A particular metal alloy a has 20% iron and another alloy b contains 60% iron. how many kilograms of each alloy should be combined to create 80 kg of a 52% iron alloy?

Answers

Answer 1
Let t and s represent the masses of 20% and 60% alloys respectively.

t+s=80, s=80-t

(0.2t+0.6s)/80=0.52  multiply both sides by 80

0.2t+0.6s=41.6, now using s=80-t in this equation gives us:

0.2t+0.6(80-t)=41.6  perform indicated multiplication on left side

0.2t+48-0.6t=41.6  combine like terms on left side

-0.4t+48=41.6  subtract 48 from both sides

-0.4t=-6.4  divide both sides by -0.4

t=16, since s=80-t

s=64

So 16kg of 20% alloy is mixed with 64kg of 60% allow to make 80kg of a 52% alloy.

Related Questions

Guys help me out with this one plizz

Answers

Getting two 6's in four rolls can happen in 6 ways. 4C2 = 6

The probability of getting two 6's is 1/36. Therefore,

6 times 1/36 = 1/6 or 0.16666666...

 Converting to a percent to the nearest tenth is 16.7%


Why is 8.8 classified as a rational number?

Answers

A rational number can be expressed as the ratio of two integers.

[tex]\frac{a}{b}[/tex]

Where a and b are integers and b is not equal to 0.

The rational number 8.8 can be expressed as two integers. Like [tex]\frac{8.8}{1}[/tex]

Someone help me please !

Answers

AE x BE = DE x CE

6x5 = 30

6 x DE = 30

DE = 30/6 =5

DC = DE +CE = 5+6 =11

Answer is C) 11

The velocity of a train, measured in meters per second, is described by vector t=(-1,-4). Find the direction the train is traveling using standard position

Answers

The vector (-1,-4) tells us that the train is moving 1 unit in the negative x-direction while moving 4 units in the negative y-direction. This vector makes an angle theta with the x-axis. We can find theta by using the inverse tan function. tan(theta) = 4/1 theta = inverse tan (4) = 75.96 Note that this is the angle below the x-axis. The angle in standard position must be measured from the positive x-axis, so we need to add 180 degrees. Therefore, the direction of the train in standard position is: 75.96 + 180 which equals 255.96 degrees.

Answer:

inverse tangent 4/1

75.96 + 180 bc 3rd quadrant which equals 255.96 degrees.

Step-by-step explanation:

round 256 degrees

The sum of three consecutive odd integers is 207. What are the​ integers?

Answers

Hey!

It says that it is the sum of 3 consecutive odd integers right?

So then we give these numbers some variables to work with like so...

x = 1st number
x + 2 = 2nd number
x + 4 = 3rd number

now set all of them equal to 207

x + x + 2 + x + 4 = 207
3x + 6 = 207
3x = 201
x = 67                     x + 2 = 69                 x + 4 = 71



a triangle has two sides of lengths 7 and 9.what value could the length of the third side be?

Answers

The side length has to be between 2 (=9-7) and 16 (=9+7). In both these corner cases the triangle will have collapsed to a line.

So the correct answers are B,C,D and E, and F is a corner case. Theoretically I suppose you have to count F in as a valid answer.

Answer:

13, 10, 8, 5

Step-by-step explanation:

2+7=9 9=9 the requirment is it has to be greater than the third length not equal to

If θ is in Quadrant III and cosθ -2/3, then sinθ = _____.


Answers

In 3rd quadrant, sine function is negative.
So, sin theta = sqrt(1-(2/3)^2) = - sqrt(5) / 3

Answer:

[tex]\sin\theta=-\dfrac{\sqrt{5}}{3}[/tex]

Step-by-step explanation:

If θ is in Quadrant III

[tex]\cos\theta=-\dfrac{2}{3}[/tex]

As we know in III quadrant cosine and sine both are negative.

using trigonometry identity

[tex]\sin\theta=-\sqrt{1-\cos^2\theta}[/tex]

[tex]\sin\theta=-\sqrt{1-(\frac{2}{3})^2}[/tex]

[tex]\sin\theta=-\sqrt{1-\frac{4}{9}}[/tex]

[tex]\sin\theta=-\dfrac{\sqrt{5}}{3}[/tex]

Hence, The value of [tex]\sin\theta=-\dfrac{\sqrt{5}}{3}[/tex]

How many 3 digit numbers can be made if no digit is repeated and the number can not begin with a zero?

