graph

Answers

yes it is a function graph

In a group of 50 students, 12 play basketball and volleyball
, 9 play volleyball
and soccer, 8 play basketball and play soccer, and 4 play all 3 sports.
Altogether, 21 play basketball, 22 play volleyball, and 19 play soccer. How
many of the 50 students don't play any of the 3 sports?

Answers

Answer:

17 don't play any

Step-by-step explanation:

12+9+8+4=33

33-50=17

solve for P assume that none of the denominators are equal to 0
Kl=y(f/p+n + r/u)​

Answers

Step-by-step explanation:

KI=yf/p+n + yr/u

(p+n) KI - yrp/u -yrn/u = yf

pKI - yrp/u = yf - nKI + yrn/u

p(KI - yr/u) = yf - nKI + yrn/u

p = (1/KI-yr/u)(yf-nKI+yrn/u)

HELP ME OUT ASAPPP PLSSS

Answers

Answer:

https://linksharing.samsungcloud.com/ul5cX9oOmhzt

Yemi earns 8000naira a month and Bisi earns 6000naira a month. Find the ratio between their income.​

Answers

Answer:

8:6

or

4:3

Step-by-step explanation:

In remodeling a house an architect finds that by adding the same amount to each dimension of a 15ft by 19ft rectangular room, the area would be increased by 98 ft^2. How
much must be added to each dimension?
Let x be the amount that is added to each dimension. After writing an equation in standard form with a > 0, a= ? b= ? and c= ?
(Simplify your answers.)

Answers

Answer:

Step-by-step explanation:

new length=15+x

width=19+x

then area=(15+x)×(19+x)=285+15x+19x+x²=x²+34x+285 ft²

original area=15×19=285 ft²

then 285+98=x²+34x+285

or

x²+34x-98=0

x²+34x+17²=98+17²

(x+17)²=98+289=387

x+17=√387=3√43

x=3√43-17 ft

I need help thanks you!

Answers

I think its C: 2 hours. sry if its wrong

Khảo sát 600 sinh viên trường thấy có có 520 sinh viên thích các hoạt động của Hội Thanh Niên nhà trường. Với độ tin cậy 95%, ta có ước lượng tỷ lệ sinh viên toàn trường thích các hoạt động của Hội Thanh Niên thuộc khoảng

Answers

Answer:

I don't know ans OK bro because I can't understand your language what are you writing

Sample information: 24 out of 1000 people who were surveyed had type 2 diabetes. Use the above sample information and construct two confidence intervals (one with confidence level of 90% and the other one with confidence level of 99%) to estimate the proportion of people who have type 2 diabetes. What is the relationship between the confidence level and the size of the confidence interval? Is this significant? Why is it important to understand this concept?

Answers

Answer:

it is important because the number of people who are infected by the disease is rising

i have 6 one, 7 tens and 14 hundreds. what number am i?​

Answers

Answer:

Step-by-step explanation:

6×1 = 6

7×10 = 70

14×100 = 1400

6+70+1400 = 1476

Answer:

1,476

Step-by-step explanation:

I hope this helps you out! (please give me brainliest)

6x + 7y = 4x + 4y
Complete the missing value in the solution to the equation.
( ?,-4)

Answers

Hi there!  

»»————- ★ ————-««

I believe your answer is:  

(6, -4)

[tex]x = 6[/tex]

»»————- ★ ————-««  

Here’s why:  

⸻⸻⸻⸻

We would need to solve for 'x'. We are already given the 'y' value of '-4', so we would need to substitute y for '-4', and then undo operations to isolate 'x'.

⸻⸻⸻⸻

[tex]\rightarrow 6x + 7(-4) =4x + 4(-4)\\\\\rightarrow 6x - 28 = 4x - 16\\\\\rightarrow 6x - 28 + 28 = 4x - 16 + 28\\\\\rightarrow 6x = 4x + 12\\\\\rightarrow 6x - 4x = 4x - 4x + 12\\\\\rightarrow 2x = 12\\\\\rightarrow \frac{2x=12}{2}\\\\\rightarrow \boxed{x = 6}[/tex]

⸻⸻⸻⸻

The '6' would replace the question mark.

»»————- ★ ————-««  

Hope this helps you. I apologize if it’s incorrect.  

7th grade math!!! Please help!! will mark brainlist ​

Answers

The answer is the first choice. If every 2 cm. is 4 cm., that means that the dimensions' values are doubled. Then, you can just double the dimensions. Preferably, in my opinion, this is the easier way to go. By your preference, though, you can do it the longer way as well.

There are 4 2s in the number 8.

There are 3 2s in the number 6.

If each of the 2s are 4s,

So, therefore,

Transforming the 2s to 4s,

4x4=16 cm.

3x4=12 cm.

So, this means that the final answer is the first choice. I hoped that this helped  answer your question. Enjoy your day, and take care!

Answer:

`Length=16 feet, width=12 feet

Image result for how to  use scale model step by step'

Divide the real life dimension of either length or width by that of the model. So the real life object had a length of 32m, and the model had a length of 8, then do 8(4). This is equal to 32, then divide by 2.

Hope this helps love <3

Find the missing ? Step by step need it

Answers

Answer:

30 degrees

Step-by-step explanation:

Use the Tan formula.

Which of the following graphs is the same as y = log12X?

Answers

Answer:

Step-by-step explanation:

(7 points) for the given diagram, it is known that e is the midpoint of ad and bc. use this information to prove that triangle aec= triangle deb. each congruence or ewuality and statement must be accompanied by a reason
PLS HELP

Answers

Given:

E is the midpoint of AD and BC.

