Answer:
Where is the question so that I can help you with it
PLEASE HELP SOMEBODY
Answer:
24
Step-by-step explanation:
[tex]79-7=72[/tex]
[tex]\frac{72}{3} =24[/tex]
Consider the discrete probability distribution below. Complete parts and to the right Outcome Probability 0.26 035 2 0.00 0.00 0 1 a. Calcutate the mean of this distibution - Type an integer or a decimal) b. Calculate the standard deviation of this distribution 0.18 3 4 5 6 0.04 0.02 (Round to three decimal places as needed.)
Given data: Outcome 0 1 2 Probability 0.26 0.35 0.39a)
The mean of the distribution is given by: Mean = $\sum x P(x)$The distribution can be represented as follows:
Outcome(x) Probability(P(x)) x P(x) 0 0.26 0 1 0.35 0.35 2 0.39 0.78 $\sum x P(x)=0+0.35+0.78=1.13$
Therefore, Mean = $\frac {\sum xP(x)}{n}=\frac {1.13}{3} =0.3767 ≈ 0.377$ (rounded to three decimal places)
b) The formula for standard deviation is given as: $$\sigma =\sqrt{\sum(x-\mu) ^2P(x)} $$where $\mu$ is the mean of the distribution
Substituting the given values in the above formula, we get:
\begin{align*}\sigma &=\sqrt{\sum(x-\mu) ^2P(x)} \\\sigma &=\sqrt{\sum(x-0.377) ^2P(x)} \end{align*} Outcome(x) Probability(P(x)) $x-μ$ $P(x)(x-μ)^2$ 0 0.26 -0.37746 0.03665 1 0.35 -0.02746 0.00076 2 0.39 1.01254 0.15709 Total 1 0.19450$$\sigma =\sqrt {0.1945}=0.441 ≈ 0.441$$
Therefore, the standard deviation of the distribution is approximately equal to 0.441 (rounded to three decimal places).
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When blood cholesterol levels are tested, sometimes a cardiac risk ratio is calculated.
Cardiac risk ratio=total cholesterol level high-density lipoprotein level HDL
For women, a ratio between 3.0 and 4.5 is desirable.
A woman’s blood test yields an HDL cholesterol level of 60 mg/dL and a total cholesterol level of
225mg/dL. What is her cardiac risk ratio, expressed as a one-place decimal? Yes, Her ratio is in the normal range.
the answer is 3.8, yes.
please show the step of the solution.
The woman's cardiac risk ratio can be calculated by dividing her total cholesterol level by her high-density lipoprotein (HDL) level. With a total cholesterol level of 225 mg/dL and an HDL level of 60 mg/dL, her cardiac risk ratio is 3.8, which falls within the desirable range of 3.0 to 4.5 for women.
To calculate the cardiac risk ratio, we divide the total cholesterol level by the HDL level. In this case, the woman's total cholesterol level is 225 mg/dL, and her HDL level is 60 mg/dL. Thus, her cardiac risk ratio is given by 225 mg/dL / 60 mg/dL = 3.75.
The cardiac risk ratio is typically expressed as a one-place decimal. Rounding the ratio to one decimal place, we get 3.8. Since the desirable range for women's cardiac risk ratio is between 3.0 and 4.5, the woman's ratio of 3.8 falls within this range, indicating a desirable level.
Therefore, the woman's cardiac risk ratio, expressed as a one-place decimal, is 3.8, which indicates a normal and desirable range for her cholesterol levels.
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Mr. Cresta spends $6.00 for every $3.00 he saves. Write a ratio equivalent to Mr. Cresta's spending
Answer:
12:6 or $12 for every $6 he saves
Step-by-step explanation:
If he spends $6.00 for every $3.00, he would save $6 if he spends $12. In this case you could multiple or divide 6 by any number, and do the same to 3 to get an equivalent ratio. Ex. Multiple 6 times 2 to get $12 and 3 times 2 to get $6.
Answer:
300
Step-by-step explanation:
find the number of sides of a regular polygon in which the measure of 1 interior angle is 11 times the measure of the adjacent exterior angle
Let 'n' be the number of sides of a regular polygon, in which the measure of 1 interior angle is 11 times the measure of the adjacent exterior angle.
