The differential equation for the amount of salt A(t) in the tank at the time (dA / dT) / (A / 100) = 0, A(0) = 30
It is Given that a large tank holds 400 gallons of water, in which 80 ponds of salt have been dissolved, given that pure water is pumped into the tank at a rate of 8 gallons/min. here we have to find the differential equation for the amount of salt in the tank at the time when the solution is well stirred. we have to multiply both 400 gallons of water and pumped water at the rate of 8 gallons/min.
dA / dT = Rin - Rout
Rin = 0
Rout = A(t) / 400 * 8
= A / 50
So,
dA / dt = Rin - Rout
dA / dt = 0 - A /50
After solving the differential equation we get
A(0) = 30
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emma says the gcf of 16 and 12 is 48.Her friend grace says the answer is 4. Who is right? Explain
Answer:
Grace
Step-by-step explanation:
48 is the LCM, 4 is the GCF
Jason has $3,561.05 in credit card debt. The annual interest rate on the unpaid balance is 18.2% compounded monthly. If Jason wants to pay off his credit card debt in 2 years, what is his monthly payment, assuming he makes no additional purchases on this card? (Suggestion: Use the formula for the present value of an ordinary annuity. Round your answer to the nearest cent.)
The monthly payment of Jason with no additional charge is found as $1,556.53.
What is meant by the compound interest?Compound interest is investment determined just on initial principal plus all previous periods' accumulated interest.A power of interest compounding is the ability to generate "interest on interest."Interest could be compounded at any time, from continuously to daily to annually.Compounding accelerates the growth of money.The formula for the calculation of the compound interest is;
CI = A - P
A = P(1 + r/100n)∧nt
Where,
CI = compound interestA = total amount after given timeP = principal amountT = total time in yearsn = number of time interest compoundedr = rate of interest in %The given values are;
P = $3,561.05 T = 2 yearsn = 12×2 = 24 times.R = 18.2%Put the values in the formula;
CI = $3,561.05(1 + 18.2/24×100)∧24×2 - $3,561.05
Simplifying;
CI = $3,561.05×1.43 - $3,561.05
CI = $5117.58 - $3,561.05
CI = $1,556.53
Thus, the monthly payment of with no additional charge is found as $1,556.53.
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FIRST PERSON TO ANSWER GETS BRAINLIEST
2. Melanie’s bank account balance is. She needs to pay $55 to her cell phone carrier and $80 to the landscaper. She also expects $250 from her sister to be added to her account.
(a) Write an expression Melanie can use to determine her bank account balance after paying these bills and receiving money from her sister.
(b) What is Melanie’s bank account balance after paying her bills and receiving money? Show any necessary work. Answer in a complete sentence
Answer:
Describe how anthropology challenges more commonly held notions of progress
Step-by-step explanation:
A paper company needs to ship paper to a large printing business. The paper will be
shipped in small boxes and large boxes. Each small box of paper weighs 50 pounds
and each large box of paper weighs 80 pounds. There were 4 more large boxes
shipped than small boxes and the total weight of all boxes was 1750 pounds. Write a
system of equations that could be used to determine the number of small boxes
shipped and the number of large boxes shipped. Define the variables that you use to
write the system.
The system of equations that could be used to determine the number of small boxes shipped and the number of large boxes shipped are:
50x+80y=1750
y = x+4 ,
where x represent the number of small boxes of paper and y represent the number of large boxes of paper.
We have:
Weight of small box of paper = 50 pounds
Weight of large box of paper = 80 pounds
Total weight of boxes = 1750 pounds
Let us consider that the number of small boxes of papers be x.
The number of large boxes of papers be y.
Then, according to question
50x+80y=1750
y = x+4
Therefore, the equations 50x+80y=1750 and y = x+4 can be used to determine the number of small boxes and large boxes of paper shipped.
where, x represent the number of small boxes of paper and y represent the number of large boxes of paper.
(Please help me I will give you extra points and the crown)
What is the special angle pair relationship between <1 and <3
Answer:
These pairs are called vertical angles, and they always have the same measure. ∠1 and ∠3 are vertical angles. ∠2 and ∠4 are vertical angles.
Step-by-step explanation:
PLEASE HELP!!!!!!!!!!!
(1 point)
Suppose U={1,2,3,4,5,6,7,8,9,10} is the universal set, and P={2,4,6,8,10}. What is P?
When compared to the universal setU={1,2,3,4,5,6,7,8,9,10}, the set P=2,4,6,8,10 has a prime that is equal to P'=1,3,5,7,9 as its element.
This is further explained below.