To prove:

[tex]\Delta AEC\cong DEB[/tex]

Proof:

Statement                                                    Reason

1. E is the midpoint of AD and BC            1. Given

2. [tex]AE\cong DE[/tex]                                              2. Definition of midpoint

3. [tex]CE\cong BE[/tex]                                              3. Definition of midpoint

4. [tex]\angle AEC\cong \angle DEB[/tex]                                    4. Vertically opposite angle

5. [tex]\triangle AEC\cong \triangle DEB[/tex]                                   5. SAS congruence postulate

Hence proved.

Your small business spent $40 on food and another $60 on materials. Then, you sold an item for $120, but you had to pay a $90 service fee. Finally, you were given a refund from the Internal Revenue Service (IRS) for $70. If the expression describing these transactions is the following, then how does it evaluate?

Answers

Answer:

40$+60$=100$ spent

120$sold

90$ payed

70$ refund

120 (sold) -90 (payed) =30+70 (refund) =100$ (profit)

Step-by-step explanation:

You spent 100$

And you sold and got 120 but you payed 90$ from 120$ money left is 30$

Then they refunded you (pay back the money (give you the money ))

So the money that your left with is 30$ and the refund money is 70$

So add the money that your left with is gives you 100$

What is an equation of the line that passes through the points (-1, 6) and
(-1, -5)?

Answers

Answer:

x = -1

Step-by-step explanation:

Because the line passes through two points that both have the same x value, this means the line is vertical, and the slope is undefined.

So the equation of the line is x = -1.

How many solutions does the nonlinear system of equations graphed below have?
A. Four
B. Two
C. One
D. Zero​

Answers

Answer:

Option (A)

Step-by-step explanation:

Solution of two functions represented by the graph are the common points or point of intersection of the graphs.

From the graph attached,

Parabola and ellipse are intersecting each other at four points.

Therefore, solutions of the given non linear functions will be FOUR.

Option (A) will be the correct option.

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what is simple machine? What is the standard form for the quadratic function? g(x)=(x6)25 PLZ HELP GIVING BRAINLIEST AND ALL POINTS!!What is true about map projections? A They show flat surfaces in a curved manner. B They all distort some part of the earth's surface. C They show the true scale of all of earth's features. D They were developed by early historians. Predict the output... LET A= -20.50 LET B = ABS(A) PRINT B END A payday loan store charges $25 for a one-month loan of $600. What annual interest rate is this equivalent to? Colorado Cleaning has a 5-year maximum acceptable payback period. The firm is considering the purchase of a new washing machine and must choose between two alternative ones. The first machine requires an initial investment of $25,000 and generates annual after-tax cash inflows of $6,500 for each of the next 8 years. The second machine requires an initial investment of $75,000 and provides an annual cash inflow after taxes of $9,500 for 15 years.Required:a. Determine the payback period for each machine.b. Comment on the acceptability of the machines, assuming that they are independent projects.c. Which machine should the firm accept? Why?d. Do the machines in this problem illustrate any of the weaknesses of using payback? Discuss. ANSWER PLEASE WILL GIVE EXTRA POINTS AND BRAINLIST What is the definition of conflict?A.Problems or obstacles that make it difficult for characters to achieve their goalsB.A speech the character gives about his or her thoughts and feelingsC.Text in a script that tells actors how to speak lines or how to moveD.Words characters speak out loud to each other during a play The graph shown below expresses a radical function that can be written in17the form f(x) = a(x + k)!C. What does the graph tell you about thevalue of k in this function what are the factors of evaporation and give explanation Which sculpture process is additiveand which is subtractive? Which statement is true about figures ABCD and A'B'C'D'?54c3/D'B21 2 3 4 51A-5 -4 -3 -2 -1 0AS - 1-2DB-41-31 1.Waheeda mixes water with some lemon juice to make lemonade. Write an equation to represent how much lemon juice is needed when Waheeda uses 18 ounces of water.2. Identify the independent and dependent variables in the situation.Independent variable: Dependent variable: b) Write an equation representing the amount Waheeda earns in relation to the number of glasses of lemonade she sells.Equation: c) In which Quadrant of a graph would her data appear? Explain. Please help! It took Suki 127 minutes from start to finish to carve her pumpkin. Carving the pumpkin took her 13 fewer minutes than 10 times as long as it took her to pick the pumpkin out at the pumpkin patch. Write and solve an equation to find how long it took Suki to pick out her pumpkin. Why 1975 can't be the sum of two squares. Or prove that the equality x ^ 2 + y ^ 2 = 1975 has no solutions in integers HELP ASAP!!!What size object (impactor) may create such a crater? A rocket is fired upward with an initial velocity v of 100 meters per second. The quadratic function S(t)=-5t^2+100t can be used to find the height s of the rocket, in meters, at any time t in seconds. Find the height of the rocket 7 seconds after it takes off. During the course of its flight, after how many seconds will the rocket be at a height of 450 meters? Pick out non - infinite He always knew the right time to begin everything. knew to begin always Describe the medieval feudal system. WILL GIVE BRAINLIEST!!Rewrite each sentence using correct punctuation, end punctuation, and adding quotation marks where needed.1. aunt sally, did you ever play piano asked SusieI think you play beautifullywill you teach me to play like you2. tim asked do you have my toolsi left a hammer a screwdriver nails and screws to build the picture frameif i can't find them i will have to borrow tools from mr green3. when will we get to visit disney world asked stanlast year we went to the Jacksonville zoo where we saw lions tigers and bears4. grandpa said thank you, jenny, for your gift.i have never received any gift that i like so muchi will think of you jenny when I use it5. my sister said, janet borrowed all my fine jewelry for her partydo you know when she will return from shopping so that i can get it back When President Andrew Johnson violated the Tenure of Office Act, he was a. reelected. c. impeached. b. supported. d. overridden.