Answer:
Step-by-step explanation:
circle 2 is a dilation of circle 1 with a scale factor of 5
Answer:
Circle 2 is a dilation of circle 1 with a scale factor of 5.
Step-by-step explanation:
Verified by correct test results
a living room floor consists of an area and hardwood. the area of the rug is 187 square feet. what is the area of the entire living room. (i'm attaching a picture for the rest of the problem) 20 points and brainliest if you answer correctly.
Answer:
x = 20 ft
Area of the living room = 400 ft²
Step-by-step explanation:
From the picture attached,
Length of rug = (x - 3) ft
Width of the rug = (x - 9) ft
Area of the rectangular rug = Length × Width
= (x - 3)(x - 9)
187 = (x - 3)(x -9)
187 = x² - 12x + 27
x² - 12x - 160 = 0
x² - 20x + 8x - 160 = 0
x(x - 20) + 8(x - 20) = 0
(x - 20)(x + 8) = 0
x = -8, 20
Since, measure of 'x' can't be negative, measure of x will be 20 ft.
Therefore, area of the square living room = x²
= (20)²
= 400 ft²
Find the area. HELP ME PLEASEEEEEEEEEEEEEEEEEEEEEEEee
Answer:
area = 132 cm²
Step-by-step explanation:
area of rectangle = 7 x 12 = 84
area of one triangle = 8 x 6 x 0.5 = 24
total area = 84 + 24 + 24 = 132 cm²
Find the value of x please will mark brainlyiest
Answer:
D) x = 8
Step-by-step explanation:
The information given states that ABCD is similar to RSTU.
Line BC is similar to Line ST. ST is 2 times larger that BC.
Line AB is similar to Line RS. RS must be 2 times larger than AB as well, so multiply 4 x 2 to get x = 8.
Hope it helps!!!
What two numbers have a sum of -7 and a difference of 14?
Answer:
The sum of two numbers is 14 and their difference is 10
Step-by-step explanation:
"2 numbers (x and y)
x+y = 14
and x-y + 10
If you each equation by positive 2, one gets 2x+2y = 28 and 2x-2y = 20
The 'y-terms' cancel out or equal zero when adding, so 4x = 48, divide by 4 on each side and x or the first number equals 12.
Plug 12 back into the equation for 'x' and subtract 12 on both sides so that y=2
The difference of 12-2=10 and the addition of 12 and 2 equals 14"
hopes this helps
What is the slope of the line passing through points A and B?
someone please answer this!!
Answer:
x=8
Step-by-step explanation:
In an article in the Journal of Advertising, Weinberger and Spotts compare the use of humor in television ads in the United States and the United Kingdom. They found that a substantially greater percentage of U.K. ads use humor. (a) Suppose that a random sample of 400 television ads in the United Kingdom reveals that 147 of these ads use humor. Find a point estimate of and a 95 percent confidence interval for the proportion of all U.K. television ads that use humor. (Round your answers to 3 decimal places.) (b) Suppose a random sample of 455 television ads in the United States reveals that 119 of these ads use humor. Find a point estimate of and a 95 percent confidence interval for the proportion of all U.S. television ads that use humor. (Round your answers to 3 decimal places.) (c) Do the confidence intervals you computed in parts a and b suggest that a greater percentage of U.K. ads use humor
Answer:
a)
The point estimate is 0.368.
The 95 percent confidence interval for the proportion of all U.K. television ads that use humor is (0.321, 0.415).
b)
The point estimate is 0.262.
The 95 percent confidence interval for the proportion of all U.S. television ads that use humor is (0.222, 0.302).
c)
Yes, because the lower bound of the confidence interval for UK proportions is higher than the upper bound of the confidence interval for US proportions.
Step-by-step explanation:
(a) Suppose that a random sample of 400 television ads in the United Kingdom reveals that 147 of these ads use humor.
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].
Sample of 400:
This means that [tex]n = 400[/tex]
Point estimate:
[tex]\pi = \frac{147}{400} = 0.368[/tex]
The point estimate is 0.368.
95% confidence level
So [tex]\alpha = 0.05[/tex], z is the value of Z that has a pvalue of [tex]1 - \frac{0.05}{2} = 0.975[/tex], so [tex]Z = 1.96[/tex].
The lower limit of this interval is:
[tex]\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.368 - 1.96\sqrt{\frac{0.368*0.632}{400}} = 0.321[/tex]
The upper limit of this interval is:
[tex]\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.368 + 1.96\sqrt{\frac{0.368*0.632}{400}} = 0.415[/tex]
The 95 percent confidence interval for the proportion of all U.K. television ads that use humor is (0.321, 0.415).
