Answer:
.............gcg................
What’s the correct answer for this?
｡☆✼★ ━━━━━━━━━━━━━━ ☾
The centre coordinates would be the opposite value of what is in the brackets
For example, the x value in the brackets is -3, the centre coordinate x value would be positive 3
The same would apply to the y value
The radius would be the square root of 36
Thus, your answer would be option A
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Stay Brainly! ヅ
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Solve 9x2 + 6 = 12x
Answer:
9x^2 - 12x + 6 =0
work is pictured and shown
An article in the Nov. 11, 2005, issue of the San Luis Obispo Tribune reported that researchers making random purchases at California Wal-Mart stores found scanners coming up with the wrong price 8.3% of the time. Suppose this was based on 200 purchases. The National Institute for Standard and Technology says that in the long run at most two out of every 100 items should have incorrectly scanned prices.
a. Develop a test procedure with a significance level of (approximately) .05, and then carry out the test to decide whether the NIST benchmark is not satisfied.
b. For the test procedure you employed in (a), what is the probability of deciding that the NIST benchmark has been satisfied when in fact the mistake rate is 5%?
Answer:
I don't knoooooooooooooooow
») What kind of triangle is this?
9
17
16
Answer:
scalene
Step-by-step explanation:
We know it isn't a right triangle because it doesn't satisfy the Pythagorean Theorem (9² + 16² ≠ 17²). Because the lengths of the sides are all different, it can't be an equilateral (all equal sides) or an isosceles (2 equal sides) either. Therefore, it is a scalene triangle (all 3 sides different). Hope this helps!
39,918.23 rounded to the nearest thousands is
Answer: 40,000
Step-by-step explanation:
Rounding 39,918.23 to the nearest thousands is 40,000.
The given decimal number is 39,918.23.
We need to round the given decimal to the nearest thousand.
How to round the decimal?We follow the given steps to round numbers to the nearest whole number:
Step 1- We look at the number we want to round.
Step 2- As we are rounding our number to the nearest whole, we mark the digit in the one’s place.
Step 3- Now we look at the ‘tenths’ place (the digit to the right of the decimal point).
Step 4- (i) If the digit in the tenths column is 0, 1, 2, 3 or 4, we will round down the number from one place to the nearest whole number.
(ii) If the digit in the tenths column is 5, 6, 7, 8 or 9, we will round up the number at the one’s place to the nearest whole number.
Step 5- Remove all the digits after the decimal point. The left-out number is the desired answer.
Now, in the given decimal, the number in the thousand places is 9, which is greater than 5, and then the number becomes 40,000.
Therefore, rounding 39,918.23 to the nearest thousands is 40,000.
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What’s the correct answer for this?
Answer:
B
Step-by-step explanation:
(-5,4)
To get from B to A, the x value increases 5 and the y value increases 5, for every one unit increase in x, y also increases by 1. 1/5 of the way is 1/5 times 5 = 1. Just increase both x and y by 1 to get (-5, 4)
-6+1 = -5 = x and 3 + 1 = 4 = y (-5,4) is the point 1/5 of the way from B to A
Which shows one way to determine the factors of x3 + 11x2 – 3x – 33 by grouping?
Step-by-step explanation:
One way
x3 + 11x2 - 3x - 33
x2(x + 11) - 3(x + 11)
(x + 11) (x2 - 3) are the factors
4. The ages of the volunteers at a local food
bank are shown below.
3425, 24, 50, 18. 46. 43, 36.32
What is the median of this set of data?
A 32
0 34
331
(D) 50
Answer:
The median is 43
Step-by-step explanation:
I dont know why your answers dont have any of them,cause with the numbers
3425, 24, 50, 18. 46. 43, 36.32
that makes your median is 43
According to the historical data, the life expectancy in Argentina is equal to the life expectancy in Bolivia. A new study has been made to see whether this has changed. Records of 265 individuals from Argentina who died recently are selected at random. The 265 individuals lived an average of 74.8 years with a standard deviation of 4.1 years. Records of 300 individuals from Bolivia who died recently are selected at random and independently. The 300 individuals lived an average of 75.4 years with a standard deviation of 4.3 years. Assume that the population standard deviation of the life expectancy can be estimated by the sample standard deviations, since the samples that are used to compute them are quite large. At the 0.05 level of significance, is there enough evidence to support the claim that the life expectancy, μ1, in Argentina is not equal to the life expectancy, μ2, in Bolivia anymore? Perform a two-tailed test. Then fill in the table below.
