Answer:
x<3 and x<5
Step-by-step explanation:
Given the quadratic inequality x² - 8x + 15 <0, to get the solution set for the inequality, the following steps must be followedStep 1: Factorize the quadratic expression
x² - 8x + 15 <0
x² - 3x - 5x + 15 <0
x(x - 3) - 5(x - 3) <0
(x -3)(x -5)< 0
x -3<0 and x -5<0
x< 3 and x< 5
Can Someone Plz Help me???!!!
The Answers are
A 480
B 360- IT’S NOT B!
C 272
D 368
Plz Help Me!!
Answer:
D) 368
Step-by-step explanation:
you already have 2 of the sides of WXYZ (120 is the length of both long sides). to get the length of the shorter side (YZ), you can solve for the 3rd side of the triangle WYZ using the pythagorean theorem, which states that the square root of the different between the square of the hypotenus (the line YW, which is 2 * 68 for WYZ) and the square of the known side (WZ, which is 120 here) is equivalent to the unknown side (YZ). using that info,[tex]\sqrt\\(2 *68)^{2} - 120^{2}[/tex] = 64, so 64 is the length of YZ. the perimeter of WXYZ is (2 * WZ) + (2 * YZ) = (2 * 120) + (2 * 64) = 368. therefore, the perimeter of WXYZ is 368!
Help pls ............
What value of s in the equation S/6=18?
A.108
B.24
C.12
D.3
Answer:
108
Step-by-step explanation:
s=18x6
s=108
How many solutions does the system have?Explain
Y=2x+3
-4x+2y=8
Please anyone help !?
Answer:
0
Step-by-step explanation:
-4x+2(2x+3)=8
-4x+4x+3=8
6=8
0=2
no solution
PLS HELP ME PLZZ!!!!!!!!!!!! =)
please help this is due in 5 minutes
Answer:
23 inches
Step-by-step explanation:
You are taking a survey to determine the most popular pizza ordered at the local pizza shop. Which of the examples below will give a random sample of the population? Select all that apply. A) Watching people order pizza one night each week for a month B) Asking your friend what his favorite pizza is C) Having 50 customers rate their favorite pizza as they order D) Asking 5 people at the pizza shop what they ordered
Answer: A
Step-by-step explanation:
The rent for a one-bedroom apartment in Southern California follows the normal distribution with a mean of $2,350 per month and a standard deviation of $260 per month. The distribution of the monthly costs does not follow the normal distribution. In fact, it is positively skewed. What is the probability of selecting a sample of 65 one-bedroom apartments and finding the mean to be at least $2,260 per month
Answer:
0.9974 = 99.74% probability of selecting a sample of 65 one-bedroom apartments and finding the mean to be at least $2,260 per month.
Step-by-step explanation:
To solve this question, we need to understand the normal probability distribution and the central limit theorem.
Normal Probability Distribution:
Problems of normal distributions can be solved using the z-score formula.
In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the zscore 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 pvalue, we get the probability that the value of the measure is greater than X.
Central Limit Theorem
The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean [tex]\mu[/tex] and standard deviation [tex]s = \frac{\sigma}{\sqrt{n}}[/tex].
For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.
The rent for a one-bedroom apartment in Southern California follows the normal distribution with a mean of $2,350 per month and a standard deviation of $260 per month.
This means that [tex]\mu = 2350, \sigma = 260[/tex]
Sample of 65 one-bedroom apartments
65>30, which means that the sampling distribution of the sample means will be approximately normal. Also, [tex]n = 65, s = \frac{260}{\sqrt{65}} = 32.249[/tex]
What is the probability of selecting a sample of 65 one-bedroom apartments and finding the mean to be at least $2,260 per month?
This is 1 subtracted by the pvalue of Z when X = 2260.
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
By the Central Limit Theorem
[tex]Z = \frac{X - \mu}{s}[/tex]
[tex]Z = \frac{2260 - 2350}{32.249}[/tex]
[tex]Z = -2.79[/tex]
[tex]Z = -2.79[/tex] has a pvalue of 0.0026
1 - 0.0026 = 0.9974
0.9974 = 99.74% probability of selecting a sample of 65 one-bedroom apartments and finding the mean to be at least $2,260 per month.
(NOT A MULTIPLE CHOICE)
Suppose a civic engineer wants to conduct a survey to find out if residents of a city would be in favor of widening one of the city's roadways for increased traffic flow
a. Would a sample consisting of residents who utilize that roadway to travel to work each morning be representative? Explain.
b. Would a sample consisting of residents who live along that roadway be representative? Explain.
c. Would a random sample of homeowners in the city be representative? Explain.