(b) Suppose a random sample of 455 television ads in the United States reveals that 119 of these ads use humor.
Sample of 455:
This means that [tex]n = 455[/tex]
Point estimate:
[tex]\pi = \frac{119}{455} = 0.262[/tex]
The point estimate is 0.262.
95% confidence level
So [tex]\alpha = 0.05[/tex], z is the value of Z that has a pvalue of [tex]1 - \frac{0.05}{2} = 0.975[/tex], so [tex]Z = 1.96[/tex].
The lower limit of this interval is:
[tex]\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.262 + 1.96\sqrt{\frac{0.262*0.738}{455}} = 0.222[/tex]
The upper limit of this interval is:
[tex]\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.262 + 1.96\sqrt{\frac{0.262*0.738}{455}} = 0.302[/tex]
The 95 percent confidence interval for the proportion of all U.S. television ads that use humor is (0.222, 0.302).
(c) Do the confidence intervals you computed in parts a and b suggest that a greater percentage of U.K. ads use humor?
Yes, because the lower bound of the confidence interval for UK proportions is higher than the upper bound of the confidence interval for US proportions.
Can you please find the domain and range of the relation? And please explain if it is or is not a function.
1) Convert the following
following measurements into m
a) 290cm
b) 56200mm
c)4.7 km
d) 123dm
e) 0.8nm
Answer:
a)2.90m
c) 4700m
Step-by-step explanation:
I know answers for these only
please give brainliest
1. Diego has 75% of $10. Noah has 25% of $30. Diego thinks he has more money than Noah, but Noah thinks they have an equal amount of money. Who is right?
Select the correct choice.
Step-by-step explanation:
To find how much 75% we multiply 100 with 75 and divide it with 100
75 × 10 ÷ 100 = 7.5
we need to do same with Noah's money
25 × 30 ÷ 100 = 7.5 Noah is correct, they have same amount.
If you failed your math test due to being unprepared. What are 2 things that you could have done to prevent being unprepared for your test?
Answer:
go everything youve learnt from grade 3 come right up
Step-by-step explanation:
sometimes its knowing the simply formulas thatll get you through
Rewrite in simplest terms: (6x+10)+(−4x−3)?
Answer:
2x + 7
Step-by-step explanation:
Hi,
Combine like terms. 6x - 4x is 2x. 10 - 3 is 7.
Hope this helps :)
I accidentally clicked 4's answer (i dont know if it's right or not) so just forget that but do you guys know the answer to 4 and 5? I need to finish this assignment by today and I'm not good at this-
CAN SOMEONE PLEASE HELP ME WITH THIS ITS DUE TODAY :)))
PLEASE HELP ME WITH THE LITTLE QUESTION
Answer:
y = -x +2
Step-by-step explanation:
First let's find the slope.
(-1,3) and (4,-2)
3 - -2/ -1 - 4 = 5/-5 = -1
Slope = -1
Now let's use slope intercept form:
y1-y2=m(x1-x2)
Let's plug in our slope for m.
y1-y2= -1 (x1-x2)
And now let's substitute y2 and x2 for one of our points, I'll use (4,-2)
y1+2 = -1(x1- 4)
y= -x + 4 -2
y = -x +2
Help meh pls- 5x(20 divided by 4)to the power of 2
Answer:
125
Step-by-step explanation:
A cognitive psychologist is interested in whether increasing reading speed reduces comprehension. She has students complete a reading comprehension task before and after a six-week speed-reading course. In the beginning of the study, a randomly selected group of 81 students scored an average of 107 points on the reading comprehension task. Since the sample size is larger than 30, the cognitive psychologist can assume that the sampling distribution of MD is normal. She plans to use a repeated-measures t test. The cognitive psychologist identifies the null and alternative hypothesis as:
Answer:
H0: Ud >= 0
H1: UD < 0
Step-by-step explanation:
We have the sample size = 81
Mean of x = 107
The alpha level was not given for me to help you calculate further.
This researcher wants to know if increasing reading speed brings about a decrease in the comprehension of the reader.
The hypothesis are
Null hypothesis
H0: U >= 0
Alternative hypothesis
H1: U < 0
Thank you
Max has $300 in a savings account. He plans to withdraw $10 per week for lunch money. Which inequality
represents the number of weeks Max can withdraw money before his account will be less than $170?
