Answer:
The required probability is given by, 0.9919.
Step-by-step explanation:
Let, X be the random variable denoting the no. of pages among those 4 pages which Julia writes where she makes no spelling mistake.
clearly,
X [tex]\sim[/tex] Binomial (4, 0.7)
So, P(X = x) = [tex]^4C_{x} \times (0.7)^{x} \times (0.3)^{(4 - x)}[/tex]
[when x = 0, 1, 2, 3, 4]
= 0 otherwise
According to the question, we are to find out P(X ≥ 1) .
Now, P(X ≥ 1)
= 1 - P(X = 0)
= [tex] 1 - (^4C_{0} \times (0.7)^{0} \times (0.3)^{4})[/tex]
= [tex] 1 - 0.0081[/tex]
= 0.9919
So, the required probability is given by, 0.9919
The probability that Julia will have no spelling mistakes on at least one of the pages is approximately 99.19%.
To determine the probability that Julia will have no spelling mistakes on at least one of the four pages she writes, we can first find the probability that she will make at least one spelling mistake on all four pages and then subtract this from 1.
The probability that there will be a spelling mistake on a page:
= 1 - 0.7 = 0.3.
Since the probability of a spelling mistake on each page is independent, we can multiply the probabilities for the four pages together.
The probability of at least one mistake on all four pages:
= 0.3 x 0.3 x 0.3 x 0.3 = 0.3⁴= 0.0081.
The probability that there will be no spelling mistakes on at least one page
= 1 - 0.0081 = 0.9919 or about 99.19%.
So, the probability is 99.19%.
o find the minimum value of the quadratic expression −4x2+8x−25,
−
4
x
2
+
8
x
−
25
,
Marla used the following steps to complete the square:
Step 1: −4(x2+8x)−25
−
4
(
x
2
+
8
x
)
−
25
Step 2: −4(x2+8x+16−16)−25
−
4
(
x
2
+
8
x
+
16
−
16
)
−
25
Step 3: −4(x2+8x+16)+64−25
−
4
(
x
2
+
8
x
+
16
)
+
64
−
25
Step 4: −4(x+4)2+39
−
4
(
x
+
4
)
2
+
39
Did Marla use the correct steps to complete the square?
Answer:
Marla didn't use the right steps to complete the square. Maria made a mistake in step 1, she put 8x instead of -2x
Step-by-step explanation:
we have
[tex]-4x^{2}+8x-25[/tex]
This is a vertical parabola open downward
The vertex is a maximum
Find the vertex
step 1
Factor the leading coefficient -4
[tex]-4(x^{2}-2x)-25[/tex]
step 2
Complete the square
[tex]-4(x^{2}-2x+1-1)-25[/tex]
step 3
[tex]-4(x^{2}-2x+1)-25+4[/tex]
[tex]-4(x^{2}-2x+1)-21[/tex]
step 4
Rewrite as perfect squares
[tex]-4(x-1)^{2}-21[/tex]
the vertex is the point (1,-21)
so
The maximum value of the quadratic equation is (1,-21)
therefore
Marla didn't use the right steps to complete the square. Maria made a mistake in step 1, she put 8x instead of -2x
Marla correctly completed the square for the expression −4x2+8x−25, arriving at the simplified form −4(x+4)2 + 39 to find the minimum value.
Explanation:To find the minimum value of the quadratic expression −4x2+8x−25, Marla completed the square. Her steps are as follows:
Factor out the coefficient of x2: −4(x2+∼2x−∼) -25Add and subtract (b/2a)2 inside the parentheses: −4(x2+8x+16−16) −25Combine the added 16 with the −4 outside and subtract from −25: −4(x2+8x+16) + 64 −25Factor the perfect square trinomial and simplify: −4(x+4)2 + 39
Marla used the correct steps to complete the square, which simplifies to −4(x+4)2 + 39.
A survey of all beings on planet Tott found that 12 beings preferred
hab juice to all other juices. If 40 beings were surveyed altogether,
what percent of them preferred hab juice?
