Answers
Answer:
49
Step-by-step explanation:
Work is shown in the image
Related Questions
Solve the quadratic equation by using either a numeric or a graphic approach.
x2 - 12x – 144 = 0
a. x= -12.4 or x = -7.4
c. x = 9.4 or x = -7.5
b. x = 19.4 or x = -7.4
d. x = 9.4 or x = -3.4
Answers
Answer:
B
Step-by-step explanation:
Calculate the work done.
A crane lifts 5,000 newtons to the top of a roof which is 6 meters high.
Answers
Answer:
30, 000 Nm
Step-by-step explanation:
F = mg = 5000 N
h = 6 m
Work done
W = mgh = 5000*6= 30, 000 Nm
Answer:
30000 nm
Step-by-step explanation:
The state education commission wants to estimate the fraction of tenth grade students that have reading skills at or below the eighth grade level. Step 2 of 2 : Suppose a sample of 292 tenth graders is drawn. Of the students sampled, 240 read above the eighth grade level. Using the data, construct the 80% confidence interval for the population proportion of tenth graders reading at or below the eighth grade level. Round your answers to three decimal places.
Answers
Answer:
The 80% confidence interval for the population proportion of tenth graders reading at or below the eighth grade level is (0.149, 0.207).
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of [tex]\pi[/tex], and a confidence level of [tex]1-\alpha[/tex], we have the following confidence interval of proportions.
[tex]\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]
In which
z is the zscore that has a pvalue of [tex]1 - \frac{\alpha}{2}[/tex].
Suppose a sample of 292 tenth graders is drawn. Of the students sampled, 240 read above the eighth grade level.
So 292 - 240 = 52 read below or at eight grade level, and that [tex]n = 292, \pi = \frac{52}{292} = 0.178[/tex]
80% confidence level
So [tex]\alpha = 0.2[/tex], z is the value of Z that has a pvalue of [tex]1 - \frac{0.2}{2} = 0.9[/tex], so [tex]Z = 1.28[/tex].
The lower limit of this interval is:
[tex]\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.178 - 1.28\sqrt{\frac{0.178*0.822}{292}} = 0.149[/tex]
The upper limit of this interval is:
[tex]\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.178 + 1.28\sqrt{\frac{0.178*0.822}{292}} = 0.207[/tex]
The 80% confidence interval for the population proportion of tenth graders reading at or below the eighth grade level is (0.149, 0.207).
Use a t-distribution to answer this question. Assume the samples are random samples from distributions that are reasonably normally distributed, and that a t-statistic will be used for inference about the difference in sample means. State the degrees of freedom used. Find the endpoints of the t-distribution with 5% beyond them in each tail if the samples have sizes ni = 8 %3D and 11 n2 Enter the exact number for the degrees of freedom and round your answer for the endpoints to two decimal places. degrees of freedom = endpoints
Answers
Answer:
i think it 36 sorry if it wrong tho have a nice day
Step-by-step explanation:
write the image of a point ( 3 - 2) under reflection about x - axis
Answers
Step-by-step explanation:
I m not sure either u have written (-2).. ans is (3,-2)
Answer:
(3, 2 )
Step-by-step explanation:
Under a reflection in the x- axis
a point (x, y ) → (x, - y ) , then
(3, - 2 ) → (3, 2 )
I need to know the x and y
Answers
Answer:
36^7/12=6 y/x
Step-by-step explanation:
im not sure for the rest of it
To rent a certain meeting room a college charges a reservation of $47 and an additional fee of $7.90 per hour the film club wants to spend less than $86.50 on renting the meeting room what are the possible amount of time for which they could rent the meeting room used T for the number of hours in meeting room is rented and solve your inequality for T
Answers
Answer:
9 hours.
Step-by-step explanation:
31 + 5.9*t < 84.10.
To solve it, collect the constant terms on the right side:
5.9*t < 84.10 - 31 = 53.10,
Hence, t < 53.10%2F5.9 = 9 hours.
can someone plz help
Answers
Jessica begged her parents for a new bike for months before her birthday. On her birthday, her parents presented her with a shiny silver
bike Jessica was so excited that she told her parents she'd cherish the bike forever. She rode her bike every day and wouldn't let anyone else touch
it
What does cherish mean?
O 1. remember
0 2. share
3 treasure
4 watch
Answers
Your answer is 1. remember
Find the area of rectangle ABCD
Answers
Answer: 12
Step-by-step explanation:
You can find the area of a rectangle that forms around it, and then subtract the little extra triangles. You can form a 5 by 5 square around the points. There are 4 extra little triangles. Two of them have a base and height of 2 and 2. Two of them have a base and height of 3 and 3. So you get the total area of those 4 triangles to be: 2+2+4.5+4.5=13. So 25-13=12.
Can someone help me please?
Answers
9515 1404 393
Answer:
10 inches
Step-by-step explanation:
Use the formula for the area of a trapezoid. Fill in the given information and solve for the unknown.
A = 1/2(b1 +b2)h
50 in² = (1/2)(3 in +7 in)h
50 in²/(5 in) = h . . . . . . . . . . divide by the coefficient of h
10 in = h
The height of the trapezoid is 10 inches.
Write 0.59 as a fraction in simplest form.
A
59
1000
O
B
100
59
c
59
100
D. 59
10
HURRY
Answers
Answer:
C. 59/100
Step-by-step explanation:
The two pyramids below are similar. What is the length of the altitude of the
smaller pyramid?
