Answer:
22 ft
Step-by-step explanation:
Given a river that has a depth in January of -5 ft, and a depth in July of -27 ft, you want the difference between the depths in January and July.
DifferenceThe difference between two numbers is found by subtracting the second from the first:
(January depth) - (July depth) = (-5 ft) -(-27 ft)
= (-5 +27) ft = 22 ft
The difference between depths in January and July is 22 feet.
Sue picks a new password for her email that consists of 3 letters, 2 digits, and a special character (! or #). Letters and digits cannot repeat. How many different passwords are possible?
12
2,808,000
2,246,400
3120
There are different 2,808,000 passwords possible which are the correct answer would be option (B)
What is a permutation?A permutation is defined as a mathematical process that determines the number of different arrangements in a set of objects when the order of the sequential arrangements.
Sue picks a new password for her email that consists of 3 letters, 2 digits, and a special character (! or #) which is given in the question.
As per the given condition,
For the first letter, we have 26 options.
For the second letter, we have 25 options, because one letter is already used.
For the third letter, we have 24 options, because 2 letters are already used.
For the first digit, we have 10 options.
For the second digit, we have 9 options, because one is already used.
For the first special character (! or #), we have 2 options.
Then the total number of combinations is:
Combinations = 26×25×24×10×9×2 = 2,808,000
So if we can not repeat digits or letters, we can make 2,808,000 different passwords.
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Mark reads 42 pages of a book every 3/4hour wright a quation that models the relationship between x ,the number of hours Mark reads, and y, the number of pages of the book he reads
Equation is y= 56x that models the relationship between x ,the number of hours Mark reads, and y, the number of pages of the book he reads.
What is rate of change?The term rate of change (ROC) describes the rate at which something changes over time. Thus, it is not the amount of individual changes themselves but rather the acceleration or deceleration of changes (i.e., the rate). Rate of change is a tool used in finance to comprehend price returns and spot trend momentum.
Given Data
The hours are indicated by = x
The calculation for the number of pages is =y
Read 42 pages every [tex]\frac{3}{4}[/tex] hour
You can model the equation as follows:
y = mx +b
Rate of change = [tex]\frac{change in y}{change in x}[/tex]
Rate of change = 42 ÷[tex]\frac{3}{4}[/tex]
Rate of change = 42 ×[tex]\frac{4}{3}[/tex]
Rate of change = 56
Equation y= 56x
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cos^4x - sin^4x +1 = 2cos^2x
prove
Proved [tex]Cos^{4}x - Sin^{4}x + 1[/tex] = 2Cos²x
We will use the Pythagorean Theorem:
Sin²x + Cos²x = 1
from which we can get:
Sin²x = 1 - Cos²x
Also, note that the difference in the similarity of squares can be written:
A² - B² = (A - B)
We can use this with A = Sin²x and B = Cos²x as follows:
[tex]Sin^{4}x - Cos^{4}x[/tex]
= (Sin²x)² - (Cos²x)²
= (Sin²x - Cos²x) (Sin²x + Cos²x)
= Sin²x - Cos²x
= (1 - Cos²x) - Cos²x
= 1 - 2Cos²x
Now move the 1 and negative symbols to the left.
[tex]Cos^{4}x - Sin^{4}x + 1[/tex] = 2Cos²x
The trigonometric ratios are related to each other by equations called trigonometric identities.
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What mental math method will give you the correct answer to 136 + 98?
So basically 130+90=220 and 6+8=14. And 220+14=234.
please answer this question with method
Answer:
see explanation
Step-by-step explanation:
the volume (V) of the container is
V = 10 × 4 × 5 = 200 m³
change the dimensions of the box to m , to be same as container
l = 50 cm = 0.5 m , b = 40 cm = 0.4 m , h = 20 cm = 0.2 m
then
volume of box = 0.5 × 0.4 × 0.2 = 0.04 m³
Number of boxes that can be stored in container is
200 ÷ 0.04 = 5000
thus no more than 5000 boxes can be placed in the container
Assume that a new lithium isotope, 8Li, is identified. It is a trace isotope, meaning that it exists in a very tiny quantity. How will this discovery affect the atomic mass of lithium?
Since the isotope has only a very little amount in nature, it does not largely affect the atomic mass of lithium.
