FIRST TO ANSWER GETS MARKED BRAINLEST! please look at picture. The probability that a student guesses the correct answer to a four-choice multiple choice question is P(correct) = 0.25. How many correct answers should a student expect to guess on a test with 56 four-choice multiple choice questions?
A student should expect to guess_______correct answers.
Answer:
14 answers
Step-by-step explanation:
since there is 1/4 of a chance to get a question right by guessing you need to see what 1/4 of 56 is, which is 14
Multiply: -
2/3 x 6/7
Put your answer in lowest terms.
A. 4/7
B. 4/21
C. 12/21
D. 3/7
Answer:
It should be -4/7
Step-by-step explanation:
I hope i helped. And If you can, can you help me by subing to my YT. It’s called Not Claz and it is the same profile pick I have on Brainly.
Rewrite as equivalent rational expressions with denominator (a−7)(a−2)(a+8):
Answer:
[tex] \dfrac{3(a + 8)}{(a - 7)(a - 2)(a + 8)} [/tex]
[tex] \dfrac{8a(a - 2)}{(a - 7)(a - 2)(a + 8)} [/tex]
Step-by-step explanation:
[tex] \dfrac{3}{a^2 - 9a + 14} = [/tex]
[tex] = \dfrac{3}{(a - 7)(a - 2)} [/tex]
[tex] = \dfrac{3(a + 8)}{(a - 7)(a - 2)(a + 8)} [/tex]
[tex] \dfrac{8a}{a^2 + a - 56} = [/tex]
[tex] = \dfrac{8a}{(a + 8)(a - 7)} [/tex]
[tex] = \dfrac{8a(a - 2)}{(a - 7)(a - 2)(a + 8)} [/tex]
A restaurant decides to test their oven's thermostat to see if it is working properly, that is, if the actual temperature inside the oven is the same as the temperature to which the thermostat was set. Twenty times, the oven was set at 350 degrees and then the temperature was measured with a thermometer. The chef wants to know if the average oven temperature is different from 350, when the thermostat is set at 350. What is the correct null and alternative hypothesis for this test
Considering the situation described in the exercise, it is found that the correct null and alternative hypothesis for this test are given by, respectively:
[tex]H_0: \mu = 350[/tex]
[tex]H_1: \mu \neq 350[/tex]
What are the hypothesis tested?At the null hypothesis, it is tested if the mean is of 350 degrees, that is:
[tex]H_0: \mu = 350[/tex]
At the alternative hypothesis, it is tested if the mean is different of 350 degrees, hence:
[tex]H_1: \mu \neq 350[/tex]
More can be learned about the test of an hypothesis at https://brainly.com/question/26454209
Someone good at math pls help me will give brainlist and the most life saver in the world
Answer:
The answer is -46,8
ok so!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! mark me brainliest
i just need someone to tell me i can do it. i know this is wasting someone, somewheres time but i need someone to tell me i can this work done. im so far behind on edgenuity and i feel worthless.
how many different simple random samples of size 5 can be obtained from a population whose size is 45
?
This value is slightly over 1.2 million
========================================================
How I got that answer:
We have 45*44*43*42*41 = 146,611,080 different permutations. I started with 45 and counted down by 1 until I had 5 values multiplied out.
If order mattered, then we would stop here. But order doesn't matter. All that matters is the group overall rather than any particular individual or how they rank in the group.
There are 5! = 5*4*3*2*1 = 120 different ways to arrange a five item set, so the very large result we got earlier is overcounting by a factor of 120.
To fix this, we divide by 120 to get
(146,611,080)/120 = 1,221,759
This represents the number of combinations in which we're selecting 5 members from a pool of 45 total.
You could use the nCr formula
[tex]_nC_r = \frac{n!}{r!*(n-r)!}[/tex]
with n = 45 and r = 5 to get the same answer in bold above.
Using the principle of Combination, the number of different random samples of size five which can be obtained form a population of 45 is 1221759
Using the principle of combination, which is defined as :
nCr = n! ÷ (n-r)!r! n = 45 r = 5Hence,
45C5 = 45! ÷ (45 - 5)!5!
45C5 = 45! ÷ 40!5!
45C5 = (45 × 44 × 43 × 42 × 41) / (5 × 4 × 3 × 2 × 1)
45C5 = 1221759
Therefore, there are 1221759 ways of making a selection of 5 samples from a population of size 45.
