Answer:
[tex]F=\frac{K Q1Q2}{d^2} \\[/tex]
Step-by-step explanation:
According to coulombs law "the force of attraction or repulsion between two charges Q1 and Q2 in a given medium is directly proportional to the product of their charges and inversely proportional to the square of the distance separating them"
[tex]F=\frac{K Q1Q2}{d^2} \\[/tex]
where
k = constant of proportionality ([tex]9.05*10^9[/tex])
Answer:
it is c
Step-by-step explanation:
The cost of a diamond varies as the square of its weight. A diamond weighing 20 decigrams costs Rs. 4,800. Find the cost of a diamond of the same kind weighing 8 decigrams.
Answer:
768
Step-by-step explanation:
let C represent cost and w weight, then the equation relating them is
C = kw² ← k is the constant of variation
To find k use the condition w = 20, C = 4800, that is
4800 = k × 20² = 400k ( divide both sides by 400 )
12 = k
C = 12w² ← equation of variation
When w = 8, then
C = 12 × 8² = 12 × 64 = 768
Need help ASAP please
Answer:
-6,6
Step-by-step explanation:
x^2=36
6*6=36
-6*-6=36
A balloon initially has a volume of 45 L at sea level, where temperature is 25∘C and the pressure is 1.0 atm. It rises to an elevation of 2.0 km, where the temperature is 5.0∘C and the pressure is 0.78 atm. What is the balloon's volume at this height?
Answer:
53.8 L
Step-by-step explanation:
We can use the ideal gas formula that relates pressure, volume and temperature:
[tex]\frac{P_1 V_1}{T_1} = \frac{P_2 V_2}{T_2}[/tex]
where P1 = initial pressure = 1.0 atm
V1 = initial volume = 45 L
T1 = initial temperature = 25°C = 25 + 273 = 298 K
P2 = final pressure = 0.78 atm
V2 = final volume
T2 = final temperature = 5.0°C = 5 + 273 = 278 K
Therefore, the final volume will be:
[tex]\frac{1 * 45}{298} = \frac{0.78 * V_2}{278}\\\\0.151 = 0.002806 V_2\\\\=> V_2 = 0.151 / 0.002806\\\\V_2 = 53.8 L[/tex]
Its volume is 53.8 L
Please help me I posted this 10 times and no one helped me they were saying how I was so dumb
Answer:
Just count the unit squares
Step-by-step explanation:
If you learn this they may call u dumb but if your beginner then count the squares
heeeeeeeeeeeeeeeeelp
Answer:
230 cm squared
Step-by-step explanation:
Split the shape into a triangle and a rectangle
The area of a triangle is base x height / 2
20 x 9= 180/2= 90 (9 because you do 16-7 to find height of triangle)
Find the area of the rectangle=
7 x 20= 140
Add them up
140+90= 230cm squared
I hope this helped :)
Answer:
230 cm squared
Step-by-step explanation:
Calculate the mean and standard deviation of the data set ...
Answer:
Mean: 12.9
Standard deviation: 14.8
Step-by-step explanation:
The mean is calculated adding all of the values and dividing by the number of elements:
[tex]m=\frac{2+3+7+12+1+4+27+49+11}{9}=\frac{116}{9}=12.9[/tex]
to find the standard deviation, we first find the variance (which is defined as the sum of all the elements subtracting the mean and squared and then dividing by the total amount of elements):
[tex]v=\frac{(2-12.9)^2+(3-12.9)^2+(7-12.9)^2+(12-12.9)^2+(1-12.9)^2+(4-12.9)^2+(27-12.9)^2+(49-12.9)^2+(11-12.9)^2}{9}\\[/tex]
[tex]v=\frac{1978.89}{9}\\[/tex]
[tex]v=219.88[/tex]
Noe that we have the variance, we can calculate the standard deviation.
The stardard deviation is defined as the squared root of the variance:
[tex]standardDeviation=\sqrt{v}[/tex]
we substitute the variance:
[tex]standardDeviation=\sqrt{219.88} \\standardDeviation=14.8[/tex]
Thus, the answer is:
Mean: 12.9
Standard deviation: 14.8
answer to this please!
Answer:
-2²
Explanation:
Doing -k² is the same thing as -(k²), so the answer will be negative. However, (-k)² will still be positive. -2² will equal -4.
Brainliest??? Which inequality is represented by this graph.
Answer:
Step-by-step explanation:
D is the answer
Which of the following is false about investing with borrowed money? (5 points)
Can you please help me?
Answer:
Area: 7, because there are 7 squares.
Perimeter: 14.
Step-by-step explanation:
PLEASE HELP ASAP WILL GIVE BRAINLIEST IF CORRECT
what is 15x + 21x/2??
Answer:
25.5x
Step-by-step explanation:
Simply convert the fraction into a decimal and add.
