If f(x) = 2x+ 1, then f(3) =
i cant really seem to understand how to work it out.
Answer:
f(3) = 7
Step-by-step explanation:
f(x) = 2x + 1
f(3) = 2(3) + 1
f(3) = 6 + 1
Substitute the 3 in for x.
f(3) means that x is equal to 3.
This just means we substitute the value of 3 into the f(x) = 2x+ 1 to get
f(x) = 2(3)+ 1,
f(3) = 2(3)+ 1,
f(3) = 6+ 1,
f(3) = 7
Help me please??ndjfbd
Answer:
A
Step-by-step explanation:
Becuase the proability of drawing a red marble is 10/20 or 50% and drawing a green marble is 4/20 or 20% and drawing a red marble is 6/20 or 30%
what the perimeter and area of this shape?
Answer:
P = 55 feet
A = 237 sq feet
Step-by-step explanation:
P = 2(4) + (3.14 x 15)
A = (4 x 15) + (3.14 x 7.5²)
Find the base of a parallelogram with area of 24 and height of 3 3/4
Answer:
base = 6.4 units or 6 2/5
Step-by-step explanation:
area = bh
24 = b(3.75)
b = 6.4 units or 6 2/5
Answer:
6.4
Step-by-step explanation:
Area = base x height
if height = 3.75 or 3 3/4
Divide
24 ÷ 3.75 = 6.4
base = 6.4
Gabrielle is 9 years younger than Mikhail. The sum of their ages is 75 . What is Mikhail's age?
Answer: We know Gabrielle is 9 yrs younger than Mikhail hence it will be x-9 yrs. Sum of their ages is 87. Mikhail's age is 48 yrs.
HOPE THIS HELPS
PLS HELP DUE VERY SOON
3. Consider the following box plot.
(a) Find the interquartile range.
(b) What percent of values is included in the interquartile range?
Answer:
a. IQR = 2.25
b. 40%
(I'm not sure about B.)
Step-by-step explanation:
a.=Q3 - Q1
=4.7 - 2.2
=2.5
b. =2/5 × 100/1
=40%
Find the value of each trigonometric ratio.
Cos C
Help please
sinx=p/h -----> some people have
cosx=b/h ----> curly brown hair
tanx=p/b -----> through proper brushing
easy way to remember it
we need cos c for this
h= 26 which is always the longest side of the triangle
b= 10
p=24
these both can be switched depending on which angle the question is talking about in this case its angle C so 10 is the base, if it was angle a 24 would have been the base
[tex]cosC=\frac{10}{26} \\[/tex]
y=x^2+14x+3
what’s (x,y)
Answer:
(-7, -46)
Step-by-step explanation:
Which number line shows all the values of a that make the inequality - 3x +1 < 7 true?
Answer:
Third option
Step-by-step explanation:
The monthly cost for 46 minutes of calls is 12.75. What is the monthly cost for 52 minutes of calls?
Answer:
$14.41
Step-by-step explanation:
set up a proportion then cross-multiply:
12.75 / 46 = x / 52
46x = 663
x = 14.41
Yo please help me!
First image answer choices for all questions
2nd image the questions
Answer:
Step-by-step explanation:
P' (2,4)
Q' (4,4)
M' (2,1)
K' (4,1)
Battery life for a hand-held computer is normally distrituted and has a population standard deviation of 7 hours. Suppose you need to estimate a confidence interval estimate at the 95% level of confidence for the mean life of these batteries. Determine the sample size required to have a margin of error of 0.585 hours. Round up to the nearest whole number.
Answer:
A sample size of 551 is required.
Step-by-step explanation:
We have that to find our [tex]\alpha[/tex] level, that is the subtraction of 1 by the confidence interval divided by 2. So:
[tex]\alpha = \frac{1 - 0.95}{2} = 0.025[/tex]
Now, we have to find z in the Ztable as such z has a pvalue of [tex]1 - \alpha[/tex].