What is a set prime?Generally, Assigned the letter A (A prime), The components that are included in the Universal set but are absent from Set A are denoted by the letter A.
U={1,2,3,4,5,6,7,8,9,10}
P={2,4,6,8,10}
Therefore, the prime of the set P={2,4,6,8,10} in relation to the universal set U={1,2,3,4,5,6,7,8,9,10} is
P'={1,3,5,7,9}
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Suppose U={1,2,3,4,5,6,7,8,9,10} is the universal set, and P={2,4,6,8,10}. What is P'?
Write the equation of a line that has a slope of 1/2 and a y-intercept of (0,-4) in standard form.
Write the equation that contains the point (-5,2) and in which the slope equals 1/2 in standard form.
Write the equation of the line in which the x-intercept is 2 and the y-intercept is 8 in slope-intercept form.
Considering the definition of a line, you get:
the equation of a line that has a slope of 1/2 and a y-intercept of (0,-4) is y= 1/2x -4.the equation that contains the point (-5,2) and in which the slope equals 1/2 is is y= 1/2x +9/2.the equation of the line in which the x-intercept is 2 and the y-intercept is 8 is y=-4x +8.Linear equationA linear equation o line can be expressed in the form y = mx + b
where
x and y are coordinates of a point.m is the slope.b is the ordinate to the origin and represents the coordinate of the point where the line crosses the y axis.Equation of a line that has a slope of 1/2 and a y-intercept of (0,-4)In this case, you know:
The line has a slope of 1/2.The line passes through the point (0, -4).Substituting the value of the slope m and the value of the point in the expression of a linear equation, y = mx + b, the value of the ordinate to the origin b can be obtained:
-4= 1/2×0 + b
-4= 0 + b
-4 = b
Finally, the equation of the line is y= 1/2x -4.
Equation that contains the point (-5,2) and in which the slope equals 1/2In this case, you know:
The line has a slope of 1/2.The line passes through the point (-5, 2).Substituting the value of the slope m and the value of the point in the expression of a linear equation, y = mx + b, the value of the ordinate to the origin b can be obtained:
2= 1/2×(-5) + b
2= -5/2 + b
2 + 5/2= b
9/2 = b
Finally, the equation of the line is y= 1/2x +9/2.
Equation of the line in which the x-intercept is 2 and the y-intercept is 8Knowing two points (x₁, y₁) and (x₂, y₂) of a line, the slope m of said line can be calculated using the following expression:
m= (y₂ - y₁)÷ (x₂ - x₁)
Substituting the value of the slope m and the value of one of the points in the expression of a linear equation, y = mx + b, the value of the ordinate to the origin b can be obtained.
Being (x₁, y₁)= (2,0) [x-intercept] and (x₂, y₂)= (0,8) [y-intercept] , the slope m can be calculated as:
m= (y₂ - y₁)÷ (x₂ - x₁)
m= (8- 0)÷ (0 -2)
m= 8÷ (-2)
m= -4
Considering point 2 and the slope m, you obtain:
8= -4×0 + b
8= 0 +b
8=b
Finally, the equation of the line y=-4x + 8.
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What is the domain of the following function:
A.) x is all real numbers.
B.) –1 ≤ x ≤ 0
C.) x > 0
D.) –1 ≤ x ≤ 1
-1 is the domain of the following
67,000 rounded to the nearest ten thousand
When 67,000 is rounded to the nearest ten thousand then we get 70,000
When you round to the nearest 10 thousand. Find the number in the 10 thousand place, that would be the 6 in this case, now look at the number to the right of it, if that number is 5 or higher, then your 67,000 becomes 70,000.
If the number to the right of place value is lower than 5 then it would have been rounded to 60,000.
The digits in the thousands, hundreds, tens, and ones should be changed to 0 if the number is less than 5, but the other digits should remain the same. If it is 5 or more, increase the digit in the tens of thousands by 1 and replace the digits in the thousands, hundreds, tens, and ones with 0.
Hence the nearest round of to ten thousand is 70,000.
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The table represents some points on the graph of a linear function. What is the rate of change of y with respect to x for this function?
X y
5 2
10 3
15 4
20 5
The rate of change of y with respect to x for this linear function is 1/5 or 0.2
What is a linear function?A linear function is a type of function whose equation is graphically represented by a straight line on the cartesian coordinate. This ultimately implies that, a linear function is typically used for uniquely mapping an input variable to an output variable.