The formula to find the measure of an interior angle of a polygon is 180°(n - 2) / n. The formula to find the measure of an exterior angle of a polygon is 360° / n. We can use these formulas to form an equation that will help us find 'n'.According to the question, the measure of 1 interior angle is 11 times the measure of the adjacent exterior angle. Mathematically, we can express this as:180°(n - 2) / n = 11(360° / n - 180°(n - 2) / n)Simplifying this equation, we get:180°(n - 2) / n = 11(180° / n)Multiplying both sides by 'n', we get:180°(n - 2) = 11(180°)Simplifying further, we get:n - 2 = 11n = 13Therefore, the number of sides of the regular polygon is 13.Answer: 13
Let's denote the measure of the interior angle as x and the measure of the adjacent exterior angle as y. According to the given information, we have the equation:
x = 11y
In a regular polygon, all interior angles are congruent (have the same measure), and all exterior angles are congruent as well. The sum of the interior and exterior angles adjacent to each other forms a straight line, which measures 180 degrees. Therefore, we can write the equation:
x + y = 180
Substituting x = 11y into the equation, we get:
11y + y = 180
Combining like terms:
12y = 180
Dividing both sides by 12:
y = 15
Now, we can substitute this value back into the equation x = 11y:
x = 11 * 15 = 165
So, the measure of each interior angle is 165 degrees, and the measure of each exterior angle is 15 degrees.
In a regular polygon, the sum of the interior angles can be found using the formula:
Sum of interior angles = (n - 2) * 180
where n is the number of sides of the polygon.
Since each interior angle measures 165 degrees, we can set up the equation:
165n = (n - 2) * 180
Expanding the right side:
165n = 180n - 360
Subtracting 180n from both sides:
-15n = -360
Dividing both sides by -15:
n = 2
Therefore, the regular polygon has 24 sides.
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Let the measure of the adjacent exterior angle be x. Then the measure of the interior angle is 11x.
The number of sides of the regular polygon is given by: [tex]n = 3,960^{\circ} / x[/tex].
Since the polygon is regular, all interior angles and exterior angles have the same measure. Therefore, we can say that the sum of all the exterior angles of a polygon equals 360°.
This gives us an equation:
x + 11x + x + 11x + ...
= 360°,
where there are n terms in the sequence (since there are n sides in the polygon).
Simplifying this equation, we get:
[tex]360^{\circ}= nx[/tex]
Therefore, the number of sides of the polygon is:
[tex]n = 360^{\circ} / x[/tex]
Since the polygon is regular, each exterior angle must be congruent to x. Since the sum of all exterior angles in a polygon equals 360°, we can say that the measure of each exterior angle is:
[tex]x = 360^{\circ} / n[/tex]
Therefore, the measure of each interior angle is:
[tex]11x = 11(360^{\circ} / n)[/tex]
[tex]= 3,960^{\circ} / n[/tex]
Therefore, the number of sides of the regular polygon is given by:
[tex]n = 3,960^{\circ} / x[/tex]
Answer: The number of sides of the regular polygon is given by: [tex]n = 3,960^{\circ} / x[/tex].
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A claim investigating company that investigates illegal claims suspects that the number of claims per major city filed is exceeding the past average of 70 claims, with standard deviation of 8.9. Suppose the company surveys 100 major cities and finds the average number of claims per city to be 71.8. At a significance level of = 0.05, test to determine if this sample data supports the company's suspicion?
The sample data does support the company's suspicion that the number of claims is exceeding the past average.
The company can use a "One-Sample T-Test" to determine if the sample data supports its suspicion. Under the null hypothesis, it is assumed that the mean number of claims per major city is still the previously established population mean of 70.
We can then calculate the test statistic:
T-test statistic = (71.8-70)/(8.9/√100)
= 1.8/0.8931
= 2.02
We can then compare this statistic to the critical value at an alpha level of 0.05. With n=100, and a two-sided test, this value is 1.645.
Because 2.02 > 1.645, we can reject the null hypothesis that the mean number of claims is still 70.
Therefore, the sample data does support the company's suspicion that the number of claims is exceeding the past average.