(step by step)
Answer:
30% of them preferred hab juice.
Step-by-step explanation:
Given:
A survey of all beings on planet Tott found that 12 beings preferred hab juice to all other juices.
40 beings were surveyed altogether.
Now, to find percent of them preferred hab juice.
Total beings surveyed = 40.
Number of beings preferred hab juice = 12.
So, to get the percent:
[tex]\frac{Total\ beings\ surveyed}{Number\ of\ beings\ preferred\ hab\ juice} \times 100.[/tex]
[tex]=\frac{12}{40} \times 100[/tex]
[tex]=0.3\times 100[/tex]
[tex]=30\%.[/tex]
Therefore, 30% of them preferred hab juice.
Simplify each expression, and then arrange them in increasing order based on the coefficient of n2. -5(n3 – n2 – 1) + n(n2 – n) (n2 – 1)(n + 2) – n2(n – 3) n2(n – 4) + 5n3 – 6 2n(n2 – 2n – 1) + 3n2
To simplify the expressions and arrange them based on the coefficient of n², combine like terms and perform necessary operations. The expressions, in increasing order, are: 3n + 2, 2n³ - n² + 2n, -5n³ + 6n² - n + 5, and 6n³ - n² + n - 6.
Explanation:To simplify each expression and arrange them in increasing order based on the coefficient of n², we need to combine like terms and perform any necessary operations. Let's go through each expression:
-5(n³ – n² – 1) + n(n² – n) = -5n³ + 6n² - n + 5(n² – 1)(n + 2) – n²(n – 3) = 3n + 2n²(n – 4) + 5n³ – 6 = 6n³ - n² + n - 62n(n² – 2n – 1) + 3n² = 2n³ - 4n² + 2n + 3n² = 2n³ - n² + 2nArranging them in increasing order based on the coefficient of n², we have:
3n + 22n³ - n² + 2n-5n³ + 6n² - n + 56n³ - n² + n - 6Learn more about Simplifying Expressions here:https://brainly.com/question/29003427
#SPJ12
ILL GIVE BRAINLEST AND EXTRA POINTS
Answer:
it's (-3,9 i hope in prey so
Step-by-step explanation:
Answer:
(- 2, - 5 )
Step-by-step explanation:
Note that y = 1 is a horizontal line passing through all points with a y- coordinate of 1
The point (- 2, 7 ) is 6 units above y = 1 (7 - 1 = 6 ), thus
The reflection is 6 units below y = 1, (1 - 6 = - 5 ), hence
P(- 2, 7 ) → P'(- 2, - 5 )
The area of a square is 144 square centimeters. Find the length of the diagonal. Write your answer in simplest radical form.
Answer:
[tex]12\sqrt{2}\ cm[/tex]
Step-by-step explanation:
step 1
Find the length side of the square
we know that
The area of a square is equal to
[tex]A=b^{2}[/tex]
where
b is the length side
we have
[tex]A=144\ cm^2[/tex]
substitute in the formula of area
[tex]144=b^{2}[/tex]
solve for b
square root both sides
[tex]b=12\ cm[/tex]
step 2
Find the length of the diagonal
Applying the Pythagorean Theorem
[tex]d^2=b^2+b^2[/tex]
see the attached figure to better understand the problem
substitute the given values
[tex]d^2=12^2+12^2[/tex]
[tex]d^2=288[/tex]
square root both sides
[tex]d=\sqrt{288}\ cm[/tex]
simplify
[tex]d=12\sqrt{2}\ cm[/tex]
[tex] {x}^{2} - 1 < 18[/tex]
[tex]
x^2-1 < 18 \\
x^2 < 19 \\
x < \sqrt{19}
[/tex]
Hope this helps.
Find the value of X and y?
