Answer:
The initial speed is approximately 104.3 km
Step-by-step explanation:
Let Distance = 240 km
Time = ?
Speed =
Since
Speed = Distance/Time
Distance = Speed × Time
When arrival is late:
240 = S×T
When arrival is on time:
240 = (S+5)×T2
But 40minutes = 2/3 hours
So,
T2 = T - 2/3
240 = (S+5)×(T - 2/3)
240 = ST - 2S/3 + 5T - 10/3
ST - 2S/3 + 5T = 240 + 10/3
S(T - 2/3) + 5T = 730/3
S(T - 2/3) = 730/3 - 5T
S = (730/3 - 5T)/(T - 2/3)
But 240 = ST
S = 240/T
240/T = (730/3 - 5T)/(T - 2/3)
(T - 2/3)/T = (730/3 - 5T)/240
1 - 2/3T = 730/720 - 5T/240
1 + 73/72 = (2/3 + 5/24)T
145/72 = (7/8)T
T = 145/72 × 8/7
= 1160/504
T = 145/63
S = 240/S
= 240×63/145
= 3024/29
≈ 104.3km
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Answer:
Alicia is 18
Step-by-step explanation:
14 + 16 + 18 = 48
Answer: 18
Step-by-step explanation:
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Answer:
1. 40
2. 35.71
Step-by-step explanation:
using
pythagoras theorem
13. The company you work for has downsized and you have lost your job. You receive a severance package of $65 000 and decide to invest it for retirement, earning an average of 7% per year. It has been suggested that you should be able to retire comfortably with $500 000 in savings. If your investment can be modelled with the equation y = 65000(1.07)^x how many years will pass before you reach $500 000?
Answer:
31 years
Step-by-step explanation:
65000*(1.07) ^31 is around $529000
however, 65000*(1.07) ^30 is around $491000
so you would need 31 years to gain more than $500,000.
It will take approximately 30 years to reach $500,000 in savings with an investment that earns an average of 7% per year.
To determine the number of years it will take to reach $500,000 in savings with an investment that earns an average of 7% per year, we can use the given investment model equation: y = 65000(1.07)ˣ.
We need to find the value of x, which represents the number of years.
Setting y = $500,000, we can solve for x:
500,000 = 65,000(1.07)ˣ
500,000/65,000 = (1.07)ˣ
100/13 = (1.07)ˣ
To solve for x, we take the logarithm of both sides:
ln 100/13 = ln (1.07)ˣ
ln 100/13 = x ln (1.07)
x = (ln 100/13)/(ln (1.07))
x = 30
Therefore, it will take approximately 30 years to reach $500,000 in savings with an investment that earns an average of 7% per year.
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Help me pls no links or files if u answer correctly u get brainless hurry
Answer:
171 \(in^2\)
19.5 \(in^2\)
Step-by-step explanation:
To find the area of a parallelogram, one uses the following formula,
\(A=(base)(hieght)\)
Substitute in the given values, and find the area of the parallelogram.
1.
Base = 16
Hieght = 11
\(Area=(base)(height)\\= (11)(16)\\=176\)
2.
Base = 1.5
Hieght = 13
\(Area=(base)(hieght)\\=(1.5)(13)\\=19.5\)
suppose a finite model for an incidence geometry satisfies the additional axiom: every line has exactly three points lying on it. what is the minimum number of points needed for such a geometry? why?
In an incidence geometry with the additional axiom that every line has exactly three points lying on it, the minimum number of points required is 4.
This is because a line must have at least two-points to exist, and if it has only two points, it is not possible to have another point lying on it (since every line must have exactly three points).
Hence, there must be at least 4-points to create two lines such that each line contains exactly three points.
Also, with 4 points, it is possible to create 6 lines such that each line contains exactly 3 points, forming a configuration known as the Fano-plane, which is the smallest example of an incidence geometry that satisfies the given axiom.
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Help me finish my delta maths
Answer:
work on your English first
2. A controller at the factory calls in employees on a flexible work schedule
during increased production cycles according to the sequence below.
10, 14, 18, 22, 26...
Answer:
i dont understand what u want us to do like?
in a circle, a sector with central angle is 225 degrees intercepts an arc of length 30pi in. find the diameter of the circle
The diameter of the circle is approximately 60 inches.
To explain further, we can use the formula relating the central angle of a sector to the length of its intercepted arc. The formula states that the length of the intercepted arc (A) is equal to the radius (r) multiplied by the central angle (θ) in radians.
In this case, we are given the central angle (225 degrees) and the length of the intercepted arc (30π inches).
To find the diameter (d) of the circle, we need to find the radius (r) first. Since the length of the intercepted arc is equal to the radius multiplied by the central angle, we can set up the equation 30π = r * (225π/180). Simplifying this equation gives us r = 20 inches.