Answers
Answer:
B is the correct answer........
Step by step solution:
5/2=x/3
3*5/2=x
15/2=x
So the answer is D
Plz I need your help
Answers
Need help ASAP plz !!!!!
Answers
Answer:
yep that is correct!
Step-by-step explanation:
Theorem of Pythagoras
hopefully the picture is clear and understandable!
:)
Plz help me well mark brainliest if correct!.,....
Answers
Answer:
6cm
Step-by-step explanation:
I did 24 divided by 4 since a square has 4 sides
What number is ten less than 658?
Answers
Answer:
648 is the answer
Step-by-step explanation:
658-10=648
The formula S=C(1+r)^t models inflation, where C= the value today, r= the annual inflation rate (in decimal form), and S= the inflated value t years from now. If the inflation rate is 4%, use the formula to find out how much a house now worth $183,000 will be worth in 15 years. Round your answer to the nearest dollar.
Answers
Answer:
area = b+h / lengthxwidth
Step-by-step explanation:
The slope of the line below is -0.75. Write the equation of the line in point-
slope form, using the coordinates of the labeled point. Do not use parenthesis
on the y side.
(2, -1)
Answers
I hope it helps you and good luck in the quiz :)
Edgar has a bag of 10 marbles (3 green, 5 blue, and 2 red). If he picks one marble out of the bag at random, what’s the probability that he will get a blue marble? Explain how you determined that probability.
Answers
There are 5 blue marbles and 10 total marbles.
The probability of picking blue is the number of blue marbles/ total marbles.
Probability = 5/10 which reduces to 1/2
The answer is 1/2
what is the difference between solid and hollow cone?
Answers
Answer:
https://youtu.be/wmQMBJ_ce3k see this video
the value of y is directly proportional to the value of x. if y =35 when x=140, what is the value y when x=70
Answers
Answer:
17.5
Step-by-step explanation:
35÷y = 140 ÷ 70
or, 35 = 2y
or, y= 17.5
your savings account pays 2.5% interest per year. How much interest does the account pay per month
Answers
Answer:
0.209 x 12 is that answer but their really is no answer because i have tried about every way i can think of to get the answer so yeah sorry
Step-by-step explanation:
brainliest pls
A pharmaceutical sale representative gets paid $50,000 annually plus 3.5% commissions on total sales. This year he sold $420,000 in pharmaceuticals. What are his annual total earnings? someone help pls
Answers
Answer:
[tex] \frac{3.5}{100} \times 420000 = 14700commission \\ total \: earnings = 50000 + 14700 \\ = 64700[/tex]
ANSWER ASAP! WILL MARK BRAINLIEST!
Select all the correct answers.
Which two tables represent the same function?
х|у
4|8
6|7
х|у
4|5
6|4
х|у
2|8
8|5
x|y
2|10
6|14
x|y
2|9
8|6
Answers
Answer:
The first and last set
y = (-1/2) + 10
Step-by-step explanation:
Two points form a line
The first and last set have a slope of -1/2
and b intercept of 10
х|у
4|8
6|7
y = (-1/2) + 10
and
x|y
2|9
8|6
y = (-1/2) + 10
The requried, tables that represent the same function are tables 1 and 3.
What is function?In mathematics, a function is a relationship between two sets of numbers, known as the domain and range, in which each element in the domain is associated with exactly one element in the range.
Here,
The tables that represent the same function are:
x|y
4|8
6|7
x|y
2|8
8|5
For two tables to represent the same function, they must have the same output for the same input. In the first table, input 4 gives output 8 and input 6 gives output 7. In the second table, input 2 gives output 8 and input 8 gives output 5. Therefore, these two tables represent the same function.
The other tables do not represent the same function, as they have different outputs for the same input values.
Learn more about function here:
brainly.com/question/21145944
#SPJ7
Some one help will give brain
Answers
Answer:
what the link? didfbdsfaahsdfhsd
Step-by-step explanation:
a man swims for 30 mins at a speed of 109 m/min. How far does he swim?
Answers
The distance is meters per minute so you would multiply the distance per minute by total minutes:
109 x 30 = 3.270 total meters.
1 km = 1000 meters
3,270 meter/ 1000 meters per km = 3.27 km
They swam 3.27 km
Which graph represents exponential decay?
80
80
80
180
80
60
60
40
60
40
20
90
40
20
20
20
2.
2
3
3
2 3
e
Answers
Answer:
d
Step-by-step explanation:
line segment AB is a directed segment with endpoints A(2,2) and B(14,14). In two or more complete sentences, explain how you would verify that Point X, with a coordinate of (6,6), divides line segment AB in a 1:2 ratio?
Answers
Answer: Section formula
Step-by-step explanation:
Given
The line segment AB with endpoints [tex]A(2,2)[/tex] and [tex]B(14,14)[/tex] is divided by a point X in the ratio 1:2
To verify that X divides the line segment in the ratio 1:2, we will use section formula. Section formula tells the coordinates of the point which divide the line segment in the certain ratio or vice-versa.
We will assume that X divides AB in k:1 and insert the values in the section formula. If the ratio k:1 comes out to be 1:2, then it verifies the claim.
Given a circle with a circumference of 30pi inches, solve for the exact area of a sector in terms of pi, whose central angle is one-fifth of the measure of the
circle.