Carry your intermediate computations to at least three decimal places and round your answers as specified in the table. (If necessary, consult a list of formulas.)
The null hypothesis: H sub 0:
The alternative hypothesis: H sub 1:
The type of test statistic:
The value of the test statistic:
The two critical values at the 0.05 level of significance:
Can we support the claim that the life expectancy in Argentina is not equal to the life expectancy in Bolivia? Yes or No
Answer:
Step-by-step explanation:
Hello!
The historical data suggests that the life expectancy in Argentina is equal to the life expectancy in Bolivia.
With the objective of testing if that it hasn't changed, the records of recently deceased people from Argentina and Bolivia were selected at random:
Group 1: Argentina
X₁: Years of life of a recently deceased Argentinian.
n₁= 265
X[bar]₁= 74.8 years
S₁= 4.1 years
Group 2: Bolivia
X₂: Years of life of a recently deceased Bolivian.
n₂= 300
X[bar]₂= 75.4 years
S₂= 4.3 years
The parameters of interest are the population means of the years of life of people in both countries:
H₀: μ₁ = μ₂
H₁: μ₁ ≠ μ₂
α: 0.05
The statistic to use is an approximate standard deviation, and since both samples are quite large, it is valid to use the sample standard deviations in place of the population standard deviations:
[tex]Z= \frac{(X[bar]_1-X[bar]_2)-(Mu_1-Mu_2)}{\sqrt{\frac{S^2_1}{n_1} +\frac{S_2^2}{n_2} } }[/tex]≈N(0;1)
[tex]Z_{H_0}= \frac{(74.8-75.4)-(0)}{\sqrt{\frac{16.81}{265} +\frac{18.49}{300} } }= -2.54[/tex]
The critical values for this test are:
[tex]Z_{\alpha /2}= Z_{0.025}= -1.96[/tex]
[tex]Z_{1-\alpha /2}= Z_{0.0975}= 1.96[/tex]
Using the critical value approach, the decision rule is:
If [tex]Z_{H_0}[/tex] ≤ -1.96 or if [tex]Z_{H_0}[/tex] ≥ 1.96, reject the null hypothesis.
If -1.96 < [tex]Z_{H_0}[/tex] < 1.96, do not reject the null hypothesis.
[tex]Z_{H_0}[/tex] ≤ -1.96 so the decision is to reject the null hypothesis.
So with a 5% significance level, there is enough evidence to reject the null hypothesis, you can conclude that the life expectancy in Argentina is different from the life expectancy in Bolivia.
I hope this helps!
Someone please help me with this! Is this a independent or dependent? Explain why.
Answer:
independent
Step-by-step explanation:
Dependent equations graph as the same line. These lines are not the same, so the equations are independent.
___
However, the lines are parallel, so the equations are also inconsistent. There is no solution to this system of equations.
Is there a positive of negative association between the population of Napa county and the year
Answer:
It's Positive
Step-by-step explanation:
Would a 51-foot ladder be long enough to climb a 50-foot wall? Sketch a graph and find your answer using a trigonometric ratio.
Answer: It is not long enough.
Step-by-step explanation:
Ok, we know that the "rule" for the distance between the base of the ladder and the wall is that, for each 4 ft that the ladder rises, we must have 1 foot between the base of the ladder and the wall.
then, for a 50 feet wall, the ladder must rise 50 ft, this means that the base of the ladder must be:
50ft/4 = 12.5 feet away from the wall.
Now, these two values can be thought as the cathetus of a triangle rectangle, and the ladder will be the hypotenuse, then we have (using Pythagoras theorem)
H = √(12.5ft^2 + 50ft^2) = 51.54 ft
So the theoretical safe value is bigger than the one we have, this means that the 51-foot ladder is not long enough.
What is the meaning of the simile
in the sentence below?
The kids smiled at the
camera like celebrities,
Answer:
smile mean laugh.
thank u
What are the first three terms of the sequence modeled by the recursive function An=1/2a n-1 , when a1=1?