21/2x = 10.5x
10.5x + 15x = 25.5x
If you want to keep it in fraction form, 15 is 30/2, so,
30x/2 + 21x/2 = 51x/2
Answer:
51x/2
Step-by-step explanation:
Add it like a normal fraction equation
Have them both with the same denominator of 2
30/2 + 21/2
Add the numerators
51/2
Now put the x into the numerator since it started as in the numerator
Answer: 51x/2
Hope this helps!
Divide the following amounts to the given ratio. A.)28kg in the ratio 2:5=. B.)1km in the room 19:1 =. C.)100 in the ratio 2:3:5 =.
What can be determined from the table? Check all that
apply.
The independent variable is the number of gallons.
Liters is a function of Gallons.
The equation l = 3.79g represents the table.
As the number of gallons increases, the number of
liters increases.
This is a function because every input has exactly
one output
Answer:
a, b, d, e
Step-by-step explanation:
Independent var is the # of gallons: true (generally graphs go in indep, dep format)
liters is a function of gallons: true
l = 3.79g is false, as 1 liter is not 3.79 gallons, but the other way around
as the number of gallons increases, the number of liters increases: true because this function has a positive slope
this is a function because every input has exactly 1 output: true
A function assigns the values. All the statements are true.
What is a Function?A function assigns the value of each element of one set to the other specific element of another set.
A.) The independent variable is the number of gallons.
The statement holds true, generally when a table is formed x is on the left side of the table which is an independent variable and y is on the right side which is the dependent variable.
B.) Liters are a function of Gallons.
The statement is true, generally when a table is formed x is on the left side of the table which is an independent variable and y is on the right side which is the dependent variable. And y is a function of x, similarly, liters is the function of gallons.
C.) The equation l = 3.79g represents the table.
The equation is true if we substitue the value of gallons in the place of g, the output will be the value of l. Thus, the equation is true.
[tex]\rm l = 3.79g\\\\l = 3.79(1\ gallons) \rightarrow l=3.79\ liters\\\\l = 3.79(2\ gallons) \rightarrow l=7.58\ liters\\\\l = 3.79(6\ gallons) \rightarrow l=22.74\ liters[/tex]
D.) As the number of gallons increases, the number of litres increases.
The statement holds true and can be observed in the table.
E.) This is a function because every input has exactly one output.
The statement holds true and can be observed in the table.
Hence, all the statements are true.
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A line is defined by the equation y = negative x + 3. Which shows the graph of this line?
Answer: The answer would be A.
The coordinates of the line are (0, 3) and (3, 0) hence, the line will pass through these points so, option A is correct.
What is graph?A graph is a structure made up of a collection of things, where some object pairs are conceptually "connected." The items are represented by mathematical abstractions known as vertices, and each pair of connected vertices is referred to as an edge.
Given:
y = negative x + 3
The above phrase can be written as,
y = -x + 3
Calculate the slope as shown below,
Slope = -1
The x-intercept can be calculated as,
0 = -x + 3 (y is zero at the x-axis)
x = 3
The x-intercept can be calculated as,
y = 0 + 3 (y is zero at the x-axis)
y = 3
Mark the coordinates (0, 3) and (3, 0) on the graph and join the points you will get the graph.
The graph is attached below.
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FOR 15 POINTS I WILL GIVE BRAINLEST IF YOU ARE CORRECT! What is the solution to the system that is created by the equation y = 2 x + 10 and the graph shown below? On a coordinate plane, a line goes through (negative 2, 0) and (0, 2). (–8, –6) (–4, –2) (0, 2) (2, 4)
The solution point is (4,2).
Step-by-step explanation:
Equation of straight line passing through the points (0,0) and (4,2) is given by
⇒ 2y = x ............ (1)
And the other straight line is y = - x + 6 .............. (2)
Now, solving equations (1) and (2) we get, y = - 2y + 6
⇒ 3y = 6
⇒ y = 2
And from equation (1) we get, x = 2y = 4
Therefore, the solution point is (4,2). (Answer)
Answer:
(-8,-6)
Step-by-step explanation:
This is the real answer for this question and this is a image of the graph
Brainliest please help! A storage bin is a rectangular prism. Its volume is 300 cm cubed.
The width of the prism is one-third its length.
its height is two-thirds its length.
Determine the dimensions of the bin.
