Answer"
is it B) 10pi cm
Eliza solved a quadratic equation. Her work is shown below, with Step 2 missing.
What could Eliza have written as the result from Step 2?
(2 + 3)2 – 2 = 18
${z + 3)= 20
Step 1
Step 2
2 + 3 = 10
Step 3
I= -13 or 2 = 7 Step 4
Step 2: [tex]$(x + 3)^2 = 100$[/tex]. Step 3: [tex]$x + 3 = \pm 10$[/tex]. Step 4: [tex]$x = -13$[/tex] or [tex]$x = 7$[/tex]. The final answer is (C).
Given:
[tex]\frac{1}{5}(x+3)^2-2 & =18[/tex]
[tex]\frac{1}{5}(x+3)^2 & =20 \quad \text { Step } 1[/tex]
Step 2: To solve for (x+3), we isolate it by dividing both sides by [tex]$\frac{1}{5}$[/tex]:
[tex]\frac{1}{5}(x+3)^2 &= 20[/tex]
[tex](x+3)^2 &= 20 \times 5[/tex]
[tex](x+3)^2 &= 100[/tex]
Step 3: Take the square root of both sides to solve for x+3:
[tex]\sqrt{(x+3)^2} &= \pm \sqrt{100}[/tex]
[tex]x+3 &= \pm 10[/tex]
Step 4: Solve for x by subtracting 3 from both sides:
[tex]x &= -3 \pm 10[/tex]
[tex]x &= -13 \quad \text{or} \quad x = 7[/tex]
So, the complete step by step solution is:
Step 2:
[tex](x+3)^2 = 100[/tex]
Step 3:
[tex]x+3 = \pm 10[/tex]
Step 4:
[tex]x = -13 \quad \text{or} \quad x = 7[/tex]
Thus, the correct answer is (C).
Complete Question:
A survey was given to a random sample of 1350 residents of a town to determine whether they support a new plan to raise taxes in order to increase education spending. Of those surveyed, 26% of the people said they were in favor of the plan. Determine a 95% confidence interval for the percentage of people who favor the tax plan, rounding values to the nearest tenth.
Answer:
[tex]0.26 - 1.96\sqrt{\frac{0.26(1-0.26)}{1350}}=0.237[/tex]
[tex]0.26 + 1.96\sqrt{\frac{0.26(1-0.26)}{1350}}=0.283[/tex]
Rounded the 95% confidence interval would be given by (0.2;0.3)
Step-by-step explanation:
We know that the estimated proportion of people said they were in favor of the plan is [tex]\hat p=0.26[/tex]
We want to construct a confidence interval with 95% of confidence, our significance level would be given by [tex]\alpha=1-0.95=0.05[/tex] and [tex]\alpha/2 =0.025[/tex]. And the critical value would be given by:
[tex]z_{\alpha/2}=-1.96, z_{1-\alpha/2}=1.96[/tex]
The confidence interval for the true proportion of interest is given by the following formula:
[tex]\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}[/tex]
Replacing the info given we got:
[tex]0.26 - 1.96\sqrt{\frac{0.26(1-0.26)}{1350}}=0.237[/tex]
[tex]0.26 + 1.96\sqrt{\frac{0.26(1-0.26)}{1350}}=0.283[/tex]
Rounded the 95% confidence interval would be given by (0.2;0.3)
HELP FAST PLZ
At what rate did the rain fall?
Answer:
2cm ever hour or 1 every 1/2hour
PLLLZZ HELP!!!!
which of these describes a unique polygon?
1.A triangle with angles 30 degrees, 60 degrees, and 90 degrees
2. A triangle with side lengths 5 cm, 4 cm, and 3 cm
3. A quadrilateral with each side length 4 cm
4. A triangle with side lengths 7 cm and 8 cm and a 40-degree angle
Answer:
3. A quadrilateral with each side length 4 cm
Step-by-step explanation:
We need to understand what is a unique polygon?
It means all regular polygons with the same number of sides are similar.