Answer:
A on edge trust
Step-by-step explanation:
The first three term of the sequence are,
⇒ 1/2 , 1/4, 1/8
What is mean by Function?A relation between a set of inputs having one output each is called a function. and an expression, rule, or law that defines a relationship between one variable (the independent variable) and another variable (the dependent variable).
Given that;
The recursive function is,
⇒ [tex]A_{n} = \frac{1}{2} a_{n - 1}[/tex]
And, We have;
⇒ a₁ = 1
Now, The recursive function is,
⇒ [tex]A_{n} = \frac{1}{2} a_{n - 1}[/tex]
Put n = 2;
⇒ [tex]A_{2} = \frac{1}{2} a_{2 - 1}[/tex]
⇒ [tex]A_{2} = \frac{1}{2} a_{1}[/tex]
⇒ [tex]A_{2} = \frac{1}{2}\ * 1[/tex]
⇒ [tex]A_{2} = \frac{1}{2}[/tex]
Put n = 3;
⇒ [tex]A_{3} = \frac{1}{2} a_{3 - 1}[/tex]
⇒ [tex]A_{3} = \frac{1}{2} a_{2}[/tex]
⇒ [tex]A_{3} = \frac{1}{2}\ * \frac{1}{2}[/tex]
⇒ [tex]A_{3} = \frac{1}{4}[/tex]
Put n = 4;
⇒ [tex]A_{4} = \frac{1}{2} a_{4 - 1}\\[/tex]
⇒ [tex]A_{4} = \frac{1}{2} a_{3}[/tex]
⇒ [tex]A_{4} = \frac{1}{2}\ * \frac{1}{4}[/tex]
⇒ [tex]A_{4} = \frac{1}{8}[/tex]
Thus, The first three term of the sequence are,
⇒ 1/2 , 1/4, 1/8
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ther are twi factors of -36 such that one factor is 11 less than half of the other factor.
Answer:
The 2 factors are -2 and 18.
Step-by-step explanation:
xy = -36
Let y = 0.5x - 11 so
x(0.5x - 11) = -36
0.5x^2 - 11x + 36 = 0
0.5(x^2 - 22x + 72) = 0
(x - 4)(x - 18) = 0
x = 4, 18.
Try x = 18:-
The 2 numbers which are factors of -36 must be -2 and 18 because they fit the requirement that 0.5(18) - 11 = 9 - 11 = -2.
30 is 12.5% of what number?
Answer:
The number is 240
Step-by-step explanation:
Is means equals and of means multiply
30 = 12.5% * N
Change to decimal form
30 = .125 N
Divide each side by .125
30/.125 = .125N/.125
240 = N
Answer:
240
Step-by-step explanation:
30=.125x
solve
Three-fourths of the animals at an animal shelter are dogs. One-sixth of the dogs are beagles. What fraction of the animals at the animal shelter are beagles?
Answer:
1/8 I think
Step-by-step explanation:
What’s the correct answer for this?
Answer:
3 option is correct according to me
Answer:
Second option is the correct answer
[tex](x-2)^{2} =79[/tex]
Step-by-step explanation:
[tex]x^{2} -4x -75=0\\(x^{2} -4x+ 4)-4 -75=0\\(x-2)^{2}-79=0\\(x-2)^{2} =79\implies (x-h)^{2} =p[/tex]
Public health officials believe that 91​% of children have been vaccinated against measles. A random survey of medical records at many schools across the country found​ that, among more than​ 13,000 children, only 88.1​% had been vaccinated. A statistician would reject the​ 98% hypothesis with a​ P-value of P= 0.0001.
Required:
a. Explain what the P-value means in this context.
b. The result is statistically significant, but is it important?
