Sickle-cell disease is a painful disorder of the red blood cells that in the United States affects mostly African Americans. To investigate whether the drug hydroxyurea can reduce the pain associated with sickle-cell disease, a study by the National Institutes of Health gave the drug to 150 sickle-cell sufferers and a placebo to another 150 sufferers. The researchers then counted the number of episodes of pain reported by each subject. What is the response variable in this study

Answer:

i need help too

Step-by-step explanation:

...

9514 1404 393

Answer:

  negative

Step-by-step explanation:

The odd-degree polynomial has end behavior with a negative slope, so its leading coefficient must have a negative sign.

Answer:

The following classification is found:

[tex](0.2, 6)[/tex] - Absolute minimum

[tex](-0.2, 10)[/tex] - Absolute maximum

Step-by-step explanation:

Let be [tex]f(x) = 125\cdot x^{3}-15\cdot x + 8[/tex], we need to find first and second derivatives of this expression at first:

First derivative

[tex]f'(x) = 375\cdot x^{2}-15[/tex] (Eq. 1)

Second derivative

[tex]f''(x) = 750\cdot x[/tex] (Eq. 2)

Critical points are points that equals first derivative to zero and that may be maxima or minima. That is:

[tex]375\cdot x^{2} -15 = 0[/tex]

[tex]x = \pm \sqrt{\frac{15}{375} }[/tex]

Which leads to the following critical points:

[tex]x_{1}\approx 0.2[/tex] and [tex]x_{2} \approx -0.2[/tex]

Now we evaluate each result in second derivative expression:

[tex]f''(x_{1}) = 750\cdot (0.2)[/tex]

[tex]f''(x_{1})=150[/tex] (Absolute minimum)

[tex]f''(x_{2})= 750\cdot (-0.2)[/tex]

[tex]f''(x_{2}) = -150[/tex] (Absolute maximum)

Lastly we evaluate the function at each critical point:

[tex]f(x_{1})= 125\cdot (0.2)^{3}-15\cdot (0.2)+8[/tex]

[tex]f(x_{1})= 6[/tex]

[tex]f(x_{2})= 125\cdot (-0.2)^{3}-15\cdot (-0.2)+8[/tex]

[tex]f(x_{2}) = 10[/tex]

And the following classification is found:

[tex](0.2, 6)[/tex] - Absolute minimum

[tex](-0.2, 10)[/tex] - Absolute maximum

Answer:

7(y+3)=5y+8

y= -3/2  One solution

Step-by-step explanation:

Answer:

It would be a triangular prism.

Step-by-step explanation:

We know this because of the two triangles at the top and bottom of this net and the rectangle connecting them. Then, if you imagine folding the second rectangle up, it would be one of the triangle's sides. Lastly for the third rectangle, it would be folded over the two triangles to finish the shape.

I hope this helps!!

Answer:

It would be a triangular prism

Step-by-step explanation:

If they ask how you got that say since the triangles at the top and bottom are both parell and to be a prim you need to have parell sides

Answer: 31 milligrams

Step-by-step explanation: As you can see on the chart you attached, 48 hrs equals 31 mg. One day is 24 hours, so that would mean two days in 48 hrs.

Answer:

about  22 percent

Step-by-step explanation:

Answer:

12

Step-by-step explanation:

if 4x4 is 16 and we want to know what is 3/4 of that then we can easily just subtract 4 from it

Answer:

The guy above me is right.

Step-by-step explanation:

Answer:

How many apples did the prince pick?

the prince ended up with 2 apples:

the prince picked 30 golden apples

How does the problem change if there happened to be 4 trolls Instead of 3? If the Prince still ends up with two apples, how many did he start with?

you must add one more troll into the sequence:

the prince picked 62 golden apples

Answer:

[tex]\left(x-1+3y\right)\left(x-1-3y\right)[/tex]

Step-by-step explanation:

[tex]x^2-2x+1-9y^2\\\\factor(skip for time)\\\\\left(x-1\right)^2-9y^2\\\\[/tex]

A little algebra process later...

you got the answer

Hoped this helped ya

<3

Answer:

(x-1-3y) x (x-1+3y)

Step-by-step explanation:

x^2-2x+1-9y^2

Using a^2 - 2ab + b^2 = (a-b)^2 (factor the expression) = (x-1)^2 - 9y^2

(x-1)^2 - 9y^2 = (x-1-3y) x (x-1+3y)  should be the answer :)

Answer:

(a) Hypergeometric distribution

(b) 0.785384...