Answers

digit #1 - 9 numbers (1-9)

digit #2 = 9 numbers (0-9 minus the first digit)

digit #3 = 8 numbers ( 0-9 minus the first 2 digits)

9*9*8 = 648 combinations

We have to select 3 digits out of 10 with the following conditions:
1) It can't start with 0
 2) repetition is not allowed.
 Let ABC this number:
A = 9 choices (out of 10, excluding 0, because it can't be 0)
B = 9 choices (out of 10 including 0, because it can be 0)
C= 8 choices (out of 10 because 2 digits already selected)
 The total ways to write this number are:
9 x 9 x 8 = 648 ways

Another method:
A can be written in ⁹C₁
B can be written in ⁹C₁
C can be written in ⁸C₁

Total ways: ⁹C₁ x ⁹C₁ x ⁸C₁ = 648 ways

Find the slope of the line on the graph. Write your answer as a fraction or a whole number, not a mixed number or decimal.

Answers

(-2,2) and (0,4)
slope = (4 - 2)/(0+2) = 2/2 = 1

answer
slope = 1

Answer: -3

Step-by-step explanation:

The points (1,1) (2,-2) plugged into slope formula m = y2 - y2/x2 - x1

-2 is y2

1 is y1

2 is x2

1 is x1

Subtract and simplify

If a cone and a sphere have the same radius and the same height what is the relationship among the volumes of the two shapes

Answers

V (cone) = πR².H/3

V (sphere) =(4/3).π.R³

Given: Same Radius and  cone a nd sphere same  H =2R. Replace H with 2R

V (cone) = πR².(2R)/3 = 2πR³/3

Then V (sphere)[ = (4/3).π.R³]= 2 V (cone) [ = 2πR³/3]

Answer:

the volume of the sphere will be 4 times the volume of the cone;

Step-by-step explanation:

The question is on volume comparison

Volume of a sphere=4/3 ×r³

Volume of a cone= /3×r²h

where r is the radius and h is the height

Apply the condition

If r=h=1 unit

Then volume of sphere will be= 4/3 × ×1³ = 4/3

And volume of the cone will be= /3 ×1²×1 =/3

We can see the volume of the sphere will be 4 times the volume of the cone;

4/3 = 4×/3

Which expression is equivalent to (2x^2 + 4x – 7)(x – 3)?
A. x(2x^2 + 4x – 7) + 3(2x^2 + 4x – 7)
B. x(2x^2 + 4x – 7) – 3
C. –3x(2x^2 + 4x – 7)
D. (2x^2 + 4x – 7)(x) + (2x^2 + 4x – 7)(–3)

Answers

The expression (2x² + 4x – 7)(x – 3) is equivalent to the expression (2x² + 4x – 7)(x) + (2x² + 4x – 7)(–3) option (D) is correct.

What is an expression?

It is defined as the combination of constants and variables with mathematical operators.

We have an expression:

= (2x² + 4x – 7)(x – 3)

After using the distributive property:

= (2x² + 4x – 7)(x) + (2x² + 4x – 7)(–3)

Distributed the whole term (2x² + 4x – 7) with (x - 3)

Thus, the expression (2x² + 4x – 7)(x – 3) is equivalent to the expression (2x² + 4x – 7)(x) + (2x² + 4x – 7)(–3) option (D) is correct.

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Jess observed that 60% of the people at a mall on a particular day shopped for clothes. If 2500 people at the mall did not shop for clothes that day, the number of people who shopped for clothes that day was ______.