Answer:
a) The p value is a probability always between 0 and 1 and represent the evidence in favor of the alternative hypothesis if it's a low value then we have enough evidence to reject the null hypothesis otherwise we FAIl to reject the null hypothesis
b) For this case the result is important because the parameter established by the Public Healt is incorrect ,we obtain a significant result so then there is enough evidence to conclude that the true proportion of children that have been vaccinated against measles is lower than 91%
Step-by-step explanation:
For this case the system of hypothesis are:
Null hypothesis:[tex]p=0.91[/tex]
Alternative hypothesis:[tex]p < 0.91[/tex]
When we conduct a proportion test we need to use the z statisitc, and the is given by:
[tex]z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}}[/tex] (1)
For this case after conduct the hypothesis we have the following p value obtained:
[tex] p_v = 0.0001[/tex]
Part a
The p value is a probability always between 0 and 1 and represent the evidence in favor of the alternative hypothesis if it's a low value then we have enough evidence to reject the null hypothesis otherwise we FAIl to reject the null hypothesis
Part b
For this case the result is important because the parameter established by the Public Healt is incorrect ,we obtain a significant result so then there is enough evidence to conclude that the true proportion of children that have been vaccinated against measles is lower than 91%
A 2-kilogram bag of sugar costs $5.09. What is the unit price, rounded to the nearest cent?
Answer:
$2.55 per kilogram bag of sugar.
Step-by-step explanation:
To calculate the cost of only 1 bag of sugar, you would take what you know - 2 kilograms costs $5.09 - and use that to determine your answer.
Since you know how much 2 bags costs, and you need to know the cost of 1, you would divide the cost of 2 bags of sugar by 2. (5.09 ÷ 2)
That equals 2.545, but since the problem is asking you to round to the nearest cent, you would end up with -------> $2.55
Hope this helps!
stay safe
In 25 years, a bond with a 4.75% annual interest rate earned $2,375 as interest. What was the principal amount of the bond?
Answer:
Denote the principal amount: P
In 25 years, a bond with a 4.75% annual interest rate earned $2,375 as interest.
=> P x (1 + 4.75/100)^25 - P = 2375
=> P x 3.19 - P = 2375
=> P x 2.19 = 2375
=> P = 2375/2.19 = 1084.48$
Hope this helps!
:)
Answer:$2000
Step-by-step explanation:
a cruise ship has a large , circular window. It has a diameter of 6 meters. What is the windows area?
Answer:
28.26
hop thats better the the first anser
which statement describes the congruent triangles
Answer:
2 triangles
Step-by-step explanation:
2 triangles are said to be congruent when all the corresponding sides of the angle and the interior angles are congruent . The two triangle are said to be the mirror image of each other.
One integer is 9 more than another. Their product is 286. Find the integers.
Answer:
138.5 and 147.5
Step-by-step explanation:
Set the two integers as x and x+9
Since the two integers add up to 286, set up the equation:
x+(x+9)=286
2x+9=286
2x=277
x=138.5
x+9=147.5
Which statement best describes the polynomial?
-24x7 – 12x2 - 9x+6
Answer:
a. It is in standard form because the exponents are in order from highest to lowest.
Complete question:
a. It is in standard form because the exponents are in order from highest to lowest.
b. It is in standard form because the coefficients are in order from highest to lowest.
c. It is not in standard form because the constant should be the first term.
d. It is not in standard form because it can be further simplified.
Step-by-step explanation:
-24x^7-12x^2-9x+6
A polynomial is in standard form when the exponents are in order from highest to lowest. In the given expression , the exponent is in order x^7 and then x^2 and then x and constant.
Standard form does not depends on the coefficient of each each.
The given polynomial is in standard form because the exponent are in order from highest to lowest.
Answer:
A
Step-by-step explanation:
help immediately
11.
Some of the steps in Raya's solution to 2.5(6.25 x +0.5) - 11 are shown.
Statement
1. 2.5(6.25x +0.5) - 11
2.
3.
Reason
1. Given
2.
3. Subtraction property of
equality
4. 7
4. x0.624
Select the correct reason for line 4 of Raya's solution.
O Closure property
O Distributive Property
O Addition property of equality
Division property of equality
O Symmetric property of equality
Answer:
The value of x is 0.624.
