Help help help math math
Answer:
30
Step-by-step explanation:
30/5 = 6
Given f(x) = 10/x^2- 7x-30
which of the following is true?
(see attached image, it’s not A)
Answer: f(x) is positive for all x<10
Proof of validity is shown below.
Luke’s has seven coins. He can make 11p with two of his coins. He can make 11p with three of his coins. He can make 11p with four of his coins. What are the seven coin that Luke’s has?
Answer:
1p 2p 2p 2p 5p 5p 10p
Step-by-step explanation:
Available coins that are less than 11p: 1p 2p 5p 10p
11p with two coins ⇒ 1p + 10p only
11p with three coins ⇒ 1p + 5p + 5p only
11p with three coins ⇒ 2p + 2p + 2p + 5p only
Therefore, the seven coins that Luke has are:
1p 2p 2p 2p 5p 5p 10p
This is what the questions/answers say for #16-19 or last picture if you can't read it, please answer all questions
16. The number of hours of sunlight in a particular location S(t) can be modeled by the function S of t equals 12 plus 2 times the sine of the quantity 2 times pi over 365 times t end quantity comma where t is the number of days after January 1st. (That is, t = 0 means January 1st.) After how many days will there be 12 hours of sunlight for the first time during the year?
365 over 4 days
365 over 2 days
1095 over 4 days
1095 over 2 days
17. A student was asked to prove the trigonometric identity tangent of one half times x plus cotangent of one half times x equals 2 times cosecant x period Which of the following could be the first step in proving the identity?
the quantity 1 minus cosine x end quantity over sine x plus sin x over the quantity 1 minus cosine x end quantity equals 2 times cosecant x
sine x over the quantity 1 plus cosine x end quantity plus the quantity 1 plus cosine x end quantity over sine x equals 2 times cosecant x
the quantity 1 minus cosine x end quantity over sine x plus the quantity 1 minus cosine x end quantity over sine x equals 2 times cosecant x
I only
II only
I and II only
I, II, and III
18. Based on the graph of the trigonometric functions f (θ) = 4sin θ + 1 and g (θ) = cos 2θ, at what value(s) on the interval [0, 2π) does f (θ) = g (θ)?
0, π
pi over 2 comma 5 times pi over 2
5 times pi over 4 comma 7 times pi over 4
pi over 4 comma 3 times pi over 4 comma 5 times pi over 4 comma 7 times pi over 4
19. Which of the following shows a graph of a tangent function in the form y = atan(bx − c) + d, such that b = 2?
Problem 9 (#16)
In order to figure out when the amount of sunlight becomes 12 hours for the first time, we need to have [tex]S(t)=12[/tex] and solve the function for [tex]t[/tex]:
[tex]\displaystyle S(t)=12+2\sin\biggr(\frac{2\pi}{365}t\biggr)\\\\12=12+2\sin\biggr(\frac{2\pi}{365}t\biggr)\\\\0=2\sin\biggr(\frac{2\pi}{365}t\biggr)\\ \\0=\sin\biggr(\frac{2\pi}{365}t\biggr)\\\\\pi=\frac{2\pi}{365}t\\\\365\pi=2\pi t\\\\\frac{365}{2}=t[/tex]
Thus, B is the correct answer
Problem 10 (#17)
Recall the half-angle identity [tex]\displaystyle \tan\frac{x}{2}=\frac{1-\cos x}{\sin x}=\frac{\sin x}{1+\cos x}[/tex]Hence, [tex]\displaystyle \cot\frac{1}{2}x=\frac{1}{\tan\frac{1}{2}x }=\frac{\sin x}{1-\cos x}=\frac{1+\cos x}{\sin x}[/tex]So, you could techincally say that the first two options work as each function has their respective identities true for each option.