The diameter of the circle is twice the radius, so the diameter is equal to 2 * 20 inches, which is 40 inches. Therefore, the diameter of the circle is approximately 60 inches.
In summary, by using the formula for the relationship between central angle and intercepted arc length, we can determine the radius of the circle. Doubling the radius gives us the diameter, which is approximately 60 inches.
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What is the measure of angle COD?
Answer:
45°
Step-by-step explanation:
it is 45 degrees
brainliest plzz
Solve 2
Any links, fake answers for points will be reported.
A certain element x undergoes two successive alpha emission reactions followed by a beta emission reaction. The daughter nuclide formed is ac-230 (z=89). What is the identity of element x?
An element is a pure material made up of atoms with the same amount of protons in their nuclei. The atomic number and the mass number of the element X are 92 and 238 respectively.
What is an element?In chemistry, an element is a pure material made up of atoms with the same amount of protons in their nuclei. Chemical elements, unlike chemical compounds, cannot be broken down into simpler substances by any chemical process.
Let us consider, that z is the atomic no and A is the mass no of the parent element 'X'.
As per the question, X emits two successive alpha particles (²₁He) and one beta, i.e, particle and reached to daughter element (²³⁰₈₉Ac).
Now according to the question, we can write,
\(^A_ZX \overset{-\alpha}{\rightarrow}\ \ ^{A-4}_{Z-2}X\ +\ ^4_2He\ \ \overset{-\alpha}{\rightarrow}\ \ ^{A-8}_{Z-4}X\ +\ ^4_2He\ \ \overset{-\-\beta}{\rightarrow}\ \ ^{A-8}_{Z-3}X\ +\ ^0_{-1}He\)
We see, \(^A_ZX\) that after two α and one β of emission, we get the daughter element \(^{A-8}_{Z-3}X\). Again as given in the problem, the daughter element is \(^{230}_{89}AC\).
∴We can write-
\(^{A-8}_{Z-3}X=^{290}_{89}AC\)
comparing the two, we get,
Z-3=89
Z=92
A-8=230
A=238
Hence, the atomic number and the mass number of the element X is 92 and 238 respectively.
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The equation y = 8.1x models the relationship between the number of hours Alexander works, x, and the dollar amount he earns, y. Which is the graph of the equation y = 8.1x?A coordinate grid with a curved line starting at (1, 8) curving down and to the right passing through (2, 4), (4, 2), and (7, 1)A coordinate grid with a straight line starting at (0, 0) and (1, 8).A coordinate grid with a straight line starting at (0, 2) passing through (2, 4) and (6, 8).
Answer:
Graph B
Step-By-Step Explanation:
Answer:
The correct answer is B
Step-by-step explanation:
how many times do 8 go into 18?
Answer: 2.25
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Answer:
2.5
Step-by-step explanation:
A pyramid is 24 ft tall. A scaled model has a height of 2ft and is 1 foot wide at the base. Identify the scale factor that was used to create the model
Answer:
1/12
Step-by-step explanation:
Given the following :
Actual height of pyramid = 24 ft
Dimension of scaled model :
Height = 2ft ; width = 1ft
The scale factor is a number used to reproduce a reduced dimension of a model by multiplying the actual dimeznsion or size of the model or object.
Since the height is of the scaled model is less than the actual height of the pyramid ; then it could be said that the scale factor is a fraction, because reduction has occurred.
(Height of scaled model / height of actual pyramid)
(2ft / 24ft) = 1/12
The diagonal of a square is 8 cm.
What is the length of the side of this square?
Give your answer as an exact surd in its simplest form
the length of the side of this square is \(4\sqrt{2} \:or \:5.65\)cm
Answer:
Solutions Given:
let diagonal of square be AC: 8 cm
let each side be a.
As diagonal bisect square.
let it forms right angled triangle ABC .
Where diagonal AC is hypotenuse and a is their opposite side and base.
By using Pythagoras law
hypotenuse ²=opposite side²+base side²
8²=a²+a²
64=2a²
a²=\(\frac{64}{2}\)
a²=32
doing square root on both side
\(\sqrt{a²}=\sqrt{32}\)
a=±\(\sqrt{2*2*2*2*2}\)
a=±2*2\(\sqrt{2}\)
Since side of square is always positive so
a=4\(\sqrt{2}\) or 5.65 cm
Answer:
Given :
↠ The diagonal of a square is 8 cm.
To Find :
↠ The length of the side of square.