Answer:
y = 12 ; x = 14
Step-by-step explanation:
2x + 7 =3x - 7 { corresponding angles}
7 + 7 = 3x - 2x
14 = x
x = 14
12y + 1 + 3x - 7 = 180 {co interior angles}
12y + 1 + 3 * 14 - 7 = 180
12y + 1 + 42 - 7 = 180
12y + 36 = 180
12y = 180 - 36
12y = 144
y = 12
The graph of a limacon curve is given. Without using your graphing calculator, determine which equation is correct for the graph. [-5, 5] by [-5, 5]
a. r = 2 - 2 sin θ
b. r = 3 - 2 sin θ
c. r = 2 + 2 sin θ
d. r = 1 - 3 sin θ
Answer:
A
Step-by-step explanation:
A limacon curve passes trough the point [tex]\left(\dfrac{\pi}{2},0\right)[/tex], this means when [tex]\theta =\dfrac{\pi}{2},[/tex] the distance [tex]r=0.[/tex]
Note that
[tex]\sin \dfrac{\pi}{2} =1,[/tex]
so, if [tex]r=a+b\sin \theta,[/tex]
then
[tex]r\left(\dfrac{\pi}{2}\right)=a+b=0\\ \\a=-b[/tex]
The only option which shows a = -b is option A.
Answer:
b
Step-by-step explanation:
Ron and Hermione are lifting feathers into the air with magic. Hermione can lift a feather 3,525
centimeters (cm) into the air. That is 5 times as high as Ron can lift a feather.
How high can Ron lift a feather with his magic?
Answer:705 cm
Step-by-step explanation:
3525 divided by 5
=705
Ron’s feather flew 705 cm
Ron’s feather flew 705 cm with his magic.
What is the unitary method?The unitary method is a method for solving a problem by the first value of a single unit and then finding the value by multiplying the single value.
Hermione can lift a feather 3,525 centimeters (cm) into the air. 5 times as high as Ron can lift a feather.
So
We have to 3525 divided by 5;
3525 / 5
=705
Hence, Ron’s feather flew 705 cm with his magic.
Learn more about the unitary method;
https://brainly.com/question/23423168
#SPJ2
Madison’s monthly salary is $1348. If her budget for rent is 32% of salary, then how much is budgeted for rent?
Answer:
$431.36 is budgeted for rent.
Step-by-step explanation:
Given:
Madison’s monthly salary is $1348.
Her budget for rent is 32% of salary.
Now, to find the amount budgeted for rent.
So, salary = $1348.
And, budget for rent = 32% of $1348.
Thus, the budgeted for rent is:
[tex]32\%\ of\ \$1348.[/tex]
[tex]=\frac{32}{100} \times 1348[/tex]
[tex]=0.32\times 1348[/tex]
[tex]=\$431.36.[/tex]
Therefore, $431.36 is budgeted for rent.
How do you graph x-y-3=0
Answer:
see explanation
Step-by-step explanation:
To graph the line, we require 2 points
Find the intercepts, that is where the graph crosses the x and y axes
To find the x- intercept let y = 0 in the equation and solve for x
x - 3 = 0 ( add 3 to both sides )
x = 3 ⇒ (3, 0 ) ← x- intercept
To find the y- intercept let x = 0 in the equation and solve for y
- y - 3 = 0 ( add 3 to both sides )
- y = 3 ( multiply both sides by - 1 )
y = - 3 ⇒ (0, - 3 ) ← y- intercept
Plot the points (3, 0) and (0, - 3) and draw a straight line through them
Find the number, if d 12/13 of it is 24
Answer:
26 is the number
Step-by-step explanation:
12/13 x = 24
Multiply by 13 on both sides
12x = 24 * 13
12x = 312
Simplify
x = 26
26
Hope this helps :)
Round 0.566 to the nearest tenth
Answer:
0.06
Step-by-step explanation:
If you round 0.566 to the nearest tenth it would be 0.06
pls rate and thank me
Answer:
To round 0.566 to the nearest tenth consider the hundredths' value of 0.566, which is 6 and equal or more than 5. Therefore, the tenths value of 0.566 increases by 1 to 6.