Answers

If 60% shop for clothes, 40% do not shop for clothes.

p(40/100)=2500

40p=250000

p=6250 total people shopping, then:

p(60/100) is the number of people who shopped for clothes, since p=6250

6250(60)/100

3750 people shopped for clothes that day.

Answer:

3750

Step-by-step explanation:

3750

PLEASE ANSWER ASAP!!! WORTH 13 POINTS! I need help D:

Lucy's goal for her cycling class at the gym is to burn 450 calories in one hour. The number of calories (c) she actually burns in one hour varies no more than 45 calories. Which inequality below represents this scenario?

A) |c − 450| less than or equal to 45

B) |c + 450| greater than or equal to 45

C) |c − 45| less than or equal to 450

D) |c − 45| greater than or equal to 450

Answers

im  putting the 3rd one but im just guessing sry
i would say its c... yeah its c

Stan and hilda can mow the lawn in 30 min if they work together. if hilda works twice as fast as stan, how long does it take stan to mow the lawn alone?

Answers

Total Time = (Worker 1 * Worker 2) / (Worker 1 + Worker 2)
30 = (X*.5X) / (x + .5X)
30 = .5 X^2 / 1.5X
45 X = .5 X^2
Dividing both sides by X
45 = .5 X
X = 90
Stan will take 90 ,minutes and Hilda can do it in 45 minutes.
We can check this by putting the numbers in the formula:
30 = (45 * 90) / (45 + 90)
30 = 4,050 / 135
4,050 = 4,050
Answer is correct.


2x^3y + 18xy - 10x^2y - 90y Part A: Rewrite the expression so that the GCF is factored completely. (3 points)

Answers

Final answer:

To factor 2x^3y + 18xy - 10x^2y - 90y, find the GCF of the terms, rewrite the expression, factor out the GCF from the terms inside the parentheses, and simplify the expression.

Explanation:

To factor the expression 2x^3y + 18xy - 10x^2y - 90y, we can begin by finding the greatest common factor (GCF) of the terms. The GCF of the coefficients is 2, and the GCF of the variables is y.

So, we can rewrite the expression as 2y(x^3 + 9x - 5x^2 - 45).

Next, we can factor out the GCF from the terms inside the parentheses. The GCF of x^3, 9x, -5x^2, and -45 is x. Factoring out x, we get x(x^2 + 9 - 5x - 45).

Finally, we simplify the expression inside the parentheses. Rearranging the terms, we have x(x^2 - 5x + 9 - 45). Combining like terms, we get x(x^2 - 5x - 36).

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I really need help :(...............

Answers

Add the terms straight down (ie add like terms)

For the x terms
(3x) plus (-3x) = 3x-3x = (3-3)x = 0x = 0
The result being zero means the x terms effectively cancel out and go away

For the y terms
(-y) plus (3y) = -1y+3y = (-1+3)y = 2y

And finally the terms on the right hand side
(-1) plus (27) = -1+27 = 26

---------------------------------------------------------------

After adding the two equations, we end up with 0+2y = 26
which simplifies to 2y = 26. So the answer is choice D
Add the left hand side parts together and right hand side parts together.

3x - y - 3x + 3y = 2y
-1 + 27 = 26

So, 2y = 26 is the answer.

A caterer expects a minimum of 160 but no more than 192 people at a wedding. One fruit tray serves 16 people. The compound inequality represents x, the number of fruit trays the caterer should bring to the wedding.

160 ≤ 16x≤ 192

Which is a possible number of fruit trays the caterer might bring to the wedding?

A. 8
B. 10
C. 14
D. 16

Answers

Answer: B) 10

This is because once x is replaced with 16 in the equation, it becomes the number 160, which fits the equation. (it is equal to 160 and less than 192).

All the other numbers are either too large or too small to fit the equation. 