What is an isotope?The term isotope has to do with the atoms of the same element that do have the same atomic number but different mass numbers. The implication of this is that isotopes have the same number of protons but do not have the same number of neutrons.
Note that the average atomic mass of an atom is the weighted average of the atomic masses of all the isotopes of the compound. The isotopes that contribute greatly towards the atomic mass are those that have a larger percentage abundance.
Given that the new lithium isotope, 8Li identified is a trace isotope, meaning that it exists in a very tiny quantity, it does not any noticeable effect on the atomic mass of lithium.
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Jillian and Nikki each filled their cars with gasoline. The graphs below show the amount of gas in each car and the miles driven since filling the tank. A graph titled Jillian's Car has miles driven on the x-axis, and gallons of gas left on the y-axis. A line goes through (0, 22) and (100, 16). A graph titled Nikki's Car has miles driven on the x-axis and gallons of gas left on the y-axis. A line goes through points (0, 20) and (100, 16). Which statement is supported by the graphs? Jillian’s car holds more gasoline and gets better gas mileage. Nikki’s car holds more gasoline and gets better gas mileage. Jillian’s car holds more gasoline, but Nikki’s car gets better gas mileage. Nikki’s car holds more gasoline, but Jillian’s car gets better gas mileage.
The statement that is best supported by the graph is; Jillian's car holds more gasoline, but Nikki's car gets better gas mileage.
How to Interpret Linear Graphs?The total amount of gasoline each car tank can hold is shown on the left of each graph on the y-axis.
Jillian's car holds 22 gallons.
Nikki's car holds 20 gallons.
Jillian's car holds more gasoline.
Now we need to see which car gets better gas mileage. Getting better gas mileage means you can go farther with each gallon of gas.
With Jillian's car, after using 22 gallons of gas, you have gone 350 miles, and the gas tank is empty.
350 miles with 22 gallons is 350/22 = 15.9 miles per gallon.
With Nikki's car, you start with only 20 gallons. By the time you drive 350 miles, you still have some gas left. Not only did you start with less gas, 20 gal vs. 22 gal, but after driving the same distance, 350 miles, there is still some gas left in the tank, 6 gallons.
That means Nikki's car used 20 - 6 = 14 gallons to drive 350 miles. 350/14 = 25 miles per gallon.
The more miles per gallon you get, the better the mileage. Thus;
25 miles per gallon is better mileage than 15.9 miles per gallon.
Nikki's car has a smaller gas tank, but it gets better mileage.
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25.42 marked down by 33%
25.42 marked down by 33 % is 17.0314.
This is a question of percentages.
Percentage
A percentage is a number or ratio that can be expressed as a fraction of 100. If we have to calculate percent of a number, divide the number by the whole and multiply by 100. Hence, the percentage means, a part per hundred. The word per cent means per 100. It is represented by the symbol “%”.
Percentages have no dimension. Hence it is called a dimensionless number.
33 % of 25.42 is given by:-
(33/100)*(25.42) = (33*25.42)/100 = 838.86/100 = 8.3886
25.42 marked down by 33 % = 25.42 - 8.3886 = 17.0314.
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Change 23 out of 25 to a percentage
This how we change 23 out of 25 to a percentage
The numerator of a question is the number that appears above the bar; in this case, the numerator is 23.
The denominator is the number beneath the bar, and in this question, it is 25.
To calculate the value of a fraction, divide the numerator by the denominator.
Therefore, we must divide 23 by 25.
23/25 = 0.92
To determine the percentage, multiply the outcome by 100.
The percentage value will be obtained by multiplying 0.92 by 100.
0.92 x 100 = 92%
As a result, 92% is the answer to the question.
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f(n) = n - 7
f(-9k) =
Answer:
[tex]-9k-7[/tex]
Step-by-step explanation:
Replace n with -9k.
What is 903 Divided by 72 In Fraction form
Answer: The answer would be 12 39/72
Step-by-step explanation:
903 divided by 72, you'd get 12.5417. You could also express 903/72 as a mixed fraction: 12 39/72.
Factor out the GCF -27z^3-9z^4+18z^6
The simplified expression for -27z^3-9z^4+18z^6, using the greatest common factor, is given as follows:
9z³(-3 - z + 2z³).
How to factor an expression by GCF?To find a symbolic expression by the greatest common factor, we have to:
Find the greatest common factor of the numeric coefficients.Find the greatest common factor of the exponents.Then we multiply these GCFs.
For this problem, the numeric coefficients are given as follows:
27, 9 and 18, hence the GCF is of 9.
The exponents are given as follows:
z³, z^4 and z^6, hence the GCF is of z³, which is the expression with the lowest exponent.
Then the GCF of the expression is given as follows:
9z³.
To simplify the expression, each term of the expression is divided by 9z³, hence the factored expression is:
9z³(-3 - z + 2z³).
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can anyone decompose 240 - 135 = 105 ?
need new calculation after decomposing? help
The decomposition of 240 - 135 = 105 will be 15(16 - 9) = 15(7) = 105
What is decomposition?It should be noted that decomposition simply means breaking down of the numbers that are given or illustrated.
It should be noted that the numbers 240 - 135 = 105 all have a common factor of 15. This will be broken down as:
240 - 135 = 105
15(16 - 9)
= 15(7)
= 105
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5.45 divided by 65
If rounding show answer.
Step-by-step explanation:
1) 5.45 ÷ 65
2) 109/20 x 1/65=
3) 109/1300 or 0.08384615
The figure shows the design of a rectangular windowpane. The four horizontal lines are parallel. The measure of angle 6 is 53 degrees. What is the measure of angle 12? Write and solve an equation to find the answer.
∠6 and ∠12 are supplementary angles. That means, they add up to 180°
[tex]\angle6+\angle12=180\degree[/tex]Substitute ∠6 by 53° to find ∠12.
[tex]53+\angle12=180[/tex]Subtract 53 from both sides to find ∠12.
[tex]\begin{gathered} 53+\angle12-53=180-53 \\ \angle12=127\degree \end{gathered}[/tex]Answer: ∠12 = 127°.
Find the orthocenter of AABC.
A(3,5), B(6,5), C(5,3)
Answer:
(5, 4)
Step-by-step explanation:
What is Orthocenter?
A point where the altitudes of the triangle meet is known as the point of concurrency or simply the orthocenter of the triangle
A man's taxable income is $3.060 If tax is paid at 12%. How much is the man's net income
A man's taxable income is $3060 if tax is paid at 12%, then the man's net income is $3477.27
The taxable income = $3060
The tax percentage = 12%
Income tax is the a type of tax impose on income generated by businesses and individuals by the government
Consider the net income as x
Then,
12% of the income = x×(12/100)
Therefore the equation will be
x - x×(12/100) = 3060
x(1-(12/100) = 3060
x(1-0.12) = 3060
0.88x = 3060
x = 3060/0.88
x = $3477.27
Hence, a man's taxable income is $3060 if tax is paid at 12%, then the man's net income is $3477.27
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Expand and simplify the expression using properties of operations. 8(3x−7)
The expression 8 ( 3x - 7 ) when expanded gives 24xx - 56.
The cornerstone of mathematics is the theory of operations; we use it to compute and remember fundamental truths. The subsequent three characteristics are applied to addition and multiplication: Commutative Property, Associative Property, and Distributive Property.
The distributive property of binary operations in mathematics generalizes the distributive law, which states that in elementary algebra, equality is always true.
Consider the expression 8( 3x - 7 ),
Let's say y is equal to 8( 3x - 7 ).
By using the distributive property:
y = 8 × 3x - 8 × 7
y = 24x - 56
Therefore,
8( 3x - 7 ) = 24x - 56
Therefore, when the expression 8( 3x - 7 ) is expanded we obtain the expression 24x - 56.
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The length of a violin string varies inversely as the frequency of its vibrations. A violin string 14 inches long vibrates at a frequency of 450 cycles per second. Find the frequency of a 10-inch violin string.
The frequency of the 10 inch violin string will be 630 cycles per second or Hertz if the violin string 14 inches long vibrates at a frequency of 450 cycles per second.
As per the question statement, A violin string 14 inches long vibrates at a frequency of 450 cycles per second and we are supposed to find out the frequency of a 10-inch violin string.