9514 1404 393
Answer:
a, b, c --- all not representative
Step-by-step explanation:
The question posed by the engineer is "are residents of the city in favor of ...".
The only representative sample is one from a pool that includes all residents of the city—not just those who (a) use the road, (b) live along the road, or (c) own homes.
__
Additional comment
The engineer may want to refine the question. As posed, it would include children, homeless, and/or institutionalized residents of the city as well as drivers and tax-payers. In inclusive cultural traditions, "residents of the city" may also include animals, plants, water, air, and other holders of spiritual energy.
The National Institute of Mental Health published an article stating that in any one-year period, approximately 9.5 percent of American adults suffer from depression or a depressive illness. Suppose that in a survey of 100 people in a certain town, seven of them suffered from depression or a depressive illness. If you were conducting a hypothesis test to determine if the true proportion of people in that town suffering from depression or a depressive illness is lower than the percent in the general adult American population, what would the null and alternative hypotheses be? (Note = refer to top of page 508 for format and appropriate equality and non-equality symbols, respectively)a. H0 :______b. Ha :______
Answer:
a) [tex]H_{0} = 9.5[/tex]
b) [tex]H_{a} < 9.5[/tex]
Step-by-step explanation:
The National Institute of Mental Health published an article stating that in any one-year period, approximately 9.5 percent of American adults suffer from depression or a depressive illness.
At the null hypothesis, we test if the value we find is equal to the expected value, that is:
[tex]H_{0} = 9.5[/tex]
Test to determine if the true proportion of people in that town suffering from depression or a depressive illness is lower than the percent in the general adult American population
Lower, which means that the alternate hypothesis, we test if the value we find is lower than the expected value, that is:
[tex]H_{a} < 9.5[/tex]
A pair of designer sunglasses was purchased for $120. Since they
were purchased, their price has increased by 15%. What is the new
price?
Answer:
hello gimme-Dem points.
Step-by-step explanation:
A rectangular region is removed from another rectangular region to create the shaded region shown below. Find the area of the shaded region.
Step-by-step explanation:
8x13 kkkxkgkgxkgxkkkxkkk
can you please show me how you got the answer (50 points)
Answer:
[tex]4x^{6}2y^{-2}[/tex]
Step-by-step explanation:
We can use a property I like to call SEi-F. (Subtract Exponents in a Fraction)
But first, there is an exponent outside of the parentheses in both places. We can use the Power of Parentheses to simplify and then use the SEi-F.
We will start with the x in the numerator.
3*4 = 12
Now for the y in the numerator.
4*4 = 16
Our new numerator is [tex]4(2x^{12}y^{16})[/tex]
We do need to simplify the numerator one more time to get rid of the 4 outside the parentheses.
We will start with x's coefficient.
2*4 = 8
Now for y's coefficient.
1**4 = 4
*y seems to have no coefficient, but if so, it has a coefficient of 1. This applies to other variables.
Our final simplified numerator is [tex]8x^{12}4y^{16}[/tex].
Repeat with the denominator.
Try it yourself!
Make sure that when you finish, you finish the fraction.
After completing the denominator, your completed fraction should be:
[tex]\frac{8x^{12}4y^{16}}{4x^{6}2y^{18}}[/tex]
Now we can use the SEi-F to complete the problem.
Start with x.
8x - 4x = 4x
12 - 6 = 6
The first term is [tex]4x^{6}[/tex].
Now for y.
4y - 2y = 2y
16 - 18 = -2
The second term is [tex]2y^{-2}[/tex]
The complete, simplified equation is [tex]4x^{6}2y^{-2}[/tex].
I could be wrong on the answer, but the work should be correct.
Hope this helps. Have a nice day. Oh, and one more thing. Surprised I'm not stealing points?
If an athlete is tested for a certain type of drug usage, then the test will come out either positive or negative. However, these tests are never perfect. Some athletes who are drug free test positive, and some who are drug users test negative. The former are called false positives; the latter are called false negatives. Assume that 5% of all athletes use drugs, 4% of all tests on drug-free athletes yield false positives, and 10% of all tests on drug users yield false negatives. Define the events as follows: Free: an athlete is drug free. User: an athlete is a drug user. Positive: an athlete is tested positive Negative: an athlete is tested negative. Then, we have P(User) - 0.05, P(Positive Free) = 0.04, and P(Negative User) - 0.10, What is the probability that a randomly selected athlete tests positive, P(Positive)? a. 0.083 b. 0.127 c. 0.308 d. 0.312
Answer:
positive...............