Answer:
300-10w<170
subtract 300 from both sides
-10w<-130
divide by -10, because we are dividing a negative number the inequality sign changes
w>13
(brainlyest appreciated!)
can someone please help brainist
what is the area of the composite shape below?
Question 4(Multiple Choice Worth 3 points)
(06.06)
Which of the following shows 3+ (x + 6y) rewritten using the Associative Property of Addition?
O 3 + x + 6y
O 3x + (6 + y)
O x + (3 + 6y)
O (3 + x) + 6y
I need help ASAP
12. The quotient of x divided by six is eight.
13. 28 is four times the number x
Help!!!! lol
Answer:
12. x = 48
13. x = 7
Step-by-step explanation:
x/6 = 8
x = 8*6
x = 48
28 = 4x
28/4 = x
x = 7
Answer:
12) x/6 = 8
13) 28 = 4x
Write the quadratic equation in standard form:
2x – 1=-x^2
Answer: -x^2-2x-1
Step-by-step explanation:
whats 345 divided by 6
Answer:57.5
Step-by-step explanation:
057
6 345
0
34
30
45
42
3
u have a remainder of 3 so u add .5 to 57
Which values are the solutions to the inequality below? Check all that apply.
X^2 < 10
Answer:
3
Step-by-step explanation:
if you can't use calculator, you must know that after a number being square root, it MUST be in positive
for the negative answer will be false
so for the rest of the answer you need to try it
3² = 9 < 10 so it's true
4² =16 > 10 so it's false
the only answer is 3
A right triangle table top has legs that
measure 3.5 feet. What is the perimeter
of the table top?
Answer:
i
Step-by-step explanation:
Answer:
12 feet
Step-by-step explanation:
use the pythagorean theorem to figure out what the hypotenuse is
3.5^2+3.5^2=x^2
12.25+12.25=x^2
25=x^2
x=5
now that you know the hypotenuse, you can find the perimeter by adding up all the sides
3.5+3.5+5=12
Find the x- and y-intercepts of the graph of the linear equation 2x − 3y = −10
Answer:
-5 is the x and 10/3 is the y i think
Step-by-step explanation:
Everyone in sandys class has to da a science project . Out of 25 students ,76% have completed their projects .How many students still need to do their projects?
Answer:
The stem-and-leaf plot shows the test scores of a science class. Use the plot to answer the question. 1.how many students scored 78? (1 point) 1 student 2 students 3 students 4 students
the table shows the results of a survey of college students. find the probability that a student's first class of the day is a humanities class, given the student is female. First class of the day for college students male female humanities 70 80 science
Everyone in Andy’s class has to do a science project. Out of the 20 students, 80% have completed their project. How many students still need to finish their projects (got 4 students)
How many of the 28 students in Andy's class are boys, if 4/7 are girls?
Step-by-step explanation:
A circle has a radius of 12.6 cm. What is the exact length of an arc formed by a central angle measuring 100°?
the answer choices are in the picture please help i’ll give brainliest!!
Answer: Your answer should be 8.5 π
The formula to find the length of an arc is:
m ∘ 360 ∘ 2 π r
120 /360 2 π ( 12.6 )
120 /360 25.2 π
Simplify 120 /360 to 1 /3 and finish the other simplifying:
1 /3 25.2 π
25.2 /3 π
Since they want the answer expressed by π , 8.5π is the answer.
Answer:
I just took the test and got it wrong the first time. The correct answer is: 7π cm.
Step-by-step explanation:
There are 1420 students enrolled at Senn. If 60% of these students walk to school, how many students are walking to school?
I need an explanation also :)
Answer:
852 students walking to school
Step-by-step explanation:
Lets start with a simple example so you can get it
if 60% of 100 students walk to school that means
60 students walk to school... right??
so lets simplify it more that means you have multiplied 100 (students) by 60%
or [tex]\frac{60}{100}[/tex] (note: you can say that 60% is equal to [tex]\frac{60}{100}[/tex] )
so the problem told 60% of 1420 students walk to school that means we should
do this: [tex]1420*\frac{60}{100} = 852[/tex]
Answer:
852 walk to school
Step-by-step explanation:
i got this because i divided the 1420 into 10 which became a 142, multiply by 6 and you get 852
also you could
it is really simple also, all you have to do is multiply the number of student, S times the precent of students who walk, so s times w, which is 60 precent turend into .6 precent so 1420 x .6