Step-by-step explanation:

(a) looking at the question, we see that [tex]X = \in \{0, ... , 10 \}[/tex], suppose Evans studied s key terms, this implies that he has not studied 100 - s key terms. Suppose [tex]k = \in \{0, ... , 10 \}[/tex] if X = k, then k out of the s key terms he had studied appeared. But 10 - k out of 100 - s key terms he hasn't studied appeared. Thus X is an Hypergeometric distribution, X~HGeom(s, 100 - s, 10) with PMF:

[tex]P_{x}(k) = P(X = k)[/tex]

Answer: -2 and -1

You have the correct answer.

Brad is 3 years older than Francis. The product of their ages is 154. Determine their ages.

Age of Bard× Age of Francis=154

Let's split 3x into +14x and -11x

So we aren't taking ages in negetive

As we know in starting we have take x as Financis age

We know Brad is 3 years older than Francis

With regards!

✧Dull Star✧

Answer:

468 in

Step-by-step explanation:

Step 1: Define conversions

3 feet = 1 yard

1 foot = 12 inches

Step 2: Use dimensional analysis

[tex]13 \hspace{3} yards(\frac{3 \hspace{3} feet}{1 \hspace{3} yard} )(\frac{12 \hspace{3} inches}{1 \hspace{3} feet} )[/tex] = 468 inches

Answer:

Did you know im cracked at fortnite

Step-by-step explanation:

First I do my 90s then double edit simple math pretty ez.

Well l am going to tell you what l think.

Step-by-step explanation:

Nos 1 is an equilateral triangle because it has 3 angles and 3 sides and it's equal to 180°,one angle is 60°.

Nos 2 is an isosceles triangle because it has 2 angles and 2 sides.

Answer:

The magnitude of the velocity will be 60 m/s.

The distance covered is 3,600 m

Step-by-step explanation:

Constant Acceleration Motion

It's known as a type of motion in which the velocity of an object changes by an equal amount in every equal period of time.

If a is the constant acceleration, vo is the initial speed, vf the final speed, and t the time, the following relation applies:

[tex]v_f=v_o+at[/tex]

The distance traveled by the object is calculated as:

[tex]\displaystyle x=v_o.t+\frac{a.t^2}{2}[/tex]

The bus starts from rest, i.e. vo=0, the acceleration is a=0.5 m/s^2. The magnitude of the velocity at t=2 minutes = 120 seconds is:

[tex]v_f=0+0.5\cdot 120=60 \ m/s[/tex]

The magnitude of the velocity will be 60 m/s.

The distance covered during that time is:

[tex]\displaystyle x=0+\frac{0.5\cdot 120^2}{2}[/tex]

[tex]\displaystyle x=\frac{7,200}{2}[/tex]

x = 3,600 m

The distance covered is 3,600 m

Answer:

35 mph

Step-by-step explanation:

210/6=35

Answer:

D.)51.837, B.)51.836, A.)51.835, C.)51.736

Step-by-step explanation:

its decreasing in this order

Answer:

51.837 > 51.836 > 51.835 > 51.736

Answer:

$3

Step-by-step explanation:

Flipping two fair coins :

Sample space :

{TH, HT, TT, HH}

Atleast one head = 12

If not = - 24

Probability of atleast one head = 3/4

If not ; probability of 2 tails = 1/4

Hence,

X ______12 ______ -24

P(x) ___0.75 ______0.25

Expected value for of gamble E(x) :

Σx * p(x) = (12 * 0.75) + (-24 * 0.25)

E(x) = 9 - 6

E(x) = 3

Expected value of gamble = $3

Answer:

Top left

Step-by-step explanation:

If an x value (domain) leads to more than one y-value (range), it is not a function. In other words, if each input value leads to only one output value, it is a function. It's still a function if the y-value leads to multiple x-values.

Answer:

If you are referring to the angle of the polygon, than it is the same, if you are referring to the angle between the initial and final point about the origin, than it's a right angle. If there is a point(x,y) rotated about the origin(0,0), then the new point will be (y,-x).

Answer:

C

Step-by-step explanation:

The slope is 3. A perpendicular line has the complete opposite of the other. So if it is -1/3 slope for one line, the perpendicular line would be 3/1 which simplifies to 3. Hope this helps!