I NEED AN EXPLANATION
=7×9
=36 square feetffgxdx
What's the exact value of tan 15°?
Answer:
D
Step-by-step explanation:
type in my calclater it's
d
Answer:
Option D will be your answer
Step-by-step explanation:
hope it helps you
have a great day
2. A bookshelf costs $300 normally. Today it is on sale for 20% off. Which expression or expressions could you use to find the sale price? Circle all correct answers.
a.300 + 0.2(300)
b.300 - 0.2(300)
c.0.2(300)
d.300(0.8)
Answer/Step-by-step explanation:
$300 is the normal price the sale is 20% off
You would need to multiply them together because it then gives you how much it is off.
Then then you would subtract it.
That takes D and C off.
A , is adding and we arnt adding we are subtracting.
Therefore you answer is: B
Which of the following intervals expresses:
-5
Answer:
please ask question clearly I am not even getting question.
Step-by-step explanation:
you have 6 apples at your house. if you want to pack 3 apple s for a road trip, in how many different combination could you pack the apples?
Answer:
6C3 =20
Step-by-step explanation:
Answer:
You could pack 2 combinations.
Step-by-step explanation:
This is because 6 divided by 3 is 2.
What is the value of x in the following ayatem?
6x + 3y = 15
Answer:
[tex]x=\frac{5-y}{x}[/tex]
Step-by-step explanation:
Part 2: Kristen is paid $8.25 per hour. How much would her paycheck be for 39 hours? Show your work
The Kristen's paycheck for 39 hours is $321.75.
What is the unitary method?The unitary method is a technique for solving a problem by first finding the value of a single unit, and then finding the necessary value by multiplying the single unit value.
Given that, Kristen is paid $8.25 per hour.
Paycheck for 39 hours
= 39×8.25
= $321.75
Therefore, the Kristen's paycheck for 39 hours is $321.75.
To learn more about the unitary method visit:
brainly.com/question/22056199.
#SPJ6
7/15 to the nearest thousandth ?
Answer:
0.47
Step-by-step explanation:
Answer:
47/100
Step-by-step explanation:
0.47 Hope it helps (•‿•)✌️
Solve. Show each step.
5.4 - 6x = -6
Answer:
x = 1.9
Step-by-step explanation:
5.4 - 6x = -6
Gotta isolate the x, so you would minus 5.4 from both sides:
5.4 - 5.4 - 6x = (-6) - 5.4
5.4 - 5.4 cancels out, and (-6) - 5.4 is -11.4 What's left is:
- 6x = -11.4
Gotta isolate the x, so divide -6 to both sides. It negative because the sign in front of it is a subtraction sign, it would be positive if there is a addition sign:
- 6x/(-6) = (-11.4)/(-6)
-6 divide by -6 cancels out, and -11.4 divided by -6 is 1.9. A negative divided by a negative is a positive. Result, x is now isolated:
x = 1.9
x/6 - 10 =2
Show your work.
Answer:
72
Step-by-step explanation:
x/6 - 10 = 2
x/6 = 12 (add 10 to both sides)
x = 72 (multiply 6 to both sides)
I need help please...
Answer:
it's B I think because I worked it out and I got B
11) Find the doubling time for an amount invested at a growth rate 7% per year compounded continuously.
C) 7.4 years
D) 4.9 years
A) 9.9 years
B) 8.6 years
Solve the system
2x+3y=9
-2x - 9y + -15
sorry if this does not make sense pls help me
Answer:
i would probably try looking it up and really srr i can't help much
bajar dos numeros de las que aparecen en la primera seccion, segundo: el resultado irá con el segundo dijito de la ( y) y despues dividirlo entre el numero que dio al multipliar esos dijitos
Find the area of the trapezoid.
12 2 cm
10 2 cm
126 cm
[? ] cm
Enter the exact answer. Do not round.
DISTANCE (METERS) TIME (SECONDS) SPEED (M/S) 30 6.6
Answer:
4.5 meters per second
Step-by-step explanation:
30/6.6 = 4.5
Assuming 30 is the meters and 6.6 is the seconds
Van wants to build a square field with a fence around the outside. If he has 104 feet of
fencing, what should be the length of each side of his field?
Answer:
26
Step-by-step explanation:
104 divided by the 4 sides (for perimeter) equals 26