Learn more :https://brainly.com/question/10699405?referrer=searchResults
Write 24:18 in a simplest form
Answer:
4:3
Step-by-step explanation:
24:18
Divide each side by 6
24/6 : 18/6
4:3
A skating rink charges $5 per hour plus $3 to rent skates. A second skating rink charges $6 per game plus $2 to rent skates. How many games would person have to play for the two skating rinks to cost the same amount?
Answer:
Each of them would play 2 games to get the same cost amount
Step-by-step explanation:
for example
#1) $5 + $3 = $8 x 2 = $16
#2) $6 + $2 = $8 x 2 = $16
Find the volume of a right rectangular prism if the dimensions of the base are 4 centimeters by 9 centimeters and the height is 11 centimeters.
A 396^3.
B 241^3.
C 144^3.
D 370^3.
396 cm²
Volume of rectangular prism - -
Formula's :
Length * Width * HeightBase area * HeightHere base area:
Length * Width
4 * 9
36 cm²
Volume:
Base area * Height
36 * 11
396 cm²
PLSSSS THIS IS 20 POINTS AND U GET BRAINLIEST!!! Are the lines x = 2 and y = 5 parallel? Are the perpendicular? Explain.
In a recent study on world happiness, participants were asked to evaluate their current lives on a scale from 0 to 10, where 0 represents the worst possible life and 10 represents the best possible life. The mean response was with a standard deviation of . (a) What response represents the percentile? (b) What response represents the percentile? (c) What response represents the quartile? (a) The response that represents the percentile is nothing. (Round to two decimal places as needed.) (b) The response that represents the percentile is nothing. (Round to two decimal places as needed.) (c) The response that represents the quartile is nothing. (Round to two decimal places as needed.)
Answer:
(a) 8.35
(b) 5.98
(c) 3.86
Step-by-step explanation:
The complete question is:
In a recent study on world happiness, participants were asked to evaluate their current lives on a scale from 0 to 10, where 0 represents the worst possible life and 10 represents the best possible life. The mean response was 5.4 with a standard deviation of 2.3. (a) What response represents the 90th percentile? (b) What response represents the 60th percentile? (c) What response represents the first quartile?
Solution:
Assume that the world happiness ratings follows a Normal distribution with parameters μ = 5.4 and σ = 2.3.
(a)
Compute the response representing the 90th percentile as follows:
P (X < x) = 0.90
⇒ P (Z < z) = 0.90
The value of z for the above probability is, z = 1.282.
Compute the value of x as follows:
[tex]x=\mu+z\sigma[/tex]
[tex]=5.4+(1.282\times 2.3)\\\\=5.4+2.9486\\\\=8.3486\\\\\approx 8.35[/tex]
Thus, the response representing the 90th percentile is 8.35.
(b)
Compute the response representing the 60th percentile as follows:
P (X < x) = 0.60
⇒ P (Z < z) = 0.60
The value of z for the above probability is, z = 0.25.
Compute the value of x as follows:
[tex]x=\mu+z\sigma[/tex]
[tex]=5.4+(0.25\times 2.3)\\\\=5.4+0.575\\\\=5.975\\\\\approx 5.98[/tex]
Thus, the response representing the 60th percentile is 5.98.
(c)
Compute the response representing the first quartile of the 25th percentile as follows:
P (X < x) = 0.25
⇒ P (Z < z) = 0.25
The value of z for the above probability is, z = -0.67.
Compute the value of x as follows:
[tex]x=\mu+z\sigma[/tex]
[tex]=5.4+(-0.67\times 2.3)\\\\=5.4-1.541\\\\=3.859\\\\\approx 3.86[/tex]
Thus, the response representing the first quartile is 3.86.
What is -86 + x = - 4x + 29
Answer:
x = 23
Step-by-step explanation:
Add 4x to the left and add 86 to the right.
5x = 115
Now, divide 5 on both sides to get x.
x = 23.
The result is 23.
Answer:
x= – 115/3
Step-by-step explanation:
I don’t know what exact form you want so I’ll give you mixed number form.
Find the the slope of the line that contain 5,3 and -1,4
Answer:
-1/6
Step-by-step explanation:
the equation to do this is y2-y1/x2-x1
therefore you set it up as 4-3/-1-5
then when you simplify it it would be 1/-6
therefore the slope is -1/6
Matthew's family traveled 3/8 of the distance to his grandmother’s house on Saturday. They traveled 3/5 of the remaining distance on Sunday. What fraction of the total distance to his grandmother’s house was traveled on Sunday?
Answer:
3/8 of the total distance.