Property used: Symmetric property of equality
Step-by-step explanation:
The expression to be solved is:
[tex]f (x) = 2.5\cdot (6.25x+0.5)-11[/tex]
Compute the solution as follows:
[tex]f (x) = 2.5\cdot (6.25x+0.5)-11[/tex]
[tex]=(2.5\times 6.25\ x)+(2.5\times 0.5)-11[/tex]
∵ Distributive property (a (b + c) = ab + ac)
[tex]=15.625x+1.25-11\\=15.625x-9.75[/tex]
Substitute equation equal to 0 to compute the value of x as follows:
[tex]0=15.625x-9.75\\\\15.625x=9.75\\\\[/tex]
∵ Symmetric property of equality if a = b then b = a
[tex]x=\frac{9.75}{15.625}\\\\x=0.624[/tex]
Thus, the value of x is 0.624.
Answer:
lol
Step-by-step explanation:
1.) 2.5(6.25x + 0.5) = 11
2.) 15.625x + 1.25 = 11
3.) 15.625x = 9.75
4.) x = 0.624
Reason
1.) Given
2.) Distributive Property
3.) Subtraction Property of Equality
4.) Division Property of Equality
if georgia has 8 watermelons and ate 2, how many does she have now
Step-by-step explanation:
Now she has 6 watermelons.
Answer:
6 watermelons
Step-by-step explanation:
8-2=6 watermelons
What are the solutions of the equation x4 – 9x2 + 8 = 0? Use u substitution to solve. x = 1 and x = 2 StartRoot 2 EndRoot x = ±1 and x = plus-or-minus 2 StartRoot 2 EndRoot x = ±i and x = plus-or-minus 2 i StartRoot 2 EndRoot x = ±i and x = 2 StartRoot 2 EndRoot
Answer:
The solutions are
x = -1, 1, -2√2, and 2√2.
Step-by-step explanation:
Given the equation
x^4 - 9x² + 8 = 0
Let u = x², then the equation becomes
u² - 9u + 8 = 0
u² - u - 8u + 8 = 0
(u² - u) - (8u - 8u) = 0
u(u - 1) - 8(u - 1) = 0
(u - 8)(u - 1) = 0
u - 8 = 0
=> u = 8
Or
u - 1 = 0
=> u = 1
For u = 8
=> x² = 8
=> x = ±√8 = ±2√2
For u = 1
=> x² = 1
=> x = ±√1 = ± 1
Answer:
B
Step-by-step explanation:
if q is inversely proportional to r squared and q=30 when r=3, find r when q=1.2
Answer:
r = 3
Step-by-step explanation:
q = k / [tex]r^{2}[/tex]
k = q[tex]r^{2}[/tex] = 1.2 x 3 x 3 = 10.8
q = 10.8/[tex]r^{2}[/tex]
1.2 = 10.8/[tex]r^{2}[/tex]
r = [tex]\sqrt{10.8 /1.2}[/tex] = 3
As q is inversely proportional to r square the value of r is 1.66 when q is equal to 1.2
What are ratio and proportion?A ratio is a comparison between two similar quantities in simplest form.
Proportions are of two types one is the direct proportion in which if one quantity is increased by a constant k the other quantity will also be increased by the same constant 'k' and vice versa.
In the case of inverse proportion if one quantity is increased by a constant k the quantity will decrease by the same constant k and vice versa.
Given, q is inversely proportional to r square which is,
q ∝ 1/r².
q = k/r².
q = 30 when r = 3, From this we'll have the value of the constant of proportionality(k).
30 = k/9.
k = 30/9.
k = 10/3.
Now, q = 1.2 and k = 10/3.
Therefore,
1.2 = (10/3)/r².
r² = (10/3)×(1/1.2).
r² = 10/3.6.
r² = 2.77.
r = 1.66
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Choose the correct option
1: simplify this expression : 6 ( y + z )
a) 6z + y
b) 6yz
c) 6y + z
d) 6y + 6z
2: which equation shows the commutative property of multiplication ?
a) 9×5 = 5 ×9
b) 4×1 =4
c) 2×3 =2+2+2
d) 6×3 - 8× 3 = ( 6- 8) × 2
3: which property would you use to simplify the following expression
3 ( y + 5 )
a) distributive property
b) multiplication property of zero
c) commutative property
d) associative property
Answer:
1.d because you distribute the 6 to the y and then z so the equation would be 6y+6z
2.a because the commutative property says that no matter the order of the terms you will get the same product so 9x5 would be the same as 5x9
3.a because you distribute the 3 to the y and 5 so the simplifie dversion would be 3y+15
Hope this helps!