That is z with a pvalue of [tex]1 - 0.025 = 0.975[/tex], so Z = 1.96.
Now, find the margin of error M as such
[tex]M = z\frac{\sigma}{\sqrt{n}}[/tex]
In which [tex]\sigma[/tex] is the standard deviation of the population and n is the size of the sample.
Population standard deviation of 7 hours.
This means that [tex]\sigma = 7[/tex]
Determine the sample size required to have a margin of error of 0.585 hours.
This is n for which M = 0.585. So
[tex]M = z\frac{\sigma}{\sqrt{n}}[/tex]
[tex]0.585 = 1.96\frac{7}{\sqrt{n}}[/tex]
[tex]0.585\sqrt{n} = 1.96*7[/tex]
[tex]\sqrt{n} = \frac{1.96*7}{0.585}[/tex]
[tex](\sqrt{n})^2 = (\frac{1.96*7}{0.585})^2[/tex]
[tex]n = 550.04[/tex]
Rounding up(as for a sample of 550 the margir of error will be a bit above the desired target):
A sample size of 551 is required.
A sports ball has a diameter of 18 cm find the volume of the ball
Answer:
volume= 3054.86cm^3
Step-by-step explanation:
Pls Need Help! Thank you
Answer:
y = [tex](\frac{1}{2})^{-x} +4[/tex]
Step-by-step explanation:
In order to achieve the following transformation we need to do the following. To get the graph to be reflected accross the y-axis we need to change the sign of the x variable. Since the x-variable in this scenario is a positive we would change it to a negative. Next, we want to shift the graph 4 units up. To do this we simply need to add 4 to the entire equation. This would result in the following equation.
y = [tex](\frac{1}{2})^{-x} +4[/tex]
Both of these graphs can be seen in the image below.
Hannah claims that people who live in southern states spend 9 hours more per week outside than do people in northern states. She selects a random sample from each group. The mean number of hours per week that people in southern states spent outside is 18.6, and the mean number of hours per week that people in northern states spent outside is 14.4. A 99 percent confidence interval to estimate the difference in population means (southern minus northern) is (0.4,8.0).
Answer: Hello your question is incomplete below is the missing part
Which of the following statements about Hannah’s claim is supported by the interval?
A) Hannah is likely to be incorrect because the difference in the sample means was 18.6−14.4=4.218.6−14.4=4.2 hours.
B) Hannah is likely to be incorrect because 9 is not contained in the interval.
C)The probability that Hannah is correct is 0.99 because 9 is not contained in the interval.
D)The probability that Hannah is correct is 0.01 because 9 is not contained in the interval.
E)Hannah is likely to be correct because the difference in the sample means (18.6−14.4=4.2)(18.6−14.4=4.2) is contained in the interval.
Answer : Hannah is likely to be incorrect because 9 is not contained in the interval. ( B )
Step-by-step explanation:
The statement that is supported by the interval in Hannah's claim is that
Hannah is likely to be incorrect because 9 is not contained in the interval.
please answer with explanation
Answer:
5
Step-by-step explanation:
You need to add the bowls and vases. You get 20. Then you divide to get one quarter of then and get 5.
ARITHMETIC SEQUENCES, what comes next after -2/25? I will Mark you as BRAINLIEST pls help
Answer:
26/5
Step-by-step explanation:
an=a1+(n-1)d
d is common difference
so,
2/5- (-2)=12/5
putting values in above formula
=-2+(4-1)(12/5)
=-2+3(12/5)
=-2+(36/5)
=26/5
1. The cost of using a telephone in a hotel meeting room is $0.20 per minute. Which of the
following equations represents the total cost, c, in dollars for h hours of phone use?
a c= 0.20(60h)
b c= 0.20 + 60
d =
Answer:
A is correct
Step-by-step explanation:
[tex]\frac{0.20}{1min}[/tex] = [tex]\frac{12.00\\}{1 hour}[/tex]
We can scale the ratio to give the most accurate answer.