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Which type of display is for One-Variable data set
Answer:
If you look at the bar graphs, histograms, and circle graphs, they all look at one variable at a time and display the number of times or percentage of times an individual point or interval is counted.
Step-by-step explanation:
Find the radius of the button.
3 and 1/2 in
radius:
Answer:1.75
Step-by-step explanation:
formula= R= D/2
convert 3 1/2 into a decimal
3.5
do 3.5 divided by 2 (R= 3.5/2) = 1.75
so the Radius is 1.75 inches !! hope this helped :)
The radius of the button 3 and 1/2 in would be; 1.75
What is a circle?A circle is a shape consisting of all points in a plane that are given the same distance from a given point called the center.
The formula= Radius= D/2
Now convert 3 and 1/2 into a decimal;
3.5
Now, 3.5 divided by 2 (R= 3.5/2)
= 1.75
Hence, the Radius is 1.75 inches .
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The temperature increases from 18°F to 27° F.
What is the percent increase of the temperature
A) 3%
B) 9%
C) 33%
D) 50%
D) 50%
Explanation: 18 + (18x.50) = 27
Factor the Expression= -3x + 12
Answer:
-3(x-4)
Step-by-step explanation:
to factor, you have to find the gcf of both numbers. the gcf is -3
Answer:
-3 (x-4)
Step-by-step explanation:
Take a negative three out of each part of the problem.
Write the equation in slope intercept form (y=mx+b):
Answer: Y=30x+120
Step-by-step explanation
The x stands for each week, the m stands for the money being added or subtracted. That is why the m and x are being multiplied together in the equation. The b stands for how much the person, Mike, already has. Hope this helps
Assume that the U.S. Mint manufactures dollar coins so that the standard deviation is 0.0390 g. The accompanying list contains weights (grams) of dollar coins manufactured with a new process designed to decrease the standard deviation so that it is less than 0.0390 g. This sample has these summary statistics: n=16, x = 8,068 9. s=0.02 g. A significance level is used to test the claim that the sample is from a population with a standard deviation less than 0.0390 g. 11 we want to use a 0.05 significance level and a parametric method to test the claim that the sample is from a population with a standard deviation less than 0.0390 g, what requirements must be satisfied? How does the normality requirement for a hypothesis test of a claim about a standard deviation differ from the normality requirement for a hypothesis test of a claim about a mean? Click the icon to view the weights of dollar coins manufactured with the new process, What requirements must be satisfied? Select all that apply. A. Either or both of these conditions are satisfied:
A. the population is normally distributed or the sample size is greater than 30. B. The population has a chi-square distribution C. The sample is a simple random sample. D. The sample size is greater than 30. E. The population has a normal distribution F. No requirements must be satisfied.
To test the claim that the sample is from a population with a standard deviation less than 0.0390 g, and using a 0.05 significance level and a parametric method, certain requirements must be satisfied. The requirements include:
A. Either or both of these conditions are satisfied:
A. the population is normally distributed or the sample size is greater than 30.
C. The sample is a simple random sample.
The normality requirement for a hypothesis test of a claim about a standard deviation differs from the normality requirement for a hypothesis test of a claim about a mean. For a hypothesis test of a claim about a standard deviation, it is not necessary for the population to be normally distributed. Instead, either the population should be normally distributed or the sample size should be sufficiently large (typically greater than 30) for the Central Limit Theorem to apply. In this case, the requirement is satisfied if either the population is normally distributed or the sample size is greater than 30. However, the sample should still be a simple random sample, which ensures that the observations are independent and representative of the population.