Answer:
∛50 cm, 2∛50 cm, 3∛50 cm
Step-by-step explanation:
V= wlh
V=300 cm³
w= 1/3l
h= 2/3l
---------
l*1/3l*2/3l=3002/9l³=300l³= 1350l= ∛1350= 3∛50 cmw= 1/3*3∛50= ∛50 cmh= 2/3*3∛50= 2∛50 cmAnswer:
Length is 11.052cm
Width is 3.684cm
Height is 7.386cm
Step-by-step explanation:
Let length be x, width y and height Z
Width (y) = X/3 , height (z) = 2x /3
volume =xyz
volume = x(x/3)(2/3)x
Volume = (2/9)x³
But Volume =300
300= (2/9)x³
300/(2/9) = x³ (make x³ the subject to find x )
1350 = x³
x=3√(1350)
x=11.052cm
Length is 11.052cm
Width = x/3 =11.052 /3
= 3.684cm
Height = 2x/3 = 2(11.052) /3
= 7.368cm
You can check it by multiplying LWH to see if you get 300 (the volume)
A coin in flipped 4000 times What is the probability that d will land I N tails
Answer:
250
Step-by-step explanation:
1000/4000
Someone please help me with question 3.b)
Answer:
AM = 12.87 cmCM = 8.578 cmOD = 23.66 cmStep-by-step explanation:
Since the figure is symmetrical, angle MOA will be half of angle BOA, so will be 130°/2 = 65°. The tangent ratio is useful here. It tells you ...
tan(MOA) = MA/OA
AM = OA·tan(MOA) = 6·tan(65°)
AM ≈ 12.87 . . . cm
__
Similarly, ...
CM = 4·tan(65°)
CM ≈ 8.578 . . . cm
__
The cosine ratio is useful for finding OD.
cos(MOA) = OA/OM
OM = OA/cos(MOA) = 6/cos(65°)
Similarly, ...
DM = 4/cos(65°)
The length we want is OD, so ...
OD = OM +DM = 6/cos(65°) +4/cos(65°) = 10/cos(65°)
OD ≈ 23.66 . . . cm
6x + 1 ≥ 13 can u please solve this please i am stuck on it
Answer:
x ≥ 2
Step-by-step explanation:
Step 1: Isolate x
6x ≥ 12
Step 2: Divide both sides by 6
x ≥ 2
And we have our answer!
Answer:
x ≥ 2
Step-by-step explanation:
6x+1 ≥ 13
Subtracting both sides by 1
6x ≥ 13-1
6x ≥ 12
Dividing both sides by 6
=> x ≥ 2
Peggy has four times as many quarters as nickels she had $2.10 in all how many nickels and how many quarters did she have
Answer:
There are 8 quarters and 2 nickels
Step-by-step explanation:
4 quarters for every 1 nickel
This means that for every 1 dollar, there are 5 cents
Double the statement above
1.05 x 2 = 2.10
There are 8 quarters and 2 nickels
At the beach, 20% of people have white towels and 58% have blue towels. If
the rest have red, what percentage of the people at the beach have red
towels?
Answer: 22%
Step-by-step explanation: First, you have to add the percetages of the white and blue towels.
20+58=78
Now, you can simply subtract 78% from 100% to get your answer, 22%
does anyone know how to solve
this problem? any help would be amazing please!!
Answer:
x = 60 and y = 100
Step-by-step explanation:
As shown in the table, you have: x + y = 160
Otherwise, you have x:y = 3:5 or x = 3y/5
=> 3y/5 + y = 160
or 8y/5 = 160
or y/5 = 20
or y = 20*5 = 100
=> x = 160 - y = 160 - 100 = 60
=> x = 60 and y = 100
The missing term in the following polynomial has a degree of 5 and a coefficient of 16. Which statement best describes the polynomial? It is not in standard form because the degree of the first term is not greater than six. It is not in standard form because the degree of the first term should be equal to zero. It is in standard form because the exponents are in order from highest to lowest. It is in standard form because the coefficients are in order from highest to lowest.
Answer:
A.) It is not in standard form because the degree of the first term is not greater than six.
Step-by-step explanation:
I NEED. HELP PLEASE, THANKS! :)
Answer: A) 7 real zeros and 6 turning points at 0, 2, 4
Step-by-step explanation:
x⁷ - 6x⁶ + 8x⁵
The degree (largest exponent) is 7 so the maximum number of real zeros is 7.
Factor out x⁵
x⁵(x² - 6x + 8)
Factor the quadratic
x⁵(x - 2)(x - 4)
Set each factor equal to 0 and solve for x
x⁵ = 0 --> x = 0 (multiplicity of 5)
x - 2 = 0 --> x = 2
x - 4 = 0 --> x = 4
2/3y + 15 = 9
What are the steps for this question
Answer:
see below
Step-by-step explanation:
2/3y + 15 = 9
Subtract 15 from each side
2/3y + 15-15 = 9-15
2/3y = -6
Multiply each side by 3/2 to isolate y
3/2 * 2/3y = -6 *3/2
y = -9
Answer:
y = - 9
Step-by-step explanation:
2/3y + 15 = 9
Subtract 15 on both sides.