Using Formula :
Here is the formula to find the side of square if diagonal is given :
\(\implies{\sf{a = \sqrt{2} \dfrac{d}{2}}} \)
Where :
➺ a = side of square ➺ d = diagonal of squareSolution :
Substituting the given value in the required formula :
\({\dashrightarrow{\pmb{\sf{ \: a = \sqrt{2} \dfrac{d}{2}}}}}\)
\({\dashrightarrow{\sf{ \: a = \sqrt{2} \times \dfrac{8}{2}}}}\)
\({\dashrightarrow{\sf{ \: a = \sqrt{2} \times \cancel{\dfrac{8}{2}}}}}\)
\({\dashrightarrow{\sf{ \: a = \sqrt{2} \times 4}}}\)
\({\dashrightarrow{\sf{ \: a = 4\sqrt{2}}}}\)
\({\dashrightarrow{\sf{\underline{\underline{\red{ \: a = 5.65 \: cm}}}}}}\)
Hence, the length of the side of square is 5.6 cm.
\(\underline{\rule{220pt}{3pt}}\)
Several friends (Calvin, Dean, Kelli, and Lee) went to Cal's Late Night Diner for a bite to eat. Match each person to their drink (Iced tea, Lemonade, Root Beer, and Water) and determine how much each paid ($4.99, $5.99, $6.99, and $7.99) for their meal.
Clues:
1. The Diner who paid $4.99 was either Calvin or the one who got the Root Beer.
2. Kelli paid $6.99
3. The one who got the water paid 1 dollar less than Dean.
4. Calvin paid more than Lee.
5. The one who got the Root beer paid 1 dollar less than the one who got the Iced Tea.
Based on the given clues, we can determine the person, drink, and price paid for each individual:
Calvin: Root Beer, $4.99
Dean: Lemonade, $7.99
Kelli: Water, $6.99
Lee: Iced Tea, $5.99
How to determine how much each friends paidFrom clue 1, we know that either Calvin or the person who got the Root Beer paid $4.99. Since Calvin paid more than Lee according to clue 4, Calvin cannot be the one who got the Root Beer. Therefore, Calvin paid $4.99.
From clue 2, Kelli paid $6.99.
From clue 3, the person who got the water paid $1 less than Dean. Since Dean paid the highest price, the person who got the water paid $1 less, which means Lee paid $5.99.
From clue 5, the person who got the Root Beer paid $1 less than the person who got the Iced Tea. Since Calvin got the Root Beer, Lee must have gotten the Iced Tea.
Therefore, the final assignments are:
Calvin: Root Beer, $4.99
Dean: Lemonade, $7.99
Kelli: Water, $6.99
Lee: Iced Tea, $5.99
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A bicycle is on sale for $189.00. The sales tax rate is 5%. How much is the sales tax?
Answer:
The tax rate is 9 dollars and 45 cents.
Step-by-step explanation:
f(x) =x2-17x+60 how to find the zeros of the function
Answer:
x = 1&16
Step-by-step explanation:
f(x) = 0 then
0 =x^2 - 17x + 16
(x-1)(x-16) =0
x -1 =0 or x-16=0
x =1 & x = 16
Answer:
x = 5, x = 12.
Step-by-step explanation:
This is a quadratic function which may factor to the form (x - a)(x - b) whose zeroes are a and b.
To factor this we need two numbers whose product is +60 and whose sum is -17. They are -5 and -12 ( -5*-12 = 60 and -12 + -5 = -17).
So the factors are :
(x - 5)(x - 17)
To find the zeros we equate this to 0:
(x - 5)(x - 17) = 0
x- 5 = 0 gives x = 5
and
x - 12 = 0 gives x = 12.
x²-6x
Whats the answer?
Answer: x(x−6)
Step-by-step explanation:
Answer:
(x+0)(x-6) OR x(x-6)
Step-by-step explanation:
AC 1*0...AC=0
B -6...B=-6
AC 0*-6
B 0-6
(x+0)(x-6) OR x(x-6)
The value of a machine depreciates each year by 5% of its value at the beginning of that year. If its value when new on 1st January 1980 was # 10,250. 00, what was its value in January 1989 when its was 9years old. Give your answer correct to three significant figures.
\(\qquad \textit{Amount for Exponential Decay} \\\\ A=P(1 - r)^t\qquad \begin{cases} A=\textit{current amount}\\ P=\textit{initial amount}\dotfill &10250\\ r=rate\to 5\%\to \frac{5}{100}\dotfill &0.05\\ t=\textit{elapsed time}\dotfill &9\\ \end{cases} \\\\\\ A=10250(1 - 0.05)^{9}\implies A=10250(0.95)^9\implies A\approx 6460\)
In Phoenix, Arizona, the average temperature is 85 degrees Fahrenheit or higher during 25% of the year. During about how many weeks of the year is the average temperature below 85 degrees Fahrenheit?