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Luigi will roll two cubes with faces numbered 1 through 6. Eace face of each cube has one number on it. No number repeats on a cube Luigi records the product of the numbers that land face up. What is the probability that the product of the two numbers will be an odd number less than 20? ОА. ОВ. 8 ΟΟΟ m Ga A-N-ONS
Step-by-step explanation:
There are 36 possible rolls
to be an odd number product.....both dies must be odd numbers
1st 2nd
1 1 3 5
3 1 3 5
5 1 3 that is it for less than 20 product
8 rolls that would be less than 20 product
8 out of 36 probability
Express the following complex numbers in the form atib (i) ei (it) bg (1+²) (iii) Senci) (iv) ezbg(-1)
(i) Express the complex number in the form a+bi:ei (it) bg
The complex number ei(it)bg can be expressed in the form a+bi, where a is the real part and b is the imaginary part of the complex number. In this case, we have:
ei(it)bg = cos(bg) + i sin(bg)
The real part of the complex number is cos(bg) and the imaginary part is sin(bg). Therefore, we can express the complex number as:
ei(it)bg = cos(bg) + i sin(bg)
(ii) Express the complex number in the form a+bi: 1+²
To express the complex number 1+² in the form a+bi, we need to recognize that i² = -1. Therefore, we have:
1+² = 1 - 1 = 0
Since the imaginary part of the complex number is zero, we can express it as:
1+² = 0 + i0
(iii) Express the complex number in the form a+bi: Sen(ci)
To express the complex number Sen(ci) in the form a+bi, we need to use the formula:
Sen(ci) = sin(c) cosh(i) + cos(c) sinh(i)
where sinh(i) = i sin(1) and cosh(i) = cos(1). Therefore, we have:
Sen(ci) = sin(c) cosh(i) + cos(c) sinh(i)
= sin(c) cos(1) + cos(c) i sin(1)
(iv) Express the complex number in the form a+bi: e^zbg(-1)
To express the complex number e^zbg(-1) in the form a+bi, we need to recognize that zbg(-1) is a complex number. Therefore, we have:
e^zbg(-1) = e^(a+bi)
= e^a e^(bi)
= e^a (cos(b) + i sin(b))
where a is the real part of zbg(-1) and b is the imaginary part. Therefore, we can express the complex number as:
e^zbg(-1) = e^a (cos(b) + i sin(b))
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Which expression is equivalent to x+2+[4x-x^2+6x+8 over x+4?
Answer:
-x^3-7x^2-46x-16/x+4
Step-by-step explanation:
The slash is a fraction! Also the fraction is negative :)
Justin lives 5 4/5 miles from his grandfathers house. Write the mixed number as a fraction greater than 1
Answer:
29/5
Step-by-step explanation:
Answer:
29/5
Step-by-step explanation:
As an improper fraction, your answer is 29/5.
I'm not sure what it means by writing it as a fraction "greater than 1".
question a circle has a radius of 21 inches. what is the length of the arc intercepted by a central angle that measures 4π7 radians? express the answer in terms of π . enter your answer in the box.
The length of the arc is given by (4π/7) times the circumference of the circle. Hence, the length of the arc intercepted by a central angle of 4π/7 radians in a circle with a radius of 21 inches is 12π inches.
The circumference of circle is given by the formula C = 2πr, where r is the radius of the circle. In this case, the radius is 21 inches. Therefore, the circumference of the circle is C = 2π(21) = 42π inches.
The central angle of 4π/7 radians is a fraction of the full angle (2π radians). The ratio between the central angle and the full angle is (4π/7)/(2π) = 2/7.
To find the length of the intercepted arc, we multiply the ratio 2/7 by the circumference of the circle:
Length of arc = (2/7) * (42π) = 12π inches.
Hence, the length of the arc intercepted by a central angle of 4π/7 radians in a circle with a radius of 21 inches is 12π inches.
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2) Check to see if x = 2 is the solution to this equation Explain your
reasoning with words and work. Be clear and completel
- 4x - 12 = 2x -8
explain why zero is excluded from the domain and range
Answer:
The range is also all real numbers except zero. You can see that there is some point on the curve for every y -value except y=0 . Domains can also be explicitly specified, if there are values for which the function could be defined, but which we don't want to consider for some reason.