Thus, I and II is the correct answer
Problem 11 (#18)
[tex]f(\theta)=g(\theta)\\\\4\sin\theta+1=\cos2\theta\\\\4\sin\theta+1=1-2\sin^2x\\\\2\sin^2\theta+4\sin\theta=0\\\\2\sin\theta\bigr(\sin\theta+2)=0[/tex]
[tex]\displaystyle 2\sin\theta=0\\\\\sin\theta=0\\\\\theta=\{0,\pi\}[/tex]
[tex]\sin\theta+2=0\\\\\sin\theta=-2[/tex]
The solution is indeterminate since -2 does not fall in the range of [tex][-1,1][/tex].
Thus, A is the correct answer
Problem 12 (#19)
Recall that the period of a tangent function [tex]y=a\tan(bx-c)+d[/tex] is [tex]\frac{\pi}{|b|}[/tex]. Hence, if [tex]b=2[/tex], then the period of the tangent function is [tex]\frac{\pi}{2}[/tex]. Since I can't see the graphs, you need to identify which graph has a period of [tex]\frac{\pi}{2}[/tex] (meaning the distance between two vertical asymptotes is pi/2), or post this problem again with the graphs.
how many solutions does this system of equations have?
x-4y= -20
x-4y = -8
Answer:
Infinitely many
Step-by-step explanation:
Same slope, DIfferent Y-intercept
Help pls I will give brainliest
Answer:
12cm
Step-by-step explanation:
This is a problem which can be solved with the pythagoras therom.
[tex]a^{2} +b^{2} =c^{2}[/tex]
Plus we can split this triangle into two triangles.
The split triangle has dimensions of 13(bc) by 5 cm(dc).[tex]a^{2} +b^{2} =c^{2}[/tex]
[tex]5^{2} +b^{2} =13^{2}[/tex]
Now we solve for b which is the lenght of bd
[tex]25 +b^{2} =169[/tex]
[tex]b^{2} =144[/tex]
[tex]b = \sqrt{144}[/tex]
[tex]b = 12[/tex]
Therefore the lenght of bd is 12cm
Hope this helps! :)
what is the digit 9 in this number 195,487
Answer: Is in the 10 thousands place 4
Step-by-step explanation: 100,000 90,000 400 80 7
Answer:
In this case the number 9 would be located in the tens of thousands.
---
Thank you so much for participate in the community of Brainly.com
I hope help you :)
Kind regards, Antonio.
Jackson deposited $6,000 at 2.8% interest, compounded continuously, when he was 28 years old. How much will be in the account when he is 40 years old if he made no other deposits or withdrawals? Use the
continuous compound interest formula. (Do not use commas.)
The amount that would be in the account when Jackson is 40 years old with continuous compounding is $74,044.49.
What is the future value of the account?The formula for calculating future value when there is continuous compounding is : A x e^r x N
Where:
A= amount e = 2.7182818 N = number of years : 40 - 28 = 12r = interest rate$6000 x e^0.028 x 12 = $74,044.49
To learn more about continuous compounding, please check: https://brainly.com/question/26476328
#SPJ1
How would you make the approximate probability values very close to the actual probability values? pa help, step by step explanation ):
Answer:
Using the exact probabilities from the binomial we can find the probability of obtaining 18 or more successes out of 20 trials.
hope it helps!
(-5, -1), 6
Write an equation of a circle with the given center & radius
Step-by-step explanation:
The equation of a circle with the given center and radius.
center = (-5,-1) and radius is 6
x²-y²-10x-2y-6=0.
What is the equation of circle?
The equation of the circle is the equation which is used to represent the circle in the algebraic equation form with the value of center point in the coordinate plane and measure of radius.
The standard form of the equation of the circle can be given as,
Here (h,k) is the center of the circle and (r) is the radius of the circle.
The equation of a circle with the given center and radius. center (-5,-1) and radius 6 has to be written. Use the above equation,
Thus, the equation of a circle with the given center and radius.
center (-5,-1) and radius is 6
x²-y²-10x-2y-6=0.