Step-by-step explanation:
After Saturday = 8/8 - 3/8 = 5/8 of distance left.
Sunday = 5/8 x 3/5 = 3/8 distance.
Hope this helps!
Round 14,465 to the nearest ten thousands place:
Answer:
10,000 is the answer
Step-by-step explanation:
14 465
round up the 4 which is 0 then your answer would be 10000
How much will a person pay for 7 pounds of bananas at a price of $0.49 per pound?
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Answer:
$3.43
Step-by-step explanation:
Multiply 7 by 0.49
Convert 63° to radians.
Answer:
1.1025rad
Step-by-step explanation:
1°=0.0175rad
63°=0.0175rad*63=1.1025rad
(-5xy)(-9xy) (-2xy) =
Simplify
Answer:
-90x^3y^3
Step-by-step explanation:
x + 3y=9
x + y = 21
Solve it algebraically
Answer:
[tex]x=27[/tex]
[tex]y=-6[/tex]
Step-by-step explanation:
substitute in values
[tex]x=21-y[/tex]
[tex](21-y)+3y=9[/tex]
[tex]21+2y=9[/tex]
[tex]2y=-12[/tex]
[tex]y=-6[/tex]
[tex]x+(-6)=21[/tex]
[tex]x=27[/tex]
Solve the equation P=KTV for the letter K.
Answer:
K = [tex]\frac{P}{TV}[/tex]
Step-by-step explanation:
P = KTV
Divide both sides by TV
(P/TV) = K
Which number belongs to solution set of the inequality 11>x
A.11
B.15
C.12
D.4
Find the measure of the angle. (two more and i'm done, sorry)
Answer:
c=102°
b=(360-204)/2 = 78°
Answers:
b = 78
c = 102
=================================
Explanation:
Let's find angle b. This angle adds to the 102 to get 180 since the two angles form a straight angle.
102+b = 180
b = 180-102
b = 78
Then we can apply the same idea to find angle c
b+c = 180
78+c = 180
c = 180-78
c = 102
A shortcut to find angle c is to recall that vertical angles are congruent. The proof of the vertical angle theorem is effectively the steps shown above.
A news article reports that 52% of voters plan to vote for Vicente and 48% of voters plan to vote for Raul.
The margin of error is 3%.
Is there enough statistical evidence to say that Vicente is in the lead?
No, because the confidence interval do not overlap we do not have enough evidence to say that the parameters are different.
Confidence interval of the dataThe confidence interval will help to determine if there is enough evidence in the statistical data draw conclusion that Vicente has the lead.
The confidence interval is 48% - 3% to 48% + 3%, which is equivalent to 45% to 51%.
Since 52% does not lie in the above interval, therefore we can say no, because the confidence interval do not overlap we do not have enough evidence to say that the parameters are different.
Learn more about confidence interval here: https://brainly.com/question/15712887
Answer:
Step-by-step explanation:
NO
3x-8=3(x-3)-2
Is there a answer to this problem? I cant find one
Answer:
The input is a contradiction: it has no solutions
Please help asap! I will gave brainlest!
Answer:
0,180
Step-by-step explanation:
[tex]8 \tan(x) = 0[/tex]
[tex] \tan(x) = 0[/tex]
[tex]x = 0 + 180n[/tex]
This means 0, 180 are the solutions.
7+3 express as a difference
Answer:
7 - (-3)
Step-by-step explanation:
You want the sum 7 + 3 expressed as a difference.
DifferenceThe difference of A and B is written A - B. The subtraction operation is involved.
Subtraction is the same as addition of the opposite. Or, addition is the same as subtracting the opposite:
7 + 3 = 7 - (-3)
__
Additional comment
We can also write the difference as ...
3 - (-7)
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3b. For each differential equation, find the Laplace transform of the solution y:
y'' − y = 5e^−4x + 2x, y(0) = y'(0) = 0.