Step-by-step explanation:
hope this helps
PLEASE HELPPPPP
WILL GIVE BRAINLIEST
Answer:
Step-by-step explanation:
From the given table,
A. The unit rate for each car is,
Car A = [tex]\frac{416}{13}[/tex]
= 32 miles per gallon
Car B = [tex]\frac{544}{16}[/tex]
= 34 miles per gallon
Car C = [tex]\frac{665}{19}[/tex]
= 35 miles per gallon
Car D = [tex]\frac{775}{25}[/tex]
= 31 miles per gallon
B. From the derived values in A, the car that uses the least amount of gas is Car C.
C. Total distance covered = 496 miles x 4
= 1984 miles
The gallons of gas the Car A would need for the journey can be determined by;
Car A requires 1 gallon for 32 miles
So that for 1984 miles = [tex]\frac{1984}{32}[/tex]
= 62 gallons
Car A would need 62 gallons of gas to make the trip.
D. Amount spent on gas for Car A = $2.12 x 62
= $131.44
E. speed = [tex]\frac{distance}{time}[/tex]
⇒ time = [tex]\frac{distance}{speed}[/tex]
Given the for Car A, speed = 68 miles per hour.
time = [tex]\frac{1984}{68}[/tex]
= 29.1765
time = 29 hours
It would take approximately 29 hours for Car A to cover the total distance of 1984 miles.
Grayson is deciding between two truck rental companies. Company A charges an initial fee of $40 for the rental plus $2 per mile driven. Company B charges an initial fee of $100 for the rental plus $1 per mile driven. Let A represent the amount
Company A would charge if Grayson drives x miles, and let B represent the amount
Company B would charge if Grayson drives a miles. Write an equation for each situation, in terms of x, and determine which company would be cheaper if Grayson needs to drive 45 miles with the rented truck.
A=
B=
_______ is $_____ cheaper than _____ when driving 45 miles.
Plz before in 10mins.
Answer:
A is 10 dollar cheaper than B
Step-by-step explanation:
A : 40 dollars plus 45*2=90
90+40= 130 dollars
B:100 dollars 45*1=45
100+45= 145 dollars
Answer:
A is 15$ cheaper than b
Step-by-step explanation:
A= 40+(45*2) = 40+90=130$
b= 100+45 =145$
Find the F-test statistic to test the claim that the variances of the two populations are equal. Both distributions are normal. The populations are independent. The standard deviation of the first sample is 4.8329
5.8304 is the standard deviation of the second sample.
The F-test statistic is approximately 1.455.
To find the F-test statistic to test the claim of equal variances for two populations, you need the standard deviations of both samples. Given that the standard deviation of the first sample is 4.8329 and the standard deviation of the second sample is 5.8304, we can proceed with the calculation.
The F-test statistic is calculated as the ratio of the variances of the two samples. In this case, since we only have the standard deviations, we need to square them to obtain the variances.
First, square the standard deviations:
Variance of the first sample (s1^2) = (4.8329)^2 = 23.3747
Variance of the second sample (s2^2) = (5.8304)^2 = 34.0051
Next, calculate the F-test statistic by dividing the larger variance by the smaller variance:
F-test statistic = (larger variance) / (smaller variance)
F-test statistic = s2^2 / s1^2
F-test statistic = 34.0051 / 23.3747
Using the given values, the F-test statistic is approximately 1.455.
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The money spent on gym classes is proportional to the number of gym classes taken. Max spent $45.90 to take 6 gym classes.
What is the amount of money, in dollars, spent per gym class?
Answer:
$7.65
Step-by-step explanation:
its the right answer, TRUST ME!!!!
The vectors a and b represent two forces acting at the same point, and 0 is the smallest positive angle between a and b_ Approximate the magnitude of the resultant force Irll: (Round your answer to one decimal place:) Ila |l 5.3b, Ilb |I 6,9 Ib; 60" Irll'
The magnitude of the resultant force, given two forces represented by vectors a and b with magnitudes 5.3 N and 6.9 N, respectively, and an angle of 60 degrees between them, can be approximated to 8.5 N.
To find the magnitude of the resultant force, we can use the law of cosines. According to the law of cosines, the magnitude of the resultant force (Ir) can be calculated using the formula: [tex](Ir)^2 = |a|^2 + |b|^2[/tex] - [tex]2|a||b|cos(theta)[/tex], where |a| and |b| represent the magnitudes of vectors a and b, and theta is the angle between them.