1.A triangle with angles 30 degrees, 60 degrees, and 90 degrees
It is an right triangle, so the 3 sides are not simillar, so it is wrong
2. A triangle with side lengths 5 cm, 4 cm, and 3 cm
It is a triangle with the 3 sides are not simillar, so it is wrong
3. A quadrilateral with each side length 4 cm
It is an square with the 4 sides are simillar, so it is true
4. A triangle with side lengths 7 cm and 8 cm and a 40-degree angle
It is a triangle with the 3 sides are not simillar, so it is wrong
Hence, we choose 3.
Which expression is equivalent to 3(1 + x) + 7?
Answer:
3+3x+7 or 3x+10
Step-by-step explanation:
Answer:
3x+10
Step-by-step explanation:
3(1 + x) + 7
Distribute
3+3x+7
Combine like terms
3x+3+7
3x+10
Least common multiples of 3v^7y^2x^5 and 24y^4x^5
Answer:
the answer is B
Step-by-step explanation:
Rewrite the following equation in slope-intercept form
y + 8 = 1/8 (x+8)
Answer:
y=1/8x-7
Step-by-step explanation:
You have to get Y by itself so start out by subtracting 8 from both sides so you have y=1/8(x+8)-8.
Next simplify by distributing 1/8 to (x+8) which is 1/8+1.
Combine like terms and bam.
y=1/8x-7
A rectangular pyramid has a volume of 1512 in ', a height of 12 in, and a base length of 21 in. What is the width of its base?
2 in
6 in.
12 in.
18 in.
The width of the base of the rectangular pyramid is 6 inches, which is found by rearranging and simplifying the formula for the volume of a pyramid using the given values for the pyramid's volume, height, and length.
Explanation:The student has asked about finding the width of the base of a rectangular pyramid with a known volume, height, and base length. To find the width (w), we use the formula for the volume of a pyramid: V = (1/3) × base area × height. The base area is the product of the base length (l) and width (w), so we can rewrite the equation as V = (1/3) × l × w × h, where
V is the volume of the pyramid,l is the length of the base,w is the width of the base,h is the height of the pyramid.Given that V = 1512 in³, h = 12 in, and l = 21 in, the equation becomes 1512 = (1/3) × 21 × w × 12. Simplifying, we find w = 1512 / (1/3 × 21 × 12), which calculates to 6 in. Hence, the width of the base of the pyramid is 6 inches.
so im really confused by this and could use some help.
Gorilla Weight (pounds) Plugged into 2b - 15 = 605 True or False? Sophia 318 George 417 Nancy 310 Hank 136 Paula 62 Gavin 24 2b- 15 =605.
Answer:
Nancy fits the equation.
Step-by-step explanation:
I think they're asking which gorilla fits the equation.
2b - 15 = 605
Add 15 to both sides
2b=620
Divide both sides by 2
b=310
The only gorilla who weighs 310 pounds is Nancy.
Answer:
Nancy
Step-by-step explanation:
The graph of a logarithmic function is shown below.
On a coordinate plane, a curve starts in quadrant 3 and curves up into the first quadrant. The curve starts at (negative 2, negative 2) and approaches y = 2 in quadrant 1.
What is the domain of the function?
x > –2
x > 0
x < 2
all real numbers
Answer:
a
Step-by-step explanation:
x>-2
Two homeroom classes at Eagletown Junior High charted the amount of time each student spent studying for their science final exam.
Answer:
(A)There are twice as many students in Homeroom B that spent 6 hours studying for their final science exam than in Homeroom A
Step-by-step explanation:
From the dot plot presented,
In Homeroom A, number of students who spent 6 hours studying for their science final exam =1
In Homeroom B, number of students who spent 6 hours studying for their science final exam =4
Therefore, the statement that "There are twice as many students in Homeroom B that spent 6 hours studying for their final science exam than in Homeroom A" is not supported from the dot plot.
The correct option is A.
Find the volume of a cone with a diameter of 11.5 inches and a height of 15.2 inches.
Answer:
The volume of a right circular cone is [tex]526\ \text{feet}^3[/tex].
Step-by-step explanation:
We have,
Diameter of a cone is 11.5 inches
Height of a cone is 15.2 inches
It is required to find the volume of a cone. The volume of a cone is given in terms of radius r and height h as :
d = 11.5 inches
Radius, r = 5.75 inches
[tex]V=\dfrac{1}{3}\pi r^2 h\\\\V=\dfrac{1}{3}\times 3.14\times (5.75)^2\times 15.2\\\\V=526\ \text{inches}^3[/tex],
So, the volume of a right circular cone is [tex]526\ \text{feet}^3[/tex].
Final answer:
To find the volume of a cone with a given diameter and height, use the formula V = (1/3)πr²h where r is the radius and h is the height.
Explanation:
Volume of a cone:
Given diameter = 11.5 inches, radius = 11.5 / 2 = 5.75 inches
Using the formula V = (1/3)πr²h, plug in radius = 5.75 inches and height = 15.2 inches
Calculate the volume: V = (1/3) × 3.142 × (5.75)² × 15.2 inches³
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As an estimation we are told 5 miles is 8 km.
Convert 62.5 miles to km.
Answer:
100.584 KILOMETERS
Step-by-step explanation: cause i know it ❤
hope you get it right! love ya stranger
On conversion of 62.5 miles to kilometers we get 100.625 km.
To convert 62.5 miles to kilometers, use the conversion factor of 1 mile being equal to 1.61 kilometers to calculate that it is equivalent to 100.625 km.
To convert 62.5 miles to kilometers, you can use the fact that 1 mile is equal to 1.61 kilometers to set up a conversion ratio.
1 mile = 1.61 km
62.5 miles x 1.61 km/mile = 100.625 km
Use the divisibility rules to determine which of the following numbers 504 is divisible by. (Check all that apply.)
2
3
5
7
11
The number 504 is divisible by 2, 3, and 7 using the divisibility rules. It is not divisible by 5 as it does not end in 0 or 5, and not by 11 as the difference between the sum of alternating digits is not a multiple of 11.
To determine which numbers 504 is divisible by using the divisibility rules, we can examine each option provided:
2: A number is divisible by 2 if it is even, that is, if its last digit is 0, 2, 4, 6, or 8. Since 504 ends with a 4, it is divisible by 2.
3: A number is divisible by 3 if the sum of its digits is a multiple of 3. For 504, the sum of its digits is 5 + 0 + 4 = 9, which is a multiple of 3, so 504 is divisible by 3.
5: A number is divisible by 5 if its last digit is 0 or 5. Since 504 ends with a 4, it is not divisible by 5.
7: To determine divisibility by 7, there isn't a simple rule like there is for 2 or 5. However, through manual calculation or knowledge, we can confirm 504 is 7 times 72, and therefore, it is divisible by 7.
11: A number is divisible by 11 if the difference between the sum of the digits in the odd positions and the sum of the digits in the even positions is a multiple of 11 or 0. For 504, (5 - 0 + 4) = 9 which is not a multiple of 11, so 504 is not divisible by 11.
In conclusion, 504 is divisible by 2, 3, and 7.
Part one: Sequence and Series
1)
Find the 29th term of the arithmetic sequence in which a=13 and d = -2.5
Answer:
- 57
Step-by-step explanation:
The n th term of an arithmetic sequence is
[tex]a_{n}[/tex] = a + (n - 1)d
where a is the first term and d the common difference
Here a = 13 and d = - 2.5, thus
[tex]a_{29}[/tex] = 13 + (28 × - 2.5) = 13 - 70 = - 57
a(n)=-6-4(n-1) find the 4th term in the sequence.
Answer:
i dont know teeheeee
Step-by-step explanation:
The median of this set of numbers is {20, 30, 40, 50, 60, 70, 80}
Help pls
Slope from graph
Answer:
The slope is -1/3
Madison brought $42.50 to the art supply store. She bought a brush, a sketchbook, and a paint set. The brush was 1/4 as much as the sketchbook, and the sketchbook cost 2/3 the cost of the paint set. Madison had $4.00 left over after buying these items.
Answer:
Amount spent on each item is;
brush = $3.50
sketchbook = $14.00
paint set = $21.00
Completed question:
Madison brought $42.50 to the art supply store. She bought a brush, a sketchbook, and a paint set. The brush was 1/4 as much as the sketchbook, and the sketchbook cost 2/3 the cost of the paint set. Madison had $4.00 left over after buying these items. How much is each item.
Step-by-step explanation:
Let x,y and z represent the price of brush, sketchbook and paint set respectively.
The brush was 1/4 as much as the sketchbook,
x = 1/4 × y
y = 4x ....1
the sketchbook cost 2/3 the cost of the paint set
y = 2/3 × z
3y = 2z
z = 3y/2
Substituting equation 1
z = 3(4x)/2 =6x
z = 6x ....2
Total amount spent = amount he brought - amount he left with(remainder)
= $42.50 - $4.00
= $38.50
Total amount spent = x+y+z = $38.50
x+y+z = 38.50
Substituting equation 1 and 2
x + 4x + 6x = 38.50
11x = 38.50
x = 38.50/11
x = 3.5
y = 4x = 4(3.5) = 14
z = 6x = 6(3.5) = 21
Amount spent on each item is;
brush = $3.50
sketchbook = $14.00
paint set = $21.00
you are a waiter at a restaurant, you did a wonderful job and your customers want to leave you a 20% tip. if their bill is $60, how much will your tip be?
Answer:
$12
Step-by-step explanation:
20% of $60 =
= 20% * $60
= 0.20 * $60
= $12
Joaquin and Trisha are playing a game in which the lower median wins the game. Their scores are shown below. Joaquin's scores: 75, 72, 85, 62, 58, 91 Trisha's scores: 92, 90, 55, 76, 91, 74 Which supports the conclusion that Joaquin won the game?
Answer:
Step-by-step explanation:
Given
Joaquin's score is [tex]75,72,85,62,58,91[/tex]
and Trisha's score is [tex]92,90,55,76,91,74[/tex]
Arranging score in order of value we get
Joaquin's : [tex]58,62,72,75,85,91[/tex]
Trisha's : [tex]55,74,76,90,91,92[/tex]
as no of values is even therefore their median is
Joaquin's[tex]=\frac{72+75}{2}=73.5[/tex]
Trisha's [tex]=\frac{76+90}{2}=83[/tex]
Therefore median of Joaquin's is lower
Thus Joaquin wins the game
Answer:
the answer is A)
Step-by-step explanation:
took the test and got a 90
3. Which choice below would ensure that
quadrilateral IJKL is a trapezoid?
A. IJAJK
B. ĪJ | KL
C. IJ KL
D. KL=LI
K
La
Evaluate the expression x3+x2 for x=4
Final answer:
To evaluate the expression x^3 + x^2 for x=4, you substitute 4 into the equation, resulting in 4^3 + 4^2, which is 64 + 16, equalling 80.
Explanation:
The question asks to evaluate the expression x^3 + x^2 for x=4. To do this, we simply substitute 4 into the expression.
First, calculate 4 to the power of 3 (4^3), which is 64. Next, calculate 4 to the power of 2 (4^2), which is 16. Finally, add these two results together: 64 + 16 = 80.
Therefore, x^3 + x^2 evaluated for x=4 is 80.
To evaluate the expression x^3 + x^2 for x=4, substitute the value of x into the expression, resulting in 4^3 + 4^2, which simplifies to 64 + 16, and the final answer is 80.
Explanation:To evaluate the expression x^3 + x^2 for x=4, we need to substitute the value of x into the expression and simplify it. Firstly, we calculate x to the power of 3, which is 4^3, and x to the power of 2, which is 4^2.
4^3 = 4 × 4 × 4 = 64
4^2 = 4 × 4 = 16
Now, we add the results together:
64 (which is 4^3) + 16 (which is 4^2) = 80
Therefore, when we evaluate the expression for x=4, the result is 80.