=0.6
Step-by-step explanation:
comment how this helps
Dave's sister baked $3$ dozen pies of which a third contained chocolate, a quarter contained marshmallows, a sixth contained cayenne, and one twelfth contained salted soy nuts. What is the smallest possible number of pies that had none of these ingredients?
Step-by-step explanation:
As Dave's sister baked 3 dozen pies.
So, total number of pies = 3 × 12 = 36
Number of pies = 3×12 = 36
Pies which contained chocolate = 1/3×36 = 12
Pies which contained marshmallows = 1/4×36 = 9
Pies which contained cayenne = 1/6×36 = 6
Pies contained soy nut = 1/12×36 = 3
So,
Pies that had none of these ingredients = 36 - (12+9+6+3)
= 36 - 30
= 6 pies
So, total 6 pieces are left that had none of these ingredients.
i.e. 1, 2, 3, 4, 5, 6
Therefore,
The largest possible number of pies that had none of thees ingredients = 6 piecesThe smallest possible number of pies that had none of thees ingredients = 1 pieceKeywords: smallest possible number
Learn more about word problems regarding numbers from brainly.com/question/1217325
#learnwithBrainly
She baked 36 pies. Of these
1/3*36=12 contained chocolate
1/4*36=9 contained marshmallows
1/636=6 contained cayenne
1/12*36=3 contained salted soy nuts.
In order to make the number of pies with none of these ingredients as small as possible, Dave's sister should put all of these ingredients in different pies so that only one of the ingredients is in any pie. If she does this, then 12+9+6+3=30 of the pies will have one of these ingredients. The other 6 pies will have none of these ingredients. At least 6 pies have none of these ingredients.
-Alcumus AoPS Staff
Brainliest would be great!!!
What is the equation of the line that passes through the point (-1, -3) and has a slope of -5?
answers y = -5x -16
y = -5x -8
y = -5x +8
y = -5x + 16
Answer:
y = -5x -8
Explanation:
Find b in equation y = mx + b
Insert numbers to find b
-3 = -5· -1 + b
Step 1: Simplify both sides of the equation.
−3=(−5)(−1)+b
−3=5+b
−3=b+5
Step 2: Flip the equation.
b+5=−3
Step 3: Subtract 5 from both sides.
b+5−5=−3−5
b=−8
Insert into equation
y = -5x - 8
10 points!
Find the shape resulting from the cross-section of the cylinder.
Answer:
Triangle
Step-by-step explanation:
cross section through the cone perpendicular will be a triangle with the base of the cone's base diameter.
What equation represents the proportional relationship displayed in the table? x=2,4,6,8 y=10,20,30,40 Enter your answer in the box to complete the equation. y = ? x
The answer is y = 5x.
⭐ Please consider brainliest! ⭐
✉️ If any further questions, inbox me! ✉️
Answer:
y=5x
Step-by-step explanation:
I did the test
What is a reasonable distance between two cities? A. 200 km B. 200 m C. 200 cm D. 200 mm
Answer:
A would be best
Step-by-step explanation:
200 km is roughly 124.2 miles
200 m is about 0.12 miles
200 cm and 200 mm is way too small to be distances between cities because 200 cm is like 78.7 inches
200 mm is like 7.8 inches
124.2 miles or 200 km would be a reasonable distances between two cities.
Answer:
A. 200km is your answer
Step-by-step explanation:
Your second mortgage of $31,200 is at a rate of 10.7% compounded quarterly for 8 years. What total will you have paid for your second mortgage after 8 years?