2/3y = 9 - 15
2/3y = - 6
Multiply both sides by 3/2.
y = - 6 × 3/2
y = -18/2
y = -9
if tom spins the spinner 80 times work out an estimate for the number of times the spinner will land on 3 please help me
Answer:
The estimated number of times the spinner will land on 3 is 20.
Step-by-step explanation:
The complete question is:
A four-sided spinner is provided. If Tom spins the spinner 80 times then work out an estimate for the number of times the spinner will land on 3.
Solution:
Assume that the four-sided spinner is unbiased.
That is all the four outcomes are equally likely to be selected.
The probability that the spinner lands on any of the four numbers is:
P(1) = P (2) = P (3) = P (4) = 0.25
It is provided that Tom spins the spinner n = 80 times.
The spinner can land on any of the four numbers independently.
The random variable X, defined as the number of times the spinner lands on 3, follows a Binomial distribution with parameters n = 80 and p = 0.25.
The expected value of X is:
[tex]E(X)=np[/tex]
[tex]=80\times 0.25\\=20[/tex]
Thus, the estimated number of times the spinner will land on 3 is 20.
A principal of $2000 is placed in a savings account at 3% per annum compounded annually. How much is in the account after one year, two years and three years?
Answer:
Step-by-step explanation:
After one year
A=p(1+r/n)^nt
=2000(1+0.03/12)^12*1
=2000(1+0.0025)^12
=2000(1.0025)^12
=2000(1.0304)
=$2060.8
After two-years
A=p(1+r/n)^nt
=2060.8(1+0.03/12)^12*2
=2060.8(1+0.0025)^24
=2060.8(1.0025)^24
=2060.8(1.0618)
=$2188.157
After three years
A=p(1+r/n)^nt
=2188.157(1+0.03/12)^12*3
=2188.157(1+0.0025)^36
=2188.157(1.0025)^36
=2188.157(1.0941)
=$2394.063
Amount in account after one year, two and three years are respectively $2,060 , $2,121.8 and $2,185.45
Given:
Principal amount = $2,000
Rate of interest = 3% = 0.03
Amount in account after one year
A = P(1+r)ⁿ
A = 2,000(1+0.03)¹
A = 2,000(1.03)¹
A = 2,000(1.03)
A = $2,060
Amount in account after two year
A = P(1+r)ⁿ
A = 2,000(1+0.03)²
A = 2,000(1.03)²
A = 2,000(1.0609)
A = $2,121.8
Amount in account after three year
A = P(1+r)ⁿ
A = 2,000(1+0.03)³
A = 2,000(1.03)³
A = 2,000(1.092727)
A = $2,185.45
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A given line has the equation .
What is the equation, in slope-intercept form, of the line that is perpendicular to the given line and passes through the point (0, 9)?
Answer:
y-6x = 9Step-by-step explanation:
The question is incomplete. Here is the complete answer.
A given line has the equation 2x + 12y = −1.
What is the equation, in slope-intercept form, of the line that is perpendicular to the given line and passes through the point (0, 9)?
General formula of equation of a line is exspressed as y = mx+c
m = gradient or slope
c = intercept
Step 1: we need to first get the slope of the given equation of a line by rewriting the equation in standard form y = mx+c
2x + 12y = −1
12y = -1-2x
y = -1/12-2x/12
y = -1/6 x - 1/12
From the equation above, it can be seen that the slope (m) of tghe line is -1/6.
Since both lines are perpendicular, the slope of the unknown line will be;
M = -1/m
M = -1/(-1/6)
M = 6
Step 2: We will find the intercept c by substituting the point (0,9) and the slope into the equation y = mx+c
9 = 6(0)+ c
c = 9
Stwp 3: We will find the equation of the line perpendicular to the given line by substituting the value of m and c into the equation y = mx+c
y = 6x+9
y-6x = 9
The equation in slope-intercept form, of the line that is perpendicular to the given line and passes through the point (0, 9) is y-6x = 9
Answer:
y-6x=9
Step-by-step explanation:
Fund the degree of the followung polynomials.
1. 5xyz
Answer:
3
Step-by-step explanation:
=> 5xyz
Degree of polynomial is summing up the powers of the variable, so it will give you the degree of polynomial
=> Degree of this polynomial = 1+1+1
=> 3
Simplify 16-3(8-3)^2÷5
Answer:
1
Step-by-step explanation:
PODMAS:-
16-3(8-3)²/5
=16-3(5)²/5
=16-3(25)/5
=16-3(5)
=16-15
= 1
Answer:
65
Step-by-step explanation:
=> [tex]\frac{16-3(8-3)^2}{5}[/tex]
=> [tex]\frac{13(5)^2}{5}[/tex]
=> [tex]\frac{13(25)}{5}[/tex]
=> 13 × 5
=> 65