0.20 X 60 = 12.00
*pls give brainlist*
Question
Question: 1-1
AACPS Geometry Standard Assess Q3 20-21 ONLINE
Selected Response: 1 point for answer only.
Examine the figure below
Note: Figure
not drawn to
scale.
The Mars Rover Curiosity is sending signals that it is driving into a crater at an angle of depression of 53º.
If the rover covers a horizontal distance of 110 meters, what vertical distance has it traveled? Round your answer to the nearest thousandth.
O 137.735 meters
82.891 meters
87.850 meters
145.975 meters
Constructed Response: Work and answer will be scored on a 3 point rubric. Please answer in the space provided.
After conducting a few experiments, the rover completes its journey by exiting the crater at a different location from where it entered. The rover travels up and out
Pause
Next
e
A local baseball team is struggling this season, and many fans of the team believe it may be time to replace the head coach. To estimate support for firing the current head coach, a television news station provides a link on its website where fans of the team can respond to the question: "Do you feel the current head coach should be fired?" After 2,367 votes on the website, 79% of those who responded felt the coach should be fired. Which of these describes the type of bias in this survey and a likely direction of the bias in estimating overall support for firing the coach?
A) This is nonresponse bias. The result overestimates true support for firing the coach.
B) This is nonresponse bias. The result underestimates true support for firing the coach.
C) This is voluntary response bias. The result overestimates true support for firing the coach.
D)This is voluntary response bias. The result underestimates true support for firing the coach.
Answer:
Option A
Step-by-step explanation:
Here in this case the respondents differ from the non respondents in more than one ways and hence this results to a nonresponse bias due to which there is an extra thumbs up in support of firing the coach thereby leading to an over estimated number.
Hence, option A is correct
Find the distance between the points (6, -2) and (9,4)
help me..............
Answer:
b
Step-by-step explanation:
Answer: 6.30
Step-by-step explanation:
4 and below let it go, five and above give it a shove
The 5 in the thousandths place tells us that we need to raise the 9 in the hundredths place to 10, so we have to carry the 1 to the tenths place and add 2 + 1
6.295
6.30
I need the volume asap please homework due in 10mins question is a sphere has the inside of it a 9 so what's the volume
Answer:
Step-by-step explanation:
The volume should be 9 to the second power times 4×3.14
18 is 32% of what number w
Answer:
56.25
Step-by-step explanation:
100% of 56.25 is 56.25, therefore 32% of 52.25 equals 18
A group of people move a large box that weighs 90 Newtons, 10 meters in 20 seconds, how much power was used?
Answer:
P = 45 W
Step-by-step explanation:
Given that,
The weight of a box, W = 90 N
Distance moved, d = 10 m
Time, t = 20 s
We need to find the amount of power used. The rate of doing work is called power It can be calculated as the formula,
[tex]P=\dfrac{W}{t}\\\\P=\dfrac{Fd}{t}\\\\P=\dfrac{90\times 10}{20}\\\\P=45\ W[/tex]
So, 45 W of power was used.
Need Help ASAP..
Don't put the link or you will get reported and ill reach out to brainley.
Answer:
5
Step-by-step explanation:
1,1,3,4,4,5,6,6,6,7,9
/ / / / / / / / / /
The answer is 5
Evaluate 2x3 - 3x2 + 4 for x = - 2.
Answer:
0 or 1.110838652
Step-by-step explanation:
cylinder with radius of 5 and height of 4 surface area
Answer:
answer attached
Step-by-step explanation:
Solve for t. t - 5/ 6 = 5/ 6
Answer:
t = 0
Step-by-step explanation:
Answer:
t = 5/3
Step-by-step explanation:
t - 5/ 6 = 5/ 6
t = 5/6 + 5/6
t = 10/6
t = 5/3
A root of the equation x^3-x-11=0 correct to four decimal places using bisection method is...?