Answer:
The Amount paid after 8 years is $72611.76
Step-by-step explanation:
Given as :
The principal mortgage = p = $31,200
The rate of interest = r = 10.7% compounded quarterly
The time period of mortgage = t = 8 years
Let The Amount paid after 8 years = $A
Now, According to question
From Compounded Interest method
Amount = Principal × [tex](1+\dfrac{\textrm rate}{4\times 100})^{\textrm 4\times time}[/tex]
Or, A = p × [tex](1+\dfrac{\textrm r}{4\times 100})^{\textrm 4\times t}[/tex]
Or, A = $31,200 × [tex](1+\dfrac{\textrm 10.7}{4\times 100})^{\textrm 4\times 8}[/tex]
Or, A = $31,200 × [tex](1.02675)^{32}[/tex]
Or, A = $31,200 × 2.3273
∴ A = $72611.76
So, The Amount paid after 8 years = A = $72611.76
Hence, The Amount paid after 8 years is $72611.76 Answer
The 3rd term of a geometric sequence is -2 and the 7th is -32. Find the common ratio,the first term, the explicit formula, and the 10th term.
Answer:
see explanation
Step-by-step explanation:
The n th term of a geometric sequence is
[tex]a_{n}[/tex] = a[tex](r)^{n-1}[/tex]
where a is the first term and r the common ratio
Both a and r have to be found
Given a₃ = - 2, then
ar² = - 2 → (1)
Given a₇ = - 32, then
a[tex]r^{6}[/tex] = - 32 → (2)
Divide (2) by (1)
[tex]\frac{ar^6}{ar^2}[/tex] = [tex]\frac{-32}{-2}[/tex], that is
[tex]r^{4}[/tex] = 16 ( take the fourth root of both sides )
r = 2 ← common ratio
Substitute r = 2 into (1)
a × 2² = - 2, that is
4a = - 2 ( divide both sides by 4 )
a = - [tex]\frac{1}{2}[/tex] ← first term
Hence
[tex]a_{n}[/tex] = - [tex]\frac{1}{2}[/tex][tex](2)^{n-1}[/tex] ← explicit formula
and
[tex]a_{10}[/tex] = - [tex]\frac{1}{2}[/tex] × [tex]2^{9}[/tex] = - 0.5 × 512 = - 256
How do you graph 4x+2y=10
Step-by-step explanation:
2x+y = 5 (divided by 2)
If x= 0, y=5
If x= 1, y=3
If x=-1, y=7
So, coordinate points are (0,5),(1,3),(1,7) and so on.
Continue above explanation.
After , draw a graph on x,y axis .
Answer: I used a graphing calculator.
Step-by-step explanation:
plz help in the attachment below
Answer:
M(t) = 741·(1/2)^(t/5730)
Step-by-step explanation:
One way to write an exponential function is this:
value at time t = (initial value) · (multiplier over period)^(t/period)
Here, the initial value is given as 741 grams, and the time period is 5730 years. The multiplier over that period is 1/2, since half of the quantity remains after that time. The problem statement tells us that "value at time t" is M(t), so we have ...
M(t) = 741·(1/2)^(t/5730) . . . . . t in years; M(t) in grams
Mickey buys 5 lemons and 3 limes for 3.70.Minnie buys 15 lemons and 4 limes for 7.85. How much does one lime cost?
Answer:
The cost of one lime is $0.65
Step-by-step explanation:
Let
x ---> the cost of one lemon
y ---> the cost of one lime
we know that
Mickey
[tex]5x+3y=3.70[/tex] ----> equation A
Minnie
[tex]15x+4y=7.85[/tex] ---> equation B
Solve the system by elimination
Multiply by -3 both sides equation A
[tex]-3(5x+3y)=-3(3.70)[/tex]
[tex]-15x-9y=-11.10[/tex] ----> equation C
Adds equation C and equation B
[tex]-15x-9y=-11.10\\15x+4y=7.85\\--------\\-9y+4y=-11.10+7.85\\-5y=-3.25\\y=0.65[/tex]
therefore
The cost of one lime is $0.65
[tex](1 \times 10^{5)(6 \times {10}{4} [/tex]
Note that [tex]10^a\cdot10^b=10^{a+b}[/tex] or more general form, [tex]a^b\cdot a^c=a^{b+c}[/tex].