Given that |a| = 5.3 N, |b| = 6.9 N, and theta = 60 degrees, we can substitute these values into the formula and solve for Ir. Plugging in the values, we have [tex]Ir^2 = (5.3)^2 + (6.9)^2[/tex]- 2(5.3)(6.9)cos(60).
Simplifying the equation, we get [tex]Ir^2[/tex] = 28.09 + 47.61 - 36.66. Combining the terms, we have [tex]Ir^2[/tex] = 39.04.
Taking the square root of both sides, we find Ir ≈ √39.04 ≈ 6.2 N. Rounded to one decimal place, the magnitude of the resultant force is approximately 8.5 N.
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Find the length of the third side. If necessary, round to the nearest tenth.
15
25
Answer:
20.
Step-by-step explanation:
x^2 = 25^2 - 15^2
x^2 = 400
x = 20
PLEASE HELP ME :(
The questions and answer choices are in the picture.
It would also reallyyyyy help me if you explain how you solved it. At least just show the steps.
Thank you!
Hi army! I found the answer!
Answer:
F. An 18-month loan with an annual simple interest rate of 4.75%
Step-by-step explanation:
I just used a credit card payoff calculator to solve this problem. You can use that calculator to solve other problems like this too!
Also, stream BTS Film Out for clear skin and good grades ;)
Have a great day!
A bag contains 8 red pens, 7 blue pens, and 14 black pens. Denato wants to pull a blue pen from the bag.
How many desired outcomes should Denato use in his probability calculation?
Answer: its 22
Step-by-step explanation:
Answer:
7
Step-by-step explanation:
The number of desired outcomes is the total number of blue pens in the bag. There are seven outcomes that can be blue.
PLEASE HELP!!!
I’ll give 40 points!!!
Answer: c is the correct opcion
use cylindrical coordinates. find the volume of the solid that is enclosed by the cone z = x2 y2 and the sphere x2 y2 z2 = 162.
To find the volume of the solid enclosed by the cone and the sphere, we can use cylindrical coordinates. By expressing the equations in cylindrical coordinates and setting up the appropriate limits, we can integrate to calculate the volume of the solid.
In cylindrical coordinates, we have x = r cos θ, y = r sin θ, and z = z.
The equation of the cone, z = x^2y^2, can be expressed in cylindrical coordinates as z = (r^2 cos^2 θ)(r^2 sin^2 θ) = r^4 cos^2 θ sin^2 θ.The equation of the sphere, x^2 + y^2 + z^2 = 162, can be written in cylindrical coordinates as r^2 + z^2 = 162.
To find the limits for integration, we need to determine the intersection points of the cone and the sphere. Setting the equations equal to each other, we have r^4 cos^2 θ sin^2 θ = 162 - r^2.
Simplifying, we get r^4 cos^2 θ sin^2 θ + r^2 - 162 = 0.
We can solve this equation to find the values of r at the intersection points.
Once we have the limits for r, θ, and z, we can set up the triple integral to calculate the volume enclosed by the cone and the sphere.
By evaluating the integral with the appropriate limits, we can find the volume of the solid enclosed by the given cone and sphere equations using cylindrical coordinates.
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A sequence can be generated by using an=an−1+4, where a1=5 and n is a whole number greater than 1.
What are the first 5 terms in the sequence?
5, 20, 80, 320, 1280
4, 9, 14, 19, 24
4, 20, 100, 500, 2500
5, 9, 13, 17, 21
The first 5 terms of the arithmetic sequence are: 5, 9, 13, 17, 21.
How to find the first 5 terms?Here we have an arithmetic sequence, such that the recursive formula is:
[tex]a_n = a_{n- 1} + 4[/tex]
Such that:
a₁ = 5.
Using that formula we can get the next 4 terms. For the second term we use n = 2, so we get:
[tex]a_2 = a_1 + 4 = 5 + 4 = 9[/tex]
For the third term we have:
[tex]a_3 = a_2 + 4 = 9 + 4 = 13[/tex]
For the fourth term we have:
[tex]a_4 = a_3 + 4 = 13 + 4 = 17[/tex]
For the fifth term we have:
[tex]a_5 = a_4 + 4 = 17 + 4 = 21[/tex]
Then the first 5 terms of the sequence are:
5, 9, 13, 17, 21.
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