Answer: 39 weeks
Step-by-step explanation:
Given
The average temperature is \(85^{\circ}F\) or higher
A year has 52 weeks
It is given 25% of the time-temperature is above \(85^{\circ}F\)
So, in the remaining 75% of the weeks, the average temperature is less than \(85^{\circ}F\)
No of weeks can be determined by
\(\Rightarrow 75\%\ \text{of}\ 52\\\\\Rightarrow \dfrac{75}{100}\times 52=39\ \text{weeks}\)
what would be the appropriate diamater,radius, and circumference for 14 ft circle
The apprοpriate diameter when the circumference is 14 ft is apprοximately 4.454 ft, and the apprοpriate radius is apprοximately 2.227 ft.
What is Circle?A circle is a clοsed shape in which every pοint οn the bοundary is equidistant frοm the centre.
Tο find the apprοpriate diameter and radius when the circumference is 14 ft, we can use the fοrmula fοr the circumference οf a circle:
C = 2πr
where C is the circumference and r is the radius.
We can rearrange this fοrmula tο sοlve fοr the radius:
r = C/(2π)
Substituting the given value fοr the circumference, we get:
r = 14/(2π) ≈ 2.227 ft
Tο find the diameter, we can use the fοrmula:
d = 2r
Substituting the calculated value fοr the radius, we get:
d = 2(2.227) ≈ 4.454 ft
Therefοre, the apprοpriate diameter when the circumference is 14 ft is apprοximately 4.454 ft, and the apprοpriate radius is apprοximately 2.227 ft.
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5(-3.4k - 7) + (3k + 21)
\frac{x^2+9x+14}{x^2+10x+16}
x
2
+10x+16
x
2
+9x+14
Answer:
(x+7)(x+2)
(x+2)(x+8)
Step-by-step explanation:
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All of my points to these "simple" questions
Answer:
x = 66°
∠MON = 57°
x = 13°
Step-by-step explanation:
To tired to explain, just take my word for it...
Answer:
1.
X=66
2.
57
3.
13
Step-by-step explanation:
Good luck .
Plz helppp meee wallah I swear to god I will mark you as a brainliest and I will give you 20
Answer:
Step-by-step explanation:
Equation for the linear function has been given as,
y = 26 - 4x
For x = 1,
y = 26 - 4(1)
= 26 - 4
= 22
For x = 2,
y = 26 - 4(2)
= 26 - 8
= 18
For x = 3,
y = 26 - 4(3)
= 26 - 12
= 14
For x = 6,
y = 26 - 4(6)
= 26 - 24
= 2
Therefore, table for the function will be,
x y
1 22
2 18
3 14
6 2
There are 5 questions listed below. Each question includes:
a. 22. 79 - amount
b. 129 - amount
c. 358. 3 - base
d. 40. 65% - percent
e. 2. 58% - percent
How to determine the values
It is important to note that a percentage is the number or ratio expressed as a fraction of 100.
It is denoted using the percent sign, "%"
a. What number is 53% of 43
= 53/ 100 × 43
= 0. 53 × 43
= 22. 79
b. 43% of 300
= 43/ 100 × 300
= 129
c. 12% of what number is 43
12/ 100 × x = 43
x = 43 × 100/ 12
x = 358. 3
d. 43 is what percent of 106
43/106 × 100/ 1
4300×/ 106
40. 5%
e. What percent of 43 is 6
43/ 100 × 6
2.58%
Thus, the percentage of a value is that value divided by 100
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The length of a rectangle is 9 feet longer than five times its width, b. The expression b (9 + 5b) represents the area of the rectangle.
Select all statements about the expression that are true.
O The length of the rectangle is represented by Sb.
The width and length are factors of the area of the rectangle.
The 9 represents an additional 9 square feet being added to the area of the rectangle.
The width of the rectangle is represented by Sb.
The length of the rectangle is represented by 9 + 5b.
Next
The true statement is (E) "The length of the rectangle is represented by 9 + 5b."
What is the area of the rectangle?The area of a rectangle is defined as the product of the length and width.
A. The statement "The length of the rectangle is represented by Sb" is not true. The length of the rectangle is represented by the expression "9 + 5b".
B. The statement "The width and length are factors of the area of the rectangle" is not true. The expression "b(9 + 5b)" represents the area of the rectangle, but it does not mean that the width and length are factors of that expression.
C. The statement "The 9 represents an additional 9 square feet being added to the area of the rectangle" is not true. The expression "9 + 5b" represents the length of the rectangle, not an additional 9 square feet being added to the area.
D. The statement "The width of the rectangle is represented by Sb" is not true. The expression "b" represents the width of the rectangle.
E. The statement "The length of the rectangle is represented by 9 + 5b" is true. The expression "9 + 5b" represents the length of the rectangle.
Therefore, the true statement is (E) "The length of the rectangle is represented by 9 + 5b."
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find the value of k for which the equation 3x square-6x+k=0 has district real root
Hurry please help ASAP I will mark brainliest
Answer:yep
Step-by-step explanation:
Answer:
Well both are answered already and i checked both are right I don't know if that's what you wanted...