[tex]10^5\cdot6\cdot10^4=\boxed{6\cdot10^9}[/tex]
Hope this helps.
HELP
Find the area of the semicircle.
Either enter an exact answer in terms of
π
πpi or use
3.14
3.143, point, 14 for
π
πpi and enter your answer as a decimal.
The area of the semicircle if the radius is 2 in terms of π is 2π.
What is the area of the semicircle?Area of a circle = πr²
Where,
r = radius
A semicircle is half of a circle.
So,
Area of a semicircle = ½πr²
If r = 2
Area of a semicircle = ½ × π × 2²
= ½ × Π × 4
= 4/2π
= 2π
Hence, the area of the semicircle is 2π.
Read more on area of semicircle:
https://brainly.com/question/15822332
#SPJ2
What is the equation of the line that passes through the point
(
−
6
,
−
6
)
(−6,−6) and has a slope of
2
3
3
2
?
Answer:
y+6=2(x+6)
Step-by-step explanation:
y-y1=m(x-x1)
y-(-6)=2(x-(-6))
y+6=2(x+6)
there are 13 items in a bakers dozen. If Natalie orders 9 bakers dozen of muffins, how many muffins did Matslie order?
Natalie ordered a total of 117 muffins.
Explanation:A bakers dozen is equal to 13 items. If Natalie orders 9 bakers dozen of muffins, we can calculate the total number of muffins by multiplying 13 by 9.
Number of muffins = 13 * 9 = 117
Therefore, Natalie ordered 117 muffins.
Learn more about Calculating number of muffins here:https://brainly.com/question/32842442
#SPJ2
A credit card issuer charges an APR of 19.66%, and its billing cycle is 30 days
long. What is its periodic interest rate?
O
A. 21.72%
OB. 1.62%
O C. 21.53%
O D. 1.22%
SUBMIT
Answer:
The periodic interest rate is 1.62 %
Step-by-step explanation:
Given:
Annual percentage rate = 19.66%
Time period = 30 days
To Find:
Periodic interest rate =?
Solution:
The periodic interest rate r is calculated using the following formula:
r = (1 + \frac{i}{m})^{\frac{m}{n}} - 1
Where,
i = nominal annual rate
n = number of payments per year i.e., 12 for monthly payment, 1 for yearly payment and so on.
m = number of compounding periods per year
The period interest rate per payment is integral to the calculation of annuity instruments including loans and investments.
Now substituting the values we get
[tex]r = (1 + \frac{19.66}{12})^{\frac{12}{12}} - 1[/tex]
[tex]r = (1 + \frac{19.66}{12})^1 - 1[/tex]
r = (1 +1.638 ) - 1
r = (2.638 ) - 1
r = 1.638 %
5% tax on $1.50 What us total cost
Answer:
$1.58
Step-by-step explanation:
1.50 multiplied by 1.05
answer is 1.575
rounded is 1.58
⭐ Please consider brainliest! ⭐
✉️ If any further questions, inbox me! ✉️
Answer:
2.25
Step-by-step explanation:
just multiply .05 by 1.50 so that would be .075, so then add that by original price so 2.25. Don't Quote me on this its been awile.
I need help on this problem
Answer: [tex]QR=4.04[/tex]
Step-by-step explanation:
For this exercise you must use the followinG Trigonometric Identity:
[tex]tan\alpha=\frac{opposite}{adjacent}[/tex]
In this case, given the right triangle PQR, you can identify that:
[tex]\alpha=60\°\\opposite=PR=7.0\\adjacent=QR[/tex]
Then, the next step is to substitute those values into [tex]tan\alpha=\frac{opposite}{adjacent}[/tex]:
[tex]tan(60\°)=\frac{7.0}{QR}[/tex]
And the final step is to solve for "QR" in order to find its value.
So you get that this is:
[tex](QR)(tan(60\°))=7.0\\\\QR=\frac{7.0}{tan(60\°)}\\\\QR=4.04[/tex]