Answer:

[tex]Width: \frac{3in}{8ft} = \frac{5in}{x} (cross multiply)[/tex]

   = [tex]40[/tex] ÷3 ≈ 13.3ft

[tex]Width: \frac {3in}{8ft} = \frac{6.5in}{x}[/tex]

   = 17.3

[tex]A=e[/tex] × [tex]w[/tex]

   [tex]= 13.3[/tex] × [tex]17.3[/tex] ≈ [tex]230.09[/tex] ≈ [tex]230.1[/tex]

Answer: so the answer is A

Step-by-step explanation: -3/2

if you ever have a question like that again go to Math-way it is every helpful and easy.

Answer:

The wood was cut approximately 8679 years ago.

Step-by-step explanation:

At first we assume that examination occured in 2020. The decay of radioactive isotopes are represented by the following ordinary differential equation:

[tex]\frac{dm}{dt} = -\frac{m}{\tau}[/tex] (Eq. 1)

Where:

[tex]\frac{dm}{dt}[/tex] - First derivative of mass in time, measured in miligrams per year.

[tex]\tau[/tex] - Time constant, measured in years.

[tex]m[/tex] - Mass of the radioactive isotope, measured in miligrams.

Now we obtain the solution of this differential equation:

[tex]\int {\frac{dm}{m} } = -\frac{1}{\tau}\int dt[/tex]

[tex]\ln m = -\frac{1}{\tau} + C[/tex]

[tex]m(t) = m_{o}\cdot e^{-\frac{t}{\tau} }[/tex] (Eq. 2)

Where:

[tex]m_{o}[/tex] - Initial mass of isotope, measured in miligrams.

[tex]t[/tex] - Time, measured in years.

And time is cleared within the equation:

[tex]t = -\tau \cdot \ln \left[\frac{m(t)}{m_{o}} \right][/tex]

Then, time constant can be found as a function of half-life:

[tex]\tau = \frac{t_{1/2}}{\ln 2}[/tex] (Eq. 3)

If we know that [tex]t_{1/2} = 5730\,yr[/tex] and [tex]\frac{m(t)}{m_{o}} = 0.35[/tex], then:

[tex]\tau = \frac{5730\,yr}{\ln 2}[/tex]

[tex]\tau \approx 8266.643\,yr[/tex]

[tex]t = -(8266.643\,yr)\cdot \ln 0.35[/tex]

[tex]t \approx 8678.505\,yr[/tex]

The wood was cut approximately 8679 years ago.

Answer:

x = 56 degrees, y = 32 degrees

Step-by-step explanation:

The Isosceles Triangle Theorem (ITT) tells us that if there are two sides of a triangle that are congruent, then the base angles of this triangle are congruent (angles opposite the congruent sides).

Let's focus on Triangle PQS first. We have the acute angle 68° and want to find x. Due to the ITT, we know that the other missing angle must also equal x.

Therefore, we can create an equation where the interior angles of Triangle PQS will add up to 180, because all interior angle measures of a triangle add up to 180 degrees.

Combine like terms.

Subtract 68 from both sides of the equation.

Divide both sides the equation by 2.

We have found that x = 56 degrees, and now we need to find y. We can do so by using the information we have already found. Since we have found the two angles x of Triangle PQS, we can find ∠QSR in Triangle QSR by using the idea that angles that make up a straight line must add up to 180 degrees.

Therefore:

We have found that ∠PSQ = 56, so substitute this value into the equation.

Subtract 56 from both sides of the equation.

Now we can use the fact that all interior angle measurements of a triangle add up to 180 degrees, and since we have 2 angle measures of Triangle QSR, we can create an equation to solve for y.

Combine like terms.

Subtract 148 from both sides of the equation.

We have found x = 56 degrees and y = 32 degrees.

Answer:

Answer:

study writers of pagan Rome

Step-by-step explanation:

Petrarch believed Christian scholars should study writers of pagan Rome. Option (b) is correct.

A writer is someone who writes books, articles, stories, etc., sometimes as a job or a vocation.

Francesco Petrarca, often known as Petrarch, was an Italian philosopher, poet, and one of the first Humanists. He lived from July 20, 1304, to July 19, 1374. The 14th-century Renaissance is frequently regarded with having started as a result of Petrarch's rediscovery of Cicero's letters. Humanism is frequently credited with having its roots in Petrarch. During the Renaissance, Petrarch's sonnets were appreciated, emulated, and used as a template for lyrical poetry all over Europe. Based on Petrarch's writings, Pietro Bembo developed the framework for the modern Italian language in the 16th century.

Therefore, Option (b) is correct. Petrarch believed Christian scholars should study writers of pagan Rome.

Learn more about Writer, here;

https://brainly.com/question/1551277

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Answer:

85

Step-by-step explanation: