Math reality is more restrictive and logical, physical reality is more "free" and well-behaved.
How is "Mathematical Reality" different than physical reality?Mathematics are a logical construct, thus, everything in the "mathematical realty" must follow a certain logic.
For example, in math, always that you do a simplification (like rounding, applying a theorem, using an integration property, etc) you need to prove logically why you can do that.
While on physics we assume the reality is "nice" and we can always apply the simplifications. This is because most of the functions that represent physics are nice (continuous, differentiable, etc) functions, in the same way, most of the matrices are square matrices, and so on.
Concluding, for example in math the number 4.99999 is exactly 4.9999
On physics, if that same number represents a measure, for example:
4.99999 meters is practically equal to 5 meters.
Math reality is more restrictive and logical, physical reality is more "free" and well-behaved.
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Jack is in a marathon. He rides his bike 64 miles in 4 hours. How many miles does Jack ride his bike per hour?
Answer: 16mph
Step-by-step explanation:
64 miles divided by the 4 hours comes out to 16 per hour
Answer: 16 miles per hour
a group of 10 people have gotten together to play basketball. they will begin by dividing themselves into two teams of 5 players each. one team will wear red uniforms and the other will wear blue uniforms. in how many ways can this be done?
Answer:
9!
Step-by-step explanation:
Because a person who switch with 9 people, then another person switch with 8 people (because the first person was already counted), then another person who switch with 7 people (becsuse the first and the second person was already counted)... and you will get 9!. 9! is 9 factorial which is 9×8×7×6×5×4×3×2×1. :)
Tell what point is located at each ordered pair.
1. (3,-2)
4. (-7,-8).
2. (2,3)
5. (-4,4)
3. (-5,5)
6. (-5,0)
Show work please and thank you.
Step-by-step explanation:
2 things to remember :
the sum of all angles in a triangle is ashtrays 180°.
the sum of all angles around a point on one side of a line is also always 180° (because that represents a half-circle).
let's call the 3rd angle in the triangle "innerQ".
so,
180 = (4x + 13) + 19 + innerQ
180 = (7x + 2) + innerQ
as innerQ is also the supplementary angle of 7x + 2.
because of that, we can now say
(4x + 13) + 19 + innerQ = (7x + 2) + innerQ
4x + 13 + 19 = 7x + 2
4x + 32 = 7x + 2
30 = 3x
x = 10
so, the angle S = 4×10 + 13 = 40 + 13 = 53°
Help me with my problem please I NEED HELP!!!!!!!
The second
The correct answer is N ∈ line MN
The third
The correct answer is P ∉ line MN
The fourth
The correct answer is B ∉ line MN
How to interpret the symbolsThe symbols are interpreted as follows
∈ is interpreted as "is a member of"∉ is interpreted as "is not a member of"Given data
line MN
How to describe the location with respect to line MNThe first
It is already given that is M ∈ line MN
point M can be located in line MN
The second
The correct answer is N ∈ line MN
point N can be located in line MN
The third
The correct answer is P ∉ line MN
point P cannot be located in line MN it is off the line
The fourth
The correct answer is B ∉ line MN
point B cannot be located in line MN it is off the line
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What is the x value of the solution to the system shown?
2y = 2x + 12
2-y=4
Answer:
[tex]x = -8[/tex]
Step-by-step explanation:
[tex]\begin{cases}2y = 2x + 12\\2-y = 4\end{cases}[/tex]
It would be easier to start with the second equation.
[tex]2 - y = 4 \text{ // Add y and subtract 4}\\\to 2 - y - 4 = 4 - y - 4\\\to -2 = y[/tex]
From here, we can substitute [tex]y = -2[/tex] into the first equation, to solve for [tex]x[/tex].
[tex]2(-2) = 2x + 12\\\to -4 = 2x + 12 \text{ // Subtract 12 on both sides}\\\to -4 - 12 = 2x + 12 - 12\\\to -16 = 2x \text{ // Divide by 2}\\\to -\frac{16}2 = \frac{2x}2\\\to -8 = x[/tex]
Find the area of the polygon with th
Ay
7.
A(-2,3)
-4
C(-2,-3)
4
2
-2
4-
2'
4 X
B(3, -3)
The area of the triangle is 15 square units after using the distance formula.
What is a distance formula?
It is defined as the formula for finding the distance between two points. It has given the shortest path distance between two points.
The distance formula can be given as:
[tex]\rm d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}[/tex]
It is given that:
The triangle is shown on the coordinate plane.
Using the distance formula:
The height of the triangle:
[tex]\rm AC=\sqrt{(-2+2)^2+(-3-3)^2}[/tex]
AC = 6 units
Again using the distance formula:
[tex]\rm BC =\sqrt{(3-(-2))^2+(-3-(-3))^2}[/tex]
BC = 5 units
The area of the triangle = (1/2)6x5
The area of the triangle = 15 square units
Thus, the area of the triangle is 15 square units after using the distance formula.
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In an inverse variation,y = 4when x = 2.Write an inverse variatione quation thats hows there relationship between x and y . Write the equation using a decimal or an integer.
When y = 4 and x = 2, the inverse variation equation is y = 8/x
What is inverse variation?Inverse variation is variation in which the relationship between two variables is an inverse one. That is, while one variable increases, the other decreases.
How to write an inverse variation equation that shows there relationship between x and y.Given that in an inverse variation, y = 4 when x = 2. Since y and x have an inverse relationship, we have that
y ∝ 1/x, this implies that
⇒ y = k/x where k = constant of proportionality
Now, given that in an inverse variation, y = 4 when x = 2. Substituting the values of y and x into the equation, we have that
y = k/x
4 = k/2
k = 4 × 2
k = 8
So, susbstituting k = 8 into the equation for y, we have
y = k/x
y = 8/x
So, the inverse variation equation is y = 8/x
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In 11 years, John's age will be 5 less than 5 times his current age. How old is he?
If xrepresents John's current age, which of the following equations could be used to solve this problem?
Answer:
x=4
Step-by-step explanation:
solve for r -17= 2/3r
Answer:r=51
Step-by-step explanation:
Answer:
r = 51
Step-by-step explanation:
r - 17 = [tex]\frac{2}{3}[/tex] r ( multiply through by 3 to clear the fraction )
3r - 51 = 2r ( subtract 2r from both sides )
r - 51 = 0 ( add 51 to both sides )
r = 51
A cell phone company charges its customers $40 each month for owning a cell phone plan and $0.25 for
each minute the customer talks on the phone. These costs are modeled by the following equation:
C=25m +40, where Crepresents the total cost of the bill and m represents the number of minutes the
customer talked on the phone that month. Given this equation, how many minutes would the customer
have to talk on the phone for their monthly bill to be $84.25? (Hint: plug in 84.25 for the total cost, C, and
solve for the unknown, m).
Answer:
The customer would have 177 minutes to talk on the phone for their monthly bill to be 84.25
Step-by-step explanation:
Point of correction it's not C=25m +40 but it is
C=0.25m +40
Where,
C = $84.25➟ 84.25 = 0.25m + 40
Let's solve your equation step-by-step.
84.25=0.25m+40
Step 1: Flip the equation.
0.25m+40=84.25
Step 2: Subtract 40 from both sides.
0.25m+40−40=84.25−40
0.25m=44.25
Step 3: Divide both sides by 0.25.
0.25m/0.25 = 44.25/0.25
m=177
∴ The customer would have 177 minutes to talk on the phone for their monthly bill to be 84.25
19 1/5 - 11 1/11?????????
let's firstly convert the mixed fractions to improper fractions and then subtract.
[tex]\stackrel{mixed}{19\frac{1}{5}}\implies \cfrac{19\cdot 5+1}{5}\implies \stackrel{improper}{\cfrac{96}{5}} ~\hfill \stackrel{mixed}{11\frac{1}{11}}\implies \cfrac{11\cdot 11+1}{11}\implies \stackrel{improper}{\cfrac{122}{11}} \\\\[-0.35em] ~\dotfill\\\\ \cfrac{96}{5}~~ - ~~\cfrac{122}{11}\implies \stackrel{\textit{using the LCD of 55}}{\cfrac{(11)96~~ - ~~(5)122}{55}}\implies \cfrac{1056~~ - ~~610}{55} \\\\\\ \cfrac{446}{55}\implies {\LARGE \begin{array}{llll} 8\frac{6}{55} \end{array}}[/tex]
Kinsley went rock climbing at Red River Gorge. At noon, she was at an elevation of 76 feet. Then, she climbed 28 feet higher to reach the peak.
What was Kinsley's elevation at the peak?
Answer:
Step-by-step explanation:
28 + 76=
104
Her elevation is 104 at the peak.
How do you solve this −6x−16<2x
Answer:
x >-2
Step-by-step explanation:
subtract 2x from both sides
-6x - 16 - 2x < 0
subtract 2x from 6x
-8x - 16 < 0
add 16 to both sides
-8x < 16
divide by -8
x> -2
what is the inverse of (x) = [tex]\sqrt{x+9}[/tex] x[tex]\geq[/tex] -9
f−1(x)=(x−9)2, x≥9
f to the power of negative 1 end exponent left parenthesis x right parenthesis equals left parenthesis x minus 9 right parenthesis squared, , , x is greater than or equal to 9
f−1(x)=−(x−9)2, x≤9
f to the power of negative 1 end exponent left parenthesis x right parenthesis equals negative left parenthesis x minus 9 right parenthesis squared, , , x is less than or equal to 9
f−1(x)=x2−9, x≥0
f to the power of negative 1 end exponent left parenthesis x right parenthesis equals x squared minus 9, , , x is greater than or equal to 0
f−1(x)=x2−9, x≤0
The inverse of [tex]f[/tex], denoted [tex]f^{-1}[/tex], is such that
[tex]f\left(f^{-1}(x)\right) = x[/tex]
Given [tex]f(x)=\sqrt{x+9}[/tex], we have
[tex]f\left(f^{-1}(x)\right) = \sqrt{f^{-1}(x) + 9} = x[/tex]
Solve for [tex]x[/tex].
[tex]\sqrt{f^{-1}(x) + 9} = x[/tex]
[tex]\left(\sqrt{f^{-1}(x) + 9}\right)^2 = x^2[/tex]
[tex]f^{-1}(x) + 9 = x^2[/tex]
[tex]f^{-1}(x) = x^2 - 9[/tex]
Note that [tex]f(x)\ge0[/tex], so we must also have [tex]f\left(f^{-1}(x)\right) = x \ge 0[/tex]. This makes the third choice the correct one.
A floor 5m by 20m is covered by square tiles
The number of tiles is mathematically given as
x=2500Tiles
This is further explained below.
How many tiles are needed??Generally, the equation for the Area of the floor is mathematically given as
A= 20*5
A = 100m^2
Where
20*20=400cm
Therefore no tiles needed is
x=100*10000/400
x=2500Tiles
In conclusion, the number of tiles is
x=2500Tiles
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CQ
\A floor 5m by 20m is covered by square tiles of side 20cm. How many tiles are needed?
What is 2m to the 4th power times 5m to the second power
Answer:
hope this helps if this is what you meant
10m6
Step-by-step explanation:
=2*m4*5*m2
=10*m6
=10m6
What are the slope of the two lines?
Can someone please help me really quick
The amount of the shed that Jack would have built when Kyle finishes the shed is 8/25.
How much shed would Jack have built?A fraction is a non-integer that is made up of a numerator and a denominator. The numerator is the number above and the denominator is the number below. An example of a fraction is 8/25. 8 is the numerator and 25 is the denominator.
When Kyle finishes building the shed, he would have finished building a fraction of 1/1 of the shed. S
So, the amount of shed, that Kyle still needs to build to complete the shed is 1 ÷ 5/8
= 1 x 8/5 = 8/5
The amount of shed that Jack will have built when Kyle finishes the shed is:
8/5 x 1/5 = 8/25
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Cara used 4 1/6 sheets of construction paper to make 1/6 of her poster borad project. At that rate, how many sheets will she use for the whole project?
Based on the number of sheets of construction paper that Cara uses to make 1/6 of her project, the number of sheets for the whole project would be 25 sheets
How to find the number of sheets needed?Cara will use 4¹/₆ sheets of construction paper for 1/6 of her poster board project so to find the sheets needed for the whole project, use direct proportion.
4¹/₆ sheets of construction paper : 1/6 of project
x sheets of construction paper : 1
1/6 × x = 4¹/₆
1/6x = 4¹/₆
x = 4¹/₆ ÷ 1/6
x = 25/6 x 6/1
x = 25 sheets
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how do i right it please help
The contrapositive statement is:
If x ≠ 2, then x^2 ≠ 4
And it is false.
How to write the contrapositive statement?
First, we have two propositions:
p = "x^2 = 4"
q = "x = 2"
The contrapositive statement is:
¬q → ¬p
The negation of the propositions are:
¬q = "x ≠ 2"
¬p = "x^2 ≠ 4"
Then the contrapositive statement with the given propositions is:
If x ≠ 2, then x^2 ≠ 4
Now, is this statement true?
No, because we can have:
x = -2 (which is different than 2, so the hypothesis is true)
and x^2 = (-2)^2 = 4
Then the conclusion is false, so the statement is false.
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17. Callie's cat lost 41/2 pounds before having
surgery. Two weeks after having surgery, her
cat gained 2 7/8 pounds. What was the total
change in weight of Callie's cat?
The total change in the weight of Callie's cat will be - 1 5/8 pounds.
Callie's cat lost weight = 4 1/2 pounds
Lost = 9 / 2 pounds
Cat gained the weight = 2 7/8 pounds
Gained = 23 / 8 pounds
Net change = - 9 / 2 pounds + 23 / 8 pounds
= - 36 / 8 pounds + 23 / 8 pounds
= - 13 / 8 pounds
= - 1 5/8 pounds
She lost the net weight of 1 5/8 pounds.
Therefore, the total change in the weight of Callie's cat will be - 1 5/8 pounds.
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Ill need asap please
D. 37.8204
A negative absolute value is always positive.
Answer:
d) 37.8204
Step-by-step explanation:
Given that,
→ |-18.531| + |-19.2894|
Let's solve the problem,
→ |-18.531| + |-19.2894|
→ 18.531 + 19.2894
→ 37.8204
Thus, option (d) is correct.
ABC=40 and Bd is angle bisector of ABC what is Y= ?
The measure of angle ABD is 20 degrees and this can be determined by using the properties of the angle bisector.
Given :
ABC = 40 and BD is the angle bisector of angle ABC.
The following steps can be used in order to determine the angle ABD:
Step 1 - According to the given data, BD is the angle bisector of angle ABC.
Step 2 - An angle bisector bisects the angle into two equal parts.
Step 3 - So, the measure of angle ABD is calculated as:
So, the measure of angle ABD is 20 degrees.
please just solve this, I'm confused.
The quotient of each of the expressions are:
a. 1⅖ / -1/5 = -7
b. -0.4 ÷ 0.25 = 1.6
c. 7/8 ÷ -3/4 = -7/6
d. 0.7 ÷ -1 1/6 = -0.6
How to Find the Quotient?Quotient is the result you get after dividing one quantity by another. For example, the quotient of a and b is a/b.
Find the given quotient as shown below:
a. 1⅖ / -1/5
Convert mixed fraction to improper fraction
7/5 / -1/5
Change the division sign to multiplication and turn the fraction upside down
7/5 × (-5/1)
= -(7 × 5)/(5 × 1)
= -(7 × 1)/(1 × 1)
= -7/1
= -7
b. -0.4 ÷ 0.25
-0.4/0.25
= 1.6
c. 7/8 ÷ -3/4
Change the division sign to multiplication and turn the fraction upside down
7/8 × -4/3
= -(7/8 × 4/3)
= -(7 × 4)/(8 × 3)
= -(7 × 1)/(2 × 3)
= -7/6
d. 0.7 ÷ -1 1/6
0.7 ÷ -7/6
Change the division sign to multiplication and turn the fraction upside down
0.7 × -6/7
0.1 × -6/1
= 0.1 × -6
= -0.6
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Write a polynomial function with rational coefficients and the given roots.
-i, 4 i
The polynomial function is x²- 3xi + 4
What are polynomial functions ?In mathematics, polynomial function can be defined as the equation which consist of coefficient, variables and exponents. A polynomial equation has positive numbers as their exponent which is also known as its degree. All the equations such as quadratic equation, cubic equation which has non negative number as their powers are part of polynomial equation.
Types of polynomial equations :
Monomial equationBinomial equationCubic EquationsLinear PolynomialQuadratic PolynomialSome examples of polynomial equation are :
2x+53x = 93x² + 5x+19(x-3)³According to question,
roots are -i , 4i
Thus the factors are :
(x - (-i) ) ( x - (4i) )
=> ( x + i )( x - 4i )
=> x²- 4xi + xi - 4i²
=> x²- 3xi + 4 ( as i² = -1)
Thus polynomial function for given roots is x²- 3xi + 4
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you conduct a survey of your small town about having a townwide gargae sale. of those surveyed, 56% are in favor and 44% are opposed. the actual percent could be 5% more or 5% less than the acquired results. write an absolute value equation for the least and greatest percentages that could be opposed. use x for the variable.
In the given statement is:
You conduct a survey of your small town about having a town wide gargae sale. of those surveyed, 56% are in favor and 44% are opposed. the actual percent could be 5% more or 5% less than the acquired results.
Using the absolute value function, we have that:
A. The least percentage is of 39% and the greatest is of 49%.
B. Since the greatest percentage is below 50%, the statement conflicts with the survey data.
What is the absolute value function?
The absolute function is defined by:
|x| = x, x ≥ 0.|x| = -x, x < 0.It measures the distance of a point x to the origin.
For this problem, the difference between the percentage of opposed and 44% can be of at most 5%, hence the absolute value equation is:
|x - 44| = 5.
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P = IV
●
Here is what you know about the baseball field parking lot situation.
There are 9 lamp posts connected to this circuit.
Each lamp post has a 400 watt lamp installed.
The circuit is 120-volt and 20-amp.
Here is what you don't know, but can figure out:
How many watts does 9
lampposts require?
How many lamposts could this
circuit handle? HELP
Answer:
1M
Step-by-step explanation:
HOPE ITS HELP!! PLEASE STAY ALIVE!! :D
Find the total amount given the original price and tax rate. Round to the nearest cent if necessary
$31.69, 6%
The total amount including the tax rate is found as $34.
What is defined as the percentage?A percentage is a fraction of a whole articulated as just a number between 0 and 100. Nothing is zero percent, everything is 100 percent, half of everything is fifty percent, and nothing is zero percent. To calculate a percentage, divide the fraction of the total by the total and multiply by 100.For the stated conditions in the question.
The original amount = $31.69.
The tax rate is 6%.
The total mount will be the sum of original amount and tax price.
First calculated the tax price;
6% of 31.69 = 6×31.69/100
6% of 31.69 = 1.9014
Tax price = $1.9014.
Total price = original amount + tax price
Total price = $31.69 + 1.9014
Total price = 33.5914
Total price = $34 (Round to the nearest cent.)
Thus, the total amount is estimated as $34.
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pleaseeee help
round to the nearest decimal point
Answer:
the answer is 43.1
Step-by-step explanation:
because i searched it up