How to calculate the average rate of change?Mathematically, the average rate of change (slope) of a linear function can be calculated by using this formula;
[tex]Slope = \frac{Change\;in\;y\;axis}{Change\;in\;x\;axis}\\\\Slope = \frac{y_2\;-\;y_1}{x_2\;-\;x_1}[/tex]
Substituting the given points into the formula, we have;
Average rate of change = (3 - 2)/(10 - 5) = (4 - 3)(15 - 10)
Average rate of change = 1/5 or 0.2
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Henry is buying school supplies for the start of the school year for every 3 pencils he buys 2 pens if Henry buys 21 pencils how many total pencils and pens did Henry buy
Total number of pencils and pens bought by Henry = 35.
What is the unitary method of problem solving?
The unitary technique, in its most basic form, is used to calculate the value of a single unit from a specified multiple. The unitary approach can be used to complete it. Additionally, after determining the value of a single unit, we can multiply that value by the number of units needed to determine the value of the additional units. The concept of ratio and proportion is mostly applied using this way.
Given, for every 3 pencils, number of pens bought = 2
Therefore, every 1 pencil, number of pens bought = 2/3
Thus, for 21 pencils, number of pens bought = (2/3)*21 = 14
Therefore, total number of pencils and pens bought by Henry = 21 + 14 = 35.
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Suppose 54 gallons of water came out of a pipe in 9 minutes. What was the rate in gallons per minute?
Answer:
6 gallons per minute
Step-by-step explanation:
54 gallons came out in 9 minutes
54/9 = 6
the rate is 6 gallons per minute
what does x have to measure to make the lines parallel?
PLEASE HELP ASAP
Answer:
23) 30°
24) 12°
Step-by-step explanation:
23) Lines will be parallel if the co interior angles are supplementary.
∠3 + ∠5 = 180°
3x+ 25 + 4x - 55 = 180
3x + 4x + 25 -55 = 180
Combine like terms,
7x - 30 = 180
Add 30 to both sides,
7x = 180 + 30
7x = 210
Divide both sides by 7,
x = 210 ÷ 7
x = 30
24) If the lines are parallel, then the alternate interior angles are congruent.
∠7 = ∠2
11x - 36 = 8x
Add 36 to both sides,
11x = 8x + 36
Subtract 8x from both sides,
11x - 8x = 36
3x = 36
x = 36 ÷ 3
x = 12°
Which describes two similar triangles?
Two triangles for which a set of rigid motions can be used to show that all corresponding pairs of angles are equal and all corresponding pairs of sides are equal.
Two triangles for which a set of rigid motions can be used to show that all corresponding pairs of angles are equal and all corresponding pairs of sides are proportional.
Two triangles for which a set of rigid motions and dilations can be used to show that all corresponding pairs of angles are equal and all corresponding pairs of sides are equal.
Two triangles for which a set of rigid motions and dilations can be used to show that all corresponding pairs of angles are equal and all corresponding pairs of sides are proportional.
Answer:
Definition. Two triangles are similar if they have the same ratio of corresponding sides and equal pair of corresponding angles. If two or more figures have the same shape, but their sizes are different, then such objects are called similar figures.
Un barco navega 300 km al oeste, después 100 km al sur, al final de su viaje, que tan lejos está de su posición inicial? Elabora en tu libreta el dibujo y resuelve.
Answer: 400 KL you have to add 300 KL + 100 KL = 400 KL
An urn has 10 balls that are identical except that 6 are white and 4 are red. a sample of 7 is selected randomly without replacement. what is the probability that exactly 5 are white and 2 are red? what is the probability that at least 5 of the balls are white?
The question tests on probability and combinations.
To obtain the probability for selecting exactly two red and 5 white urns is:
If Wi and Ri are events for selecting the ith ball, apply the multiplicative rule to obtain:
=P(W1∩W2∩W3∩W4∩W5∩R1∩R2)
= P(W1)P(W2|W1)P(W3|W1∩W2)P(W4|W1∩W2∩W3)P(W5|W1∩W2∩W3∩ W4)P(R1|W1∩W2∩W3∩W4∩W5)P(R2|W1∩W2∩W3∩W4∩W5∩R1)
=6/10×5/9×4/8×3/7×2/6×4/5×3/4
= 1/10
The probability is 1/10.
Alternatively, use the Bayes theorem. This uses combinations. To get the probability for exactly 5 white and 2 red, obtain the chance for selecting 5 white balls and 2 red balls; 6C5 and 4C2.
(6C5×4C2)/10C7 = 6×6/120 = 1/10
The probability for at least 5 balls is obtained by the probability of either selecting 5 or 6 balls.
Using combination;
(6C6 X6C5)/10C7 = (1x6)/120 = 6/120 = 1/20.