Answer:

b. 10

Step-by-step explanation:

I did the test

Jamie has invested $1500 in a savings account. Each month the account pays an interest of 3.8%. How much money will she have in her account 4 years later if she does not make any deposits or withdrawals (round to the nearest dollar)?
A) $1,257
B) $1,557
C) $1,559
D) $2,341

Answers

Use the formula I=PRT. P = Principal, R = Rate, and T= Time. In this case P = 1500, R = 3.8%, and T = 48 because 12 months in a year multiplied by 4 years. So at the end, I = 1500*3.8%*48. Then add the amount from the equation to her starting balance of 1500

Answer:

$4236.

Step-by-step explanation:

We have been given that Jamie has invested $1500 in a savings account. Each month the account pays an interest of 3.8%. We are asked to find the total amount Jamie will have in her account after 4 years.

We will use simple interest formula to solve our given problem.

[tex]A=P(1+rt)[/tex], where,

A = Final amount after t years,

P = Principal amount,

r = Interest rate in decimal form,

t = Number of years.

Let us convert our given rate in decimal form.

[tex]3.8\%=\frac{3.8}{100}=0.038[/tex]

Since the we have been given monthly interest rate, so we will convert the given rate to annual interest rate by multiplying 0.038 by 12.

Upon substituting our given values in above formula we will get,

[tex]A=\$1500(1+0.038*12*4)[/tex]  

[tex]A=\$1500(1+1.824)[/tex]

[tex]A=\$1500(2.824)[/tex]  

[tex]A=\$4236[/tex]  

Therefore, Jamie will have $4236 in her account after 4 years.

.........simplify 3^2*3^5

Answers

Using order of operations, we can see we should first solve for the exponents, and then multiply the exponent values by each other.


3²×[tex] 3^{5} [/tex]
9×243
2187

Another way to solve this is to add the exponents together and simply do [tex] 3^{7} [/tex]. We can only do that in this case, however, because the values are being multiplied by each other.

Either way we solve, we will get 2187 as our final answer.
Hello there!
[tex]#3^2 * 3^5# #(3*3) * (3*3*3*3*3)# #(3*3*3*3*3*3*3)# #3^7# = #2187# I hope I helped :)[/tex]

How to tell if there is a horizontal asymptote?

Answers

If the degree of the numerator is smaller than the denominator, then horizontal asymptote is 0, if the degrees are the same then you take the coefficients and divide then if the degree is greater on top usually there is no horizontal asymptote. 

To tell if there is a horizontal asymptote, for rational functions, compare the degrees of the numerator and denominator; if they are equal, the asymptote is the ratio of their leading coefficients. If the numerator's degree is less, the asymptote is at y=0; if greater, there is no horizontal asymptote. Polynomials do not have horizontal asymptotes.

To determine if a function has a horizontal asymptote, we look at the behavior of the function as x approaches infinity (x →∞). For rational functions, the degrees of the numerator and denominator play a crucial role. If the degree of the numerator is equal to the degree of the denominator, the horizontal asymptote is the ratio of the leading coefficients of the numerator and denominator. For instance, as x approaches infinity, the term with the highest power dominates and the constant terms become less significant, leading to the horizontal asymptote at y = 1.

In a scenario where the degree of the numerator is less than the degree of the denominator, the function will have a horizontal asymptote at y = 0, since the function approaches zero as x increases without bound. Conversely, if the degree of the numerator is greater than the degree of the denominator, no horizontal asymptote exists because the function grows without limit.

Remember, polynomials do not have horizontal asymptotes, as their values continue to increase or decrease indefinitely with x.

Help with these three problems? Please

Answers

6. add the averages then take that average

50+74 = 124, 124/2 = 62

answer: 62

8. first put all the numbers in order

4, 5 ,6 ,8 11, 12,14, 15, 23 ,23

 Find the middle number, since there are 10 numbers find the average of the 2 middle numbers

11+12 =23/2 =11.5

 Lower half data = 4, 5, 6, 8, 11

 The middle number of that set is Q1,

Q1=6

9

9, find q3

1, 2, 3, 5, 5, 6, 9

 Find middle number (5)

upper half data = 5, 6, 9

Q3=  5 , 6, 9 = 5+10 +15 = 30

so answer is $30

Quadrilateral $abcd$ is a trapezoid with $ab$ parallel to $cd$. we know $ab = 20$ and $cd = 12$. what is the ratio of the area of triangle $acb$ to the area of the trapezoid $abcd$? express your answer as a common fraction.

Answers

Draw a diagram to illustrate the problem as shown below.

The area of triangle acb is
A₁ = (1/2)*20*h = 10h

The area of trapezoid abcd is
A₂ = (1/2)*(20+12)*h = 16h

The ratio A₁/A₂ is
A₁/A₂ = (10h)/(16) = 5/8

Answer:
The ratio of triangle acb to the area of trapezoid abcd is 5/8.

A worker produced a total of 198 mousetraps during a 6 hour run with no rejects and no downtime. A report states that this worker produced at a rate of 2 mousetraps per minute. Based on the actual production, is the rate of 2 mousetraps per minute accurate?Exit Test

Answers

1 hr = 60 minutes....so 6 hrs = (6 * 60) = 360 minutes

198 / 360 = 0.55 mousetraps per minute

no, 2 mousetraps per minute is not accurate

Based on the actual production, the rate of 2 mousetraps per minute is not accurate.

What is Rate?

Rate of a quantity is the amount of that quantity with respect to some amount of another quantity.

If the quantity with respect to which the rate is measured is taken as single unit or one unit, then the rate is called unit rate.

Production of mousetraps by the worker in 6 hours = 198

Production of mousetraps by the worker in 1 hour = 198/6 = 33

That is, production of mousetraps by the worker in 60 minutes = 33

Production of mousetraps by the worker in 1 minute = 33/60 = 0.55

The worker produced mousetraps at a rate of 0.55 mousetraps per minute.

But the report states that this worker produced at a rate of 2 mousetraps per minute, which is not correct.

Hence the statement of report that the worker produced at a rate of 2 mousetraps per minute is not accurate, because he is only producing 0.55 mousetraps per minute.

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What is the measure of an exterior angle of a regular 11-sided polygon?

Answers

360 divided by 11 = 32.72 recurring

The measure of an exterior angle of a regular 11-sided polygon is 32.73°.

The measure of an exterior angle of a regular 11-sided polygon can be calculated using the formula:

60° divided by the number of sides.

In this case, for an 11-sided polygon, each exterior angle would measure 360° / 11 = 32.73°.

Which of the following is a key property of the linear parent function
A it is in quadratic ll and lV
B is has a slope of 1
C it is a curved line
D it does not go through the origin

Answers

it is definitely the letter B because of the liner parent function

Answer:

The correct option is B.

Step-by-step explanation:

The equation of linear parent function is

[tex]y=x[/tex]

Key property of the linear parent function are:

1. It is in quadratic l and lII.

2. It has a slope of 1.

3. It is a straight line.

4. It passes through the origin.

The graph of parent function is shown below.

In the given options only the statement " It has a slope of 1" is true.

Therefore the correct option is B.

Write the equation in standard form for the parabola with vertex (0,0) and directrix y=-6

Answers

Final answer:

To find the equation of a parabola with a vertex at (0,0) and a directrix of y=-6, we determine the focus is at (0,6), leading to the standard form equation of the parabola as y = 1/4x^2.

Explanation:

The question asks for the equation of a parabola in standard form given its vertex at (0,0) and directrix as y=-6. In parabolic equations, the standard form is usually y = ax^2 + bx + c for horizontal parabolas, or x = ay^2 + by + c for vertical parabolas. Given the vertex is at the origin (0,0) and the directrix is y = -6, this means the focus is at (0,6) because the distance from the vertex to the focus is equal to the distance from the vertex to the directrix but in the opposite direction.

For a parabola that opens upwards or downwards, the standard form is y = ax^2 (since the vertex is at the origin, b and c are 0). Given that the distance from the vertex to the focus (which is also the distance from the vertex to the directrix) is 6, the parabola opens upwards, and its focal distance (p) is 6. Hence, the value of 4p = 24, which leads us to conclude that a = 1/4. Therefore, the equation of the parabola is y = 1/4x^2.