El ancho de un jardìn de forna rectangular mide 40m y su diagonal 60m ¿Cuàl de las siguientes opciones nos indica la medida del largo del jardìn con dos decimales? A) 44,72 b) 44,55 c) 30,45
Answer:
La longitud del jardín es [tex]l \approx 44.72\,m[/tex]. (Opción A) (The length of the garden is [tex]l \approx 44.72\,m[/tex]) (Option A)
Step-by-step explanation:
El largo del jardín se calcula por el Teorema de Pitágoras (The length of the garden is now calculed by the Pythagorean Theorem):
[tex]l = \sqrt{(60\,m)^{2}-(40\,m)^{2}}[/tex]
[tex]l \approx 44.72\,m[/tex]
Answer:
A) x = 44,72 m
Step-by-step explanation:
A rectangular shape means two dimensions width (w) and length (l) and the internal angles are of 90⁰; therefore if we know one of its side, and a diagonal (d) we can calculate the other side, using Pytagoras Theorem, then:
x² + l² = d²
x² = d² - l² ⇒ x² = (60)² - (40)² ⇒ x² = 3600 - 1600
x² = 2000
x = √2000
x = 44,72 m
What is the solution to the system of equations below y=1/2x-4andy=2x-9 (-2,-5) (-2,-3) (2,-3) (2,-13
The solution to the system of equations y = 1/2x - 4 and y = 2x - 9 is x = -2 and y = -5.
Explanation:To find the solution to the system of equations y = 1/2x - 4 and y = 2x - 9, we need to find the values of x and y that satisfy both equations. We can do this by finding the points of intersection between the two lines graphically or by solving the equations algebraically.
Graphically, we can plot the two lines on a graph and see where they intersect. The points of intersection are (-2, -5) and (2, -3).
Algebraically, we can set the two equations equal to each other and solve for x:
1/2x - 4 = 2x - 9
Now solve for x:
x = -2
Then substitute the value of x back into one of the original equations to find the value of y:
y = 1/2(-2) - 4 = -5
So the solution to the system of equations is x = -2 and y = -5.
What is the radius of a circle whose equation is x2+y2+8x−6y+21=0?
2 units
3 units
4 units
5 units
Answer:
The Answer is 2 Units on edg 2020
Step-by-step explanation:
The radius of a circle whose equation is given is x²+y²+8x−6y+21=0 is; 2.
Radius of a circleThe given equation of the circle is;
x²+y²+8x−6y+21=0.Hence, by collecting like terms and subsequent factorisation by completing the square method, it follows that;
(x+4)² + (y-3)² -16 -9 +21 = 0.(x+4)² + (y-3)² = 4(x+4)² + (y-3)² = 2².By comparison of the equation above with the standard form equation of a circle, it follows that the radius of the circle is; 2
Read more on equation of a circle;
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A container is 24 m long, 9 m wide and 8 m high.
How many books can it hold if each book is 20 cm
long, 16 cm wide and 6 cm thick?
Answer:
900,000 books.
Step-by-step explanation:
The volume of the container = 24 * 9 * 8
= 1728 m^3
The volume of each book = 20*16*6 = 1920 cm^3
There are 100*100*100 = 1,000,000 cm^3 in 1 m^3.
So the number of books the container can hold
= (1728 * 1000000) / 1920
= 900,000.
One side of a rectangle is 2 m shorter than another side. The area is 360 m2. Write a quadratic equation and solve it to find the length of the longer side of the rectangle
Answer:
Step-by-step explanation:
Let one of the side = x
So, other side = x - 2
Area = 360 sq.m
x*(x - 2) = 360
x*x - x * 2 = 360
x² - 2x -360 = 0
x² + 18x - 20x - 18*20 = 0
x(x +18) - 20*(x + 18 ) = 0
(x + 18)(x -20) = 0
{x + 18 is ignored as measurement will not be a negative number}
x - 20 = 0
x = 20
Length of the longer side = 20 m
If a= -3 and b = 4 then the value of 5a^2b is ?
Answer:
-45*4=-180
Step-by-step explanation:
Sarah missed 9 questions on a quiz with 60 questions. What percent of questions did she get wrong?
If Sarah missed 9 questions on a quiz with 60 questions then 15% of questions did she get wrong
What is Percentage?percentage, a relative value indicating hundredth parts of any quantity.
Given that the number of questions in quiz are 60.
In that sarah missed 9 questions.
We need to find what percentage of questions did she get wrong.
x×60 =9
Now divide both sides by 60
x=9/60
x=0.15
Now multiply 0.15 with 100.
0.15×100
15%
Hence, 15% of the questions sarah get wrong.
To learn more on Percentage click:
https://brainly.com/question/28269290
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