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Solve the equation. If there is no solution, write no
solution (still show work).
| + 2| = 4
Answer: no solution
Step-by-step explanation:
any number raised to the 2nd power is said to be
Answer: squared
Step-by-step explanation:
What is the distance between (3,-4) and (5,6)
Answer:
Step-by-step explanation:
eedrfgrtrf3re3
ANSWER:
(3,-4)= -2 (5,6)= -10 and if you need to divide it would be 0.2
Step-by-step explanation:
What I did was get the y- axis number with each other and minus them so that would be (3, - 5) = -2 and then I did (-4 - 6)= -10 and then you can divided -2/-10= 0.2. Hope this helped!
Need help asap!!!!!!!!
If two numbers are multiplied, they are written as "a multiplied by b."
The answer is 9 3/7.
How to multiply?Multiplication is the product of 2 or more numbers/things.
Multiplying in math is equivalent to adding like groups.
The quantity of items in the group expands as we multiply.
A multiplication question has two factors, a product, and two factors. The factors and the product in the multiplication problem 6 x 9 = 54 are the numbers 6 and 9, respectively.
4 2/7 * 2 1/5 = 30/7 * 11/5
On simplifying,
= 6/7*11
= 66/7
=9 3/7
The answer is 9 3/7.
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A paper company needs to ship paper to a large printing business. The paper will be
shipped in small boxes and large boxes. Each small box of paper weighs 45 pounds
and each large box of paper weighs 75 pound's. A total of 24 boxes of paper were
shipped weighing 1410 pounds altogether. Write a system of equations that could be
used to determine the number of small boxes shipped and the number of large boxes
shipped. Define the variables that you use to write the system.
A total of 24 boxes of paper were shipped weighing 1410 pounds altogether, the system of equations are X + Y = 24, and 45X + 75Y = 1410 and the variables that you use to write the system X = 13 and Y = 11.
What is pound?The primary unit of sterling is the pound (sign: £), while the term "pound" is also frequently used to refer to the British pound or pound sterling in foreign settings.
The oldest currency that is still in the circulation and has been used continuously since its origin is sterling. After US dollar, euro, and Japanese yen, it is currently fourth most traded currency on the foreign exchange market. It makes up basket of currencies used to determine the value of IMF special drawing rights along with the other three currencies and the renminbi. Sterling is also fourth-most-held reserve currency in the world's reserves as of mid-2021.
Let X equal number of small boxes
Let Y equal number of big boxes
The first equation is: X + Y = 24 ( this shows that total number of boxes = 24)
The second equation is: 45X + 75Y = 1410 ( this is because small box weighs 24 pounds and big box weighs 75 pounds. The total weight of small boxes is 45 times weight of each individual box. And the total weight of second boxes is equal to 75Y.
When you solve system, X = 13 and Y = 11
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2x-5y = 2
3x - 7y=1
solve the system by elimination
Answer:
x= -9, y= -4
Step-by-step explanation:
Solving a linear equation can be done by two main methods, namely elimination and substitution. Elimination works by making the numerical value of one of the variable's coefficient the same, such that we can subsequently eliminate (or remove) the variable by subtracting or adding the two equations together.
Start by labelling the 2 given equations:
2x -5y= 2-----(1)
3x -7y= 1-----(2)
I will be working to eliminate the x term here, since we would be dealing with smaller numbers in this case. Eliminating the y term would also work.
The lowest common multiple of 2 and 3 is 6, thus multiply equation (1) by 3 and (2) by 2 so that the coefficient of x in both equations is 6. Then label the equations.
(1) ×3:
6x -15y= 6 -----(3)
(2) ×2:
6x -14y= 2 -----(4)
Since the coefficient of x in both equations is positive 6, we can subtract one equation from the other to eliminate the x term. If both coefficients have different signs (e.g. +6 and -6), the addition of the two equations would eliminate the term.
(3) -(4):
6x -15y -(6x -14y)= 6 -2
Expand:
6x -15y -6x +14y= 4
-y= 4
Divide both sides by -1:
y= -4
Then use substitution to find the value of y. Note that at this point, you could work to eliminate the y term from equations (1) and (2) to solve for x but it is commonly understood that when a question states solve by elimination, it is only for the first variable.
Substitute y= -4 into (1):
2x -5(-4)= 2
2x +20= 2
Subtract 20 from both sides:
2x= 2-20
2x= -18
Divide both sides by 2:
x= -9
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You invested a total of $30,000 at 3% and 4 1 2 % simple interest. During one year, the two accounts earned $1200. How much did you invest in each account?