8y - 1 = x 3x = 2y Solve the system of equations by substitution.

Answers

Solve for the first variable in one of the equations, then substitute the result into the other equation.
(1/11, 3/22)

There are (72)3 ⋅ 70 lambs on a farm. What is the total number of lambs on the farm?

Answers

72(3)= 216
216(70)= 15,120

15,120 lambs

Heyyy guys just thought I’d let y’all know the answer is *117649* if you (7^2)^3 that’s the answer and 7^0 is 0 soooo yeah!

The end points of AB are A(-2,-3) , B(3,2) point C lies on AB and is 2/5 of the way from A to . What is the coordinates of point C? Explain how you find your answer

Answers

check the picture below.

[tex]\bf \left. \qquad \right.\textit{internal division of a line segment} \\\\\\ A(-2,-3)\qquad B(3,2)\qquad \qquad 2:5 \\\\\\ \cfrac{AC}{CB} = \cfrac{2}{5}\implies \cfrac{A}{B} = \cfrac{2}{5}\implies 5A=2B \\\\\\ 5(-2,-3)=2(3,2)\\\\ -------------------------------\\\\[/tex]

[tex]\bf { C=\left(\cfrac{\textit{sum of "x" values}}{r1+r2}\quad ,\quad \cfrac{\textit{sum of "y" values}}{r1+r2}\right)}\\\\ -------------------------------\\\\ C=\left(\cfrac{(5\cdot -2)+(2\cdot 3)}{2+5}\quad ,\quad \cfrac{(5\cdot -3)+(2\cdot 2)}{2+5}\right)[/tex]
Final answer:

To find the coordinates of point C which divides line AB into a 2:5 ratio, use the section formula. Therefore, the coordinates are (-4/7, -11/7). This provides point C's location on the line segment AB.

Explanation:

The coordinates of C are determined through the section formula, which finds the coordinates of a point dividing a line segment into a specific ratio. In this case, the ratio is 2:5. To solve for the x-coordinate of C, the formula [(m*x2) + (n*x1)] / (m+n) is used, where m and n are the ratio values, x1 and x2 are the x-coordinates of points A(-2, -3) and B(3, 2). Using these, the x-coordinate of C is found to be (2*3 + 5*(-2)) / (2+5) = -4/7.

Similar calculations apply to solving for the y-coordinate of C: [(m*y2) + (n*y1)] / (m+n) = (2*2 + 5*(-3)) / (2+5) = -11/7.

Therefore, the coordinates of point C are (-4/7, -11/7). This is the point C on the line segment AB that is 2/5 of the way from point A to point B.

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Jacob and Isaiah are brothers. Their combined ages are 63. Jacob is 7 years older than Isaiah. How old are each of the boys?

Answers

There are two unknowns in this problem. To start, let's assign variables to each of them. Let x be the age of Jacob and y be the age of Isaiah. Then, we formulate equations based on the relationships stated.

x = 7 + y   --> eqn 1
x + y = 63  --> eqn 2

Substituting eqn 1 to eqn 2, then solve for x and y:

(7+y)+y = 63
7 + 2y = 63
2y = 63 - 7
2y = 56
y = 56/2
y = 28
x = 28 + 7 = 35

Therefore, Jacob is 35 years old, and Isaiah is 28 years old.

Final answer:

To solve this problem, set up a system of equations and solve for the variables. Isaiah is 28 years old and Jacob is 35 years old.

Explanation:

To solve this problem, we can set up a system of equations.

Let's say Isaiah's age is represented by x. Jacob's age is then represented by x + 7, since he is 7 years older than Isaiah.

We know that the sum of their ages is 63, so we can set up the equation: x + (x + 7) = 63.

Simplifying the equation gives us: 2x + 7 = 63.

Subtracting 7 from both sides of the equation gives us: 2x = 56.

Dividing both sides of the equation by 2 gives us: x = 28.

So, Isaiah is 28 years old, and Jacob is 28 + 7 = 35 years old.

Other Questions
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