The fraction strip shown below is shaded to represent dam fraction which fraction strip is shaded to represent a fraction equal to the fraction strip shown above
Answer:shade 2 strips out of 4 to get fraction strip equivalent to Mandy's fraction strip
Step-by-step explanation:
I WILL GIVE 20 POINTS TO THOSE WHO ANSWER THIS QUESTION RIGHT NOOOO SCAMS AND EXPLAIN WHY THAT IS THE ANSWER
Answer:
Read explanation.
Step-by-step explanation:
The dilation is by a sf (of 6)
This means that to find P'Q', you do 3*6 which is 18
To find N'Q, you do 9*6 which is 54.
Agan Interior Design provides home and office decorating assistance to its customers. In normal operation, an average of 2.2 customers arrive each hour. One design consultant is available to answer customer questions and make product recommendations. The consultant averages 12 minutes with each customer. (a) Compute the operating characteristics of the customer waiting line, assuming Poisson arrivals and exponential service times. (Round your answers to four decimal places. Report time in hours.)
The operating characteristics of the customer waiting line shows that the average service rate per hour is 5 customers per hour.
How to compute the operating characteristics?The average service rate per hour will be:
= 60/12 = 5
The average number of customers waiting will be:
= (2.2)²/5(5 - 2.2)
= 4.84/14
= 0.3457
The average number of customers in the system will be:
= 0.3457 + 2.2/5
= 0.7857
The average time that a customer spends waiting in the system will be:
= 0.3457/2.2
= 0.1571
Learn more about waiting line on:
https://brainly.com/question/4463118
Marlon has 2 gallons. how many cups of juice does he have?
Answer: Marlon would have 32 cups of juice
Step-by-step explanation:
Since there are 16 cups in one gallon, you simply multiply 16 by 2, to get your answer of 32 cups.
10 ft
12 ft
15 ft
surface area:
volume :
Answer:
Step-by-step explanation:
Not enough information given in your question to provide an answer.
The original price of a phone was reduced by $200.
If p = the phone's original price in dollars, which algebraic expression
represents the reduced price?
A. p- 200
B. 200 + p
C. 2002
D. 200-P
Let U={x: x is an integer and 2≤x≤10}. In each of the following cases, find A,B and determine whether A⊆B,B⊆A, both or neither: A={x: 2x+1>7},B={x: x^2>20}. A={x:x^2-3x+2=0},B={x:x+7 is a perfect square}.
A is not a subset of B but B is a subset of A (that is can be found in A) that is B⊆A is correct
Set theorySet is defined as the arrangement of elements. They can be represented using the venn diagram.
Given the following sets
U = {x: x is an integer and 2≤x≤10} = {3, 4, 5, 6, 7, 8, 9}
A = {x: 2x+1>7} = {x > 3}
B={x: x^2>20} = {x >± 20}
From the set, can see that A is not a subset of B but B is a subset of A (that is can be found in A) that is B⊆A is correct
Learn more on sets here: https://brainly.com/question/13458417
C D
5
What is the slope of the equation Y =
7
-42
0-7
7
4
54
05
Answer:
The answer is:
[tex] \frac{5}{4} [/tex]
Step-by-step explanation:
Because In the equation y=mx+b, m is always the slope.
which is the graph of the linear equality x-2y>-12?
[tex]x - 2y > - 12[/tex]
[tex] - 2y > - x - 12[/tex]
[tex]2y < x + 12[/tex]
[tex]y < \frac{x}{2} + 6[/tex]
[tex]plot \: the \: line \: of \: eq \: y = \frac{x}{2} + 6[/tex]
Now to find the solution for the inequality, let's substitute 1 point in the inequality.Consider O(0,0)[tex]0 < \frac{0}{2} + 6[/tex]
[tex]0 < 6 \\ true[/tex]
The region that contains the point O(0,0) is the accepted part.Your answer is the last/first one.Help please! I need help!!!!
Evita is solving the system of equations shown using the elimination method. first equation: 3x + 8y = 20 second equation: 5x – 2y = 4 - What operation will eliminate one of the variables?