We should be knowing that the length of a violin string varies inversely as the frequency of its vibrations.
f = m/l, where "f" is the frequency and "l" is the length and "m" is the constant number
450 = m / 14
m = 6300
Therefore New frequency = 6300 / 10 = 630 cycles per second
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The table shows a country’s average fuel consumption for light duty vehicles for several years. Let XP the number of years since 1985 so that executes five cents for 1990 and so forth. Find the linear regression model for the status. What does slope and regression model represent
Using linear function concepts, it is found that:
The slope is of 0.172 means that the fuel economy increases by 0.172 mpg each year.The intercept of 17.04 means that the fuel economy was of 17.04 mpg in 1985.What do the slope and the intercept of a linear function represent?The slope-intercept representation of a linear function is:
y = mx + b.
In which:
The coefficient m is the slope of the function, which is the rate of change of the function, that is, the change in y divided by the change in x.The coefficient b is the y-intercept of the function, which is the the value of y when the function crosses the x-axis(x = 0).For this problem, we will use a calculator from the points on the table to build a linear function of best-fit. The points are given as follows:
(5, 17.9), (10, 18.7), (15, 19.7), (20, 20.5), (25, 21.3).
Then the function is:
y = 0.172x + 17.04.
Then:
The slope is of m = 0.172, meaning that each year, the fuel economy increases by 0.172 mpg.The intercept of b = 17.04 was the fuel economy in 1985.What is the missing information?The table is missing, and is given by the image at the end of the answer.
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2x-5 > -11 or -10x - 6 ≥ 44
The solution of given inequalities are x > -3 and x ≤ 5.
How do you solve an inequality?When resolving an inequality, you can do one of the following: add the same amount to each side; deduct the same amount from each side; multiply or divide each side by the same positive amount. You must flip the inequality sign if you multiply or divide each side by a negative number.
Given inequalities are 2x - 5 > -11 and -10x - 6 ≥ 44.
To solve the first inequality,
2x - 5 > -11
Adding 5 on both sides,
2x - 5 + 5 > -11 + 5
2x > -6
Divide both sides by 2,
x > -3
To solve the second inequality,
-10x - 6 ≥ 44
Adding 6 on both sides,
-10x - 6 + 6 ≥ 44 + 6
-10x ≥ 50
Divide both sides by -10, and change the inequality sign
x ≤ 5
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fill in the blank question. julia wants to purchase a pair of headphones that are on sale for $42.79. the sales tax rate in her county is 6%. calculate the amount of sales tax julia will pay on the purchase. round to the nearest cent if necessary.
julia wants to purchase a pair of headphones that are on sale for $42.79. the sales tax rate in her county is 6%. then Julia have to pay $2.57 as sales tax on purchase of headphones.
Given,
The cost of headphones which Julia wants to purchase on sale = $ 42.79
The sales tax in Julia's country = 6%
We have to calculate the amount of sales tax Julia will pay on the purchase:
That is,
Sales Tax Value = Percentage of sales tax × Price of headphones
Sales Tax Value = (6 / 100) × 42.79
Sales Tax Value = 0.06 × 42.79
Sales Tax Value = 2.5674
Sales Tax Value ≈ 2.57
Therefore, Julia have to pay $2.57 as sales tax on purchase of headphones.
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please help. I will do anything.
Answer:
216 miles
Step-by-step explanation:
so the base fee is 18.99, subtract the total (219.87) by 18.99.
219.87-18.99=200.88
200.88 divided by 0.93 (charge for each mile driven)
200.88/0.93=216
thats a lot of miles.
PLEASE HELP ILL GIVE BRAINLIEST ITS TIMED
The value of x is 18 and the value of ∠A (interior angle) is 73°.
According to the given figure,
We have:
∠A = 6x-35°
∠B = 3x+53°
The two parallel lines have been cut by another line.
(Note that when a line divides two parallel lines then the sum of the interior angles on the same side is 180° and the alternate interior angles are equal to each other.)
So, we will have the following expression:
∠A + ∠B = 180°
(6x-35+3x+53)° = 180°
9x+18 = 180
9x = 180-18
9x = 162
x = 162/9
x = 18
Now, putting the value of x in ∠A,
∠A = 6x-35°
∠A = (6*18-35)°
∠A = (108-35)°
∠A = 73°
Hence, the value of x is 18 and the measurement of ∠A is 73°.
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Write an equation for the line that is parallel to the given line y=3/4x + 7 and that passes through the given point G(8,3)
The equation for the line that is parallel to the given line y=3/4x + 7 and that passes through the given point G (8,3) is y= (3/4)x -3.