Answer:
$20,000 at 4.5% simple interest
$10,000 at 3% simple interest
Step-by-step explanation:
[tex].045x + .03(30000 - x) = 1200[/tex]
[tex].045x + 900 - .03x = 1200[/tex]
[tex].015x + 900 = 1200[/tex]
[tex].015x = 300[/tex]
[tex]x = 20000[/tex]
$20,000 at 4.5% simple interest
$30,000-$20,000=$10,000 at 3% simple interest
PLSSS I NEED HELP ASAP
Answer:
19. x=20 y=7 20. x=10 y=25 21. x=12 y=31
Step-by-step explanation:
worksapce thingy
3x+17=5x-7
2x=24 x=12
53
no idea if im right .-.
Hello! Can you check these for me please :)
Triangles ADT and EDT are congruent by SSS rule and triangles BLG and PFX are congruent by SAS rule.
In triangle ADT and EDT, we get that:
AD = DE (given)
AT = ET (given)
DT = DT (common)
So, ΔADT ≅ Δ EDT (SSS congruency rule)
In triangle BLG and PFX, we get that:
BL = PF (given)
BG = PX (given)
∠ B = ∠ P (given)
So, ΔBLG ≅ Δ PFX (SAS congruency rule)
Therefore, we get that, triangles ADT and EDT are congruent by SSS rule and triangles BLG and PFX are congruent by SAS rule.
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Find the solution to the following system on the calculator. Round
your answer to two decimal places.
{y= 3x - 6 y = -5x + 14
Answer:
y=3x=16/3
Step-by-step explanation:
The table gives a set of outcomes and their probabilities. Let A be the event "the outcome is greater than 2". Find P(not A). Outcome Probability 1 0.22 2 0.08 3 0.13 4 0.33 5 0.24
Remember that
[tex]P(\text{not A)}=1-P(A)[/tex]We know that:
[tex]\begin{gathered} P(A)=0.13+\text{0}.33+0.24 \\ \rightarrow P(A)=0.7 \end{gathered}[/tex]This way,
[tex]\begin{gathered} P(\text{not A)}=1-0.7 \\ \rightarrow P(\text{not A)}=0.3 \end{gathered}[/tex]?:12 =7:14 what is the answer
Anna buys ice cream and oranges at the store.
She pays a total of $59.53.
She pays a total of $6.49 for the ice cream.
She buys 8 bags of oranges that each cost the same amount.
Write and solve an equation which can be used to determine xx, how much each bag of oranges costs.
Algebraic equation - The cost of each bag of Oranges = $6.63
What is Algebraic equation ?
An algebraic equation, sometimes known as a polynomial equation, in mathematics is a formula of the form P=0, where P is a polynomial with coefficients in some field, typically the field of the rational numbers.
Let the cost one bag of oranges be x
Given,
Total amount she pays = $59.53
Total amount she pays for ice cream = $6.49
Since the total amount for 8 bag of oranges = 8x
Therefore, the equation of the following will be
8x + 6.49 = 59.53
Now by solving the equation we get the cost of each bag of oranges
8x = 59.53 - 6.49
8x = 53.04
x = 53.04 / 8
x = 6.63
Hence, The cost of each bag of oranges will be $6.63
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Which of the following is a solution to the equation
2x² + 4x = 3 + 3x² ?
A) -1
B)
0
C) 3
D) 6
===========================================================
Reason:
Let's check to see if choice A is the answer. We'll replace each x with -1
2x^2 + 4x = 3 + 3x^2
2(-1)^2 + 4(-1) = 3 + 3(-1)^2
2(1) + 4(-1) = 3 + 3(1)
2 - 4 = 3 + 3
-2 = 6
We don't end up with the same thing on both sides, so x = -1 is not a solution to the equation.
--------------
Now try x = 0
2x^2 + 4x = 3 + 3x^2
2(0)^2 + 4(0) = 3 + 3(0)^2
2(0) + 4(0) = 3 + 3(0)
0 = 3
That's false as well, which allows us to rule out choice B.
--------------
Next up plug x = 3 into the equation
2x^2 + 4x = 3 + 3x^2
2(3)^2 + 4(3) = 3 + 3(3)^2
2(9) + 4(3) = 3 + 3(9)
18 + 12 = 3 + 27
30 = 30
We get the same thing on both sides so we have confirmed x = 3 is a solution.
--------------
There may be other solutions. If we tried x = 6, then it leads to 96 on the left hand side and 111 on the right hand side. That rules out x = 6 as a solution.