A. multiply the first equation by 2
B. multiply the first equation by 4
C. multiply the second equation by 2
D. multiply the second equation by 4
Answer:
D. multiply the second equation by 4
Step-by-step explanation:
3x + 8y = 20 __ equation 1
5x – 2y = 4 ___ equation 2
multiply the second equation by 4
3x + 8y = 20 __ equation 1
20x – 8y = 16 ___ equation 2
============
23x = 36
x = 36/23
y = (4-5x)/-2
y = (4-5(36/23))/-2
y = 44/23
Solve the equation by factoring. (Enter your answers as a comma-separated list. Let k be any integer. Round terms to three decimal places where appropriate. If there is no solution, enter NO SOLUTION.)
2 cos() tan() + tan() = 1 + 2 cos()
Answer:
What are the numbers in the parentheses?
12. Make a box-and-whisker plot of the data. (1 point)
20, 23, 28, 14, 13, 24, 18, 11
O
10 12 14 16 18 20 22 24 26 28 30
10 12 14 16 18 20 22 24 26 28 30
O
.
.
10 12 14 16 18 20 22 24 26 28 30
.
10 12 14 16 18 20 22 24 26 28 30
The box-and-whisker plot of the data, showing the five-number summary, is shown in the image atatched below.
What is the Box-and-whisker Plot?The box-and-whisker plot is a plot that displays the minimum, maximum, median, lower and upper quartile of a data, which is termed as the five-number summary of a data.
Given the data, 20, 23, 28, 14, 13, 24, 18, 11, find the five-number summary:
Minimum - 11Lower Quartile - 13.5Median - 19Upper Qaurtile - 23.5Maximum - 28Therefore, the box-and-whisker plot of the data, showing the five-number summary, is shown in the image atatched below.
Learn more about box-and-whisker ploton:
https://brainly.com/question/12343132
?? i just need help with this question in the photo..
Answer:
D
Step-by-step explanation:
3. Select all expressions equivalent to x-5.
Copied for free from openurresources.org
Select all that apply:
A. x+(-5)
OB. X-(-5)
nc. -5+x
OD. -5-x
DE. 5-X
OF. -5-(-x)
OG. 5+x
Submit Answer
A dog won a race at the local fair by running 7 1/4 miles in exactly 2 hours. At this constant rate, how long does it take the same dog to run the 26 1/10 mile state fair race? Use ratio reasoning to solve. Use the unit rate found below.
Answer:
7.2 hrs
Step-by-step explanation:
26.1 / 7.25 * 2 =
The function y= sin 2 (x - 1/2) has a period of?
Answer:
I believe the period is 1. Because if it was y= sin2 (2(x-1/2) then the period would be 2.
Help 3837373737383333
Answer:
6/11
Step-by-step explanation:
count how many numbers there are 11
count how many numbers you have that are less than 4 or odd
put that number over the total
simplify if possible
21 = r -5
=
HOW DO WE SLOVE THIS
Answer:
R = 26.
Step-by-step explanation:
The way to solve this is to add 5 to both sides.
r=4.2
It may show subtraction but it is division, 21÷5=4.2
Sharon wants to buy a shirt that costs $25. The sales tax is 5%. How much is the sales tax? What is her total cost for the shirt?
Answer:
Price before Taxes: $ 25.00
+ Sales Tax (5%):$ 1.25
Total Price with Tax:$ 26.25
A store is having a Black Friday sale where all electronics are 20% off. Jessica also has a one-time use
coupon for 15% off. If Jessica received both discounts and paid $108.80 for a pair of headphones, what was
the original price of the headphones?
WILL GIVE BRAINLIEST
Step-by-step explanation:
20+15=35%
to find the original price all we have to do is use the formula-
original price = sale price / (1 - percent off/100)
original price = 108.80 / (1 - 35/100)
original price = 167.3846...
original price = 167.38
hope this helps you :D