As given in the question,
Equation of the given line :
y=3/4x + 7
Slope of the given line = (3/4)
Equation of line with slope (3/4) & passing through point (8, 3) is given by:
y - 3 = [tex]\frac{3}{4}[/tex] (x - 8)
⇒ 4 (y - 3) = 3 (x - 8)
⇒ 4y - 12 = 3 x - 24
⇒ 4 y = 3 x - 24 + 12
⇒ 4 y = 3 x - 12
⇒ y = (3/4)x - 3
Therefore, the equation for the line that is parallel to the given line
y=3/4x + 7 and that passes through the given point G (8,3) is y= (3/4)x -3.
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Given the diagram above and bd= 12 and ac= x+ 23, find ac
The value of AC when BD= 12 and AC = x+ 23 is 28
What is a line segment?A line segment can be defined as the part of a straight line that is being bounded by two different end points, and also contains all the points on the line between its endpoints.
From the information given, we have that line AD is a line with segments, line AB, line BC, line CD with B and C as the midpoints.
Given the points as;
AC = x + 23BD = 12BC = 14 + xAD = 26 + xWe have that;
AC + BC = AD
But line BD = 14 + x, we have;
Line AC = x + 23 - 14 + x
Line AC = 2x + 9
substitute the values into the equation
2x + 9 +12 = 26 + x
collect like terms
2x - x = 26 - 21
Add or subtract like terms
x = 5
But, we have that;
Line AC = x + 23
Line AC = 5 + 23
Add the values
Line AC = 28
Hence, the value is 28
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If a car has 80-liter petrol and after one hour driving the car use 6-liter petrol, how
much petrol will remain after x-hours driving?
Answer:
13.3 liters of petrol left
Step-by-step explanation:
80 ÷ 6 = 13.3
Enter the correct answer in the box.
What are the solutions of this quadratic equation?
x² = 16x - 65
Substitute the values of a and b to complete the solutions.
x = a + bi
x = a - bi
The solutions of the quadratic equation x² = 16x - 65 are:
x = 1/2 + 1/32i
x = 1/2 - 1/32i
What is the solution?We know that a quadratic equation is an equation that is of the sort ax^2 + bx + c = 0. Hence, the equation would be solved and it could have a complex root. By this I mean that the root of the equation could be a complex number as we have in the case of the equation here.
x² = 16x - 65 = 0
x² - 16x + 65 = 0
When we solve by the formula method;
x = -b ±√b^2 - 4ac/2a
x = -(-16) ±√(-16)^2 - 4 (1) (65)/2(16)
x = 16 ±√256 - 260/32
x = 16/32 ±√-4/32
x = 1/2 ± 1/32i
Thus
a = 1/2
b = 1/32
We then obtain;
x = 1/2 + 1/32i
x = 1/2 - 1/32i
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What is the converse of the following conditional statement?
"If a person is a teenager, then the person is 13 years old or older."
Determine the validity of the converse and give a counterexample if the converse is not valid.
If a person is not a teenager, then the person is not 13 years old or older. The converse is invalid; a counterexample is a person who is 12 years old.
If a person is 13 years old or older, then the person is a teenager. The converse is invalid; a counterexample is a person who is 20 years old.
If a person is a teenager, then the person is 13 years old or older. The converse is valid.
If a person is 13 years old or older, then the person is a teenager. The converse is valid.
The converse statement is "If a person is 13 years old or older, then the person is a teenager. The converse is valid" . Option D
What is a converse statement?The converse of a conditional statement is defined as a statement that is formed when the hypothesis and conclusion of a sentence are both reversed or interchanged.
If the conditional statement is expressed as a → b
The converse statement is referred to as b → a
It is important to note that the original statement must be a conditional statement for a converse statement to derived from it.
Given the conditional statement:
"If a person is a teenager, then the person is 13 years old or older."
The converse statement would be written as;
If a person is 13 years old or older, then the person is a teenager.
We can see that the converse statement is valid because anyone that is 13 or older is a teenager
Hence, the converse statement is valid. Option D
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2/3 times the quantity n plus 16
(n+16)
O(2n+16)
O(n-16)
O(16-n)
Answer:
24
Step-by-step explanation:
it just is, I don't know how I get this. I just did.
[tex]\frac{2n+48}{3}[/tex]