Answer:
[tex]y(x)=-2x-\frac{11}{6}e^{-x}+\frac{3}{2}e^x+\frac{1}{3}e^{-4x}[/tex]
Step-by-step explanation:
[tex]y''-y=5e^{-4x}+2x,\: y(0)=y'(0)=0\\\\\mathcal{L}\{y''\}-\mathcal{L}\{y\}=\mathcal{L}\{5e^{-4x}\}+\mathcal{L}\{2x\}\\\\s^2Y(s)-sy(0)-y'(0)-Y(s)=\frac{5}{s+4}+\frac{2}{s^2}\\ \\s^2Y(s)-Y(s)=\frac{5}{s+4}+\frac{2}{s^2}\\ \\(s^2-1)Y(s)=\frac{5}{s+4}+\frac{2}{s^2}\\ \\Y(s)=\frac{5}{(s+4)(s^2-1)}+\frac{2}{s^2(s^2-1)}\\ \\Y(s)=\frac{5s^2+2(s+4)}{s^2(s+4)(s^2-1)}\\ \\Y(s)=\frac{5s^2+2s+8}{s^2(s-1)(s+1)(s+4)}[/tex]
Perform the partial fraction decomposition
[tex]\frac{5 s^{2} + 2 s + 8}{s^{2} \left(s - 1\right) \left(s + 1\right) \left(s + 4\right)}=\frac{A}{s}+\frac{B}{s^{2}}+\frac{C}{s + 1}+\frac{D}{s - 1}+\frac{E}{s + 4}\\\\5 s^{2} + 2 s + 8=s^{2} \left(s - 1\right) \left(s + 1\right) E + s^{2} \left(s - 1\right) \left(s + 4\right) C + s^{2} \left(s + 1\right) \left(s + 4\right) D + s \left(s - 1\right) \left(s + 1\right) \left(s + 4\right) A + \left(s - 1\right) \left(s + 1\right) \left(s + 4\right) B[/tex]
[tex]5 s^{2} + 2 s + 8=s^{4} A + s^{4} C + s^{4} D + s^{4} E + 4 s^{3} A + s^{3} B + 3 s^{3} C + 5 s^{3} D - s^{2} A + 4 s^{2} B - 4 s^{2} C + 4 s^{2} D - s^{2} E - 4 s A - s B - 4 B\\\\5 s^{2} + 2 s + 8=s^{4} \left(A + C + D + E\right) + s^{3} \left(4 A + B + 3 C + 5 D\right) + s^{2} \left(- A + 4 B - 4 C + 4 D - E\right) + s \left(- 4 A - B\right) - 4 B[/tex]
Solve for each constant
[tex]\begin{cases} A + C + D + E = 0\\4 A + B + 3 C + 5 D = 0\\- A + 4 B - 4 C + 4 D - E = 5\\- 4 A - B = 2\\- 4 B = 8 \end{cases}[/tex]
[tex]-4B=8\\B=-2[/tex]
[tex]-4A-B=2\\-4A-(-2)=2\\-4A+2=2\\-4A=0\\A=0[/tex]
[tex]A+C+D+E=0\\C+D+E=0\\E=-C-D[/tex]
[tex]-A+4B-4C+4D-E=5\\4(-2)-4C+4D-(-C-D)=5\\-8-4C+4D+C+D=5\\-3C+5D=13\\5D=13+3C[/tex]
[tex]4A+B+3C+5D=0\\4(0)+(-2)+3C+13+3C=0\\-2+6C+13=0\\11+6C=0\\6C=-11\\C=-\frac{11}{6}[/tex]
[tex]5D=13+3C\\5D=13+3(-\frac{11}{6})\\5D=13-\frac{33}{6}\\5D=\frac{15}{2}\\D=\frac{15}{10}\\D=\frac{3}{2}[/tex]
[tex]E=-C-D\\E=-(-\frac{11}{6})-(\frac{3}{2})\\E=\frac{11}{6}-\frac{3}{2}\\E=\frac{2}{6}\\E=\frac{1}{3}[/tex]
Take the inverse transform and solve for the IVP
[tex]Y(s)=\frac{0}{s}+\frac{-2}{s^2}+\frac{-\frac{11}{6}}{s+1}+\frac{\frac{3}{2}}{s-1}+\frac{\frac{1}{3}}{s+4}\\ \\y(x)=-2x-\frac{11}{6}e^{-x}+\frac{3}{2}e^x+\frac{1}{3}e^{-4x}[/tex]
Select the expression that will calculate how many eighths are in 2 bars? Use the model to help you.
a. 2÷ 8
b. 8÷ 2
c. 2÷ 1/8
d. 8 ÷ 1/2
Answer:
4
Step-by-step explanation:
4*2=8
and 4/8 also equals four anyway you simplify the question it will equal 4
Name the relationship between ∠a and ∠b.
Answer:
B. Adjacent
Step-by-step explanation:
Supplementary angles add up to 180 degrees, so cross of A. Vertical angles are directly across from each other, so cross off C. Corresponding angles are related to lines and a transversal which you don't have, so you can cross of D, leaving the answer as B.
Hopefully this helps - let me know if you have any questions!