A metalworker has a metal alloy that is 30% copper and another alloy that is 55% copper. How many kilograms of each alloy should the metalworker combine to create 100 kg of a 50% copper alloy? The metal worker should use (blank) kilograms of the metal alloy that is 30% copper and (blank) kilograms of the metal alloy that is 55% copper. (show your work)​

Answer:

The answer is 2000 g

Step-by-step explanation:

We use the following equivalence:

1 kg-------1000g

2kg----- X = (2kgx1000g)/1kg= 2000g

Answer:

y = sqrt(29)/2 - 1/2 or y = -1/2 - sqrt(29)/2

Step-by-step explanation:

Solve for y:

y^2 + y - 7 = 0

Add 7 to both sides:

y^2 + y = 7

Add 1/4 to both sides:

y^2 + y + 1/4 = 29/4

Write the left hand side as a square:

(y + 1/2)^2 = 29/4

Take the square root of both sides:

y + 1/2 = sqrt(29)/2 or y + 1/2 = -sqrt(29)/2

Subtract 1/2 from both sides:

y = sqrt(29)/2 - 1/2 or y + 1/2 = -sqrt(29)/2

Subtract 1/2 from both sides:

Answer: y = sqrt(29)/2 - 1/2 or y = -1/2 - sqrt(29)/2

Answer:

y=sqrt(29)/2-1/2, -sqrt(29)/2-1/2

Step-by-step explanation:

y^2+y-7=0

completing the square,

(b/2)^2=(1/2)^2=1/4

(y+1/2)^2=7+1/4

(y+1/2)^2=28/4+1/4

(y+1/2)^2=29/4

y+1/2=sqrt(29/4)

y=sqrt(29/4)-1/2

y=sqrt(29)/2-1/2

y=-sqrt(29)/2-1/2

The length of KD in triangle △AKM, with AK = 6 and KM = 10, and m∠AKM = 93° is 10, since KD is the height of a right triangle and KM is the hypotenuse.

The question asks to find the length of KD in triangle △AKM where KD is perpendicular to AM. Given AK = 6, KM = 10, and m∠AKM = 93º, we can solve for KD using trigonometric ratios.

Since KD ⊥ AM, we have a right triangle △KDM.

We know the hypotenuse KM and angle AKM, so we can use the sine function, where sin(AKM) = opposite/hypotenuse, to find the length of KD. The sine of angle AKM (which is slightly adjusted from 93º to 90º since we are looking for the height in a right triangle) gives us:

sin(90º) = KD/ KM

We know sin(90º) = 1 and KM = 10, so:

1 = KD / 10

Therefore, KD = 10.

Answer:

x > 68 and x < 84

Step-by-step explanation:

Answer:

5y² + 5y - 11

Step-by-step explanation:

The length of a wooden beam is as a function of y

L(y) = 6y² +  5y + 1

and a piece of length  y²  - 12 is cut off the remaining piece is

6y² +  5y + 1 - y²  - 12  =  5y² + 5y - 11

To find the remaining length of the wooden beam, subtract the length of the cut-off piece from the original polynomial. Simplify the expression to get the final answer: 5y² + 5y + 13 meters. This represents the remaining length of the beam.

Finding the Remaining Length of the Wooden Beam:

We start with the original length of the wooden beam given by the polynomial 6y² + 5y + 1 meters.

We need to subtract the length of the piece that was cut off, which is given by the polynomial y² - 12 meters.

First, write down the original length of the beam:

6y² + 5y + 1

Next, identify the length of the piece cut off:

y² - 12

Subtract the second polynomial from the first:

(6y² + 5y + 1) - (y² - 12)

Simplify the expression by combining like terms:

6y² - y² = 5y²

5y remains unchanged.

1 - (-12) = 1 + 12 = 13

So, the remaining length of the beam is:

5y² + 5y + 13

The remaining length of the wooden beam, expressed as a polynomial in y, is 5y² + 5y + 13 meters.

Answer:

6.50x + 5 = 21.25 is the answer

Step-by-step explanation:

x=2.5

The inequality that represents Tricia's goal to earn at least $21.25 through her $5 allowance and $6.50 per hour from babysitting is E = 5 + 6.50h ≥ 21.25, where h represents the number of hours she babysits.

The student's question asks for an inequality to represent the situation where Tricia receives a $5 weekly allowance and earns $6.50 for each hour she babysits. The goal is to earn at least $21.25 to buy a present.

Let's denote the number of hours Tricia babysits as h. The inequality representing her total earnings E from both her allowance and babysitting will be:

E = 5 + 6.50h ≥ 21.25

This inequality implies that the sum of Tricia's weekly allowance ($5) and her babysitting earnings ($6.50 per hour multiplied by the number of hours h) should be at least $21.25.

Step-by-step explanation:

Arthur got because a pizza is shared by 4 people. however only

2/3 of the pizza is there so it is divided by the four people.

The correct option is b.

The correct problem that can be solved by calculating 4 divided by 2/3 is determining the number of 2/3 cup servings of soup in 4 cups. By understanding how division of fractions work, we can see that there are 6 such servings in 4 cups.

The subject matter of the question is related to basic division and fractions. Specifically, it's asking about when we would need to find the result of 4 divided by 2/3. Given the answer choices, option B is the correct one. The question here is not about sharing a pizza or calculating the quantity of apples for pies, or the amount of sandwich eaten. It's rather about how many 2/3 cup servings fit within 4 cups of soup. When we do the division 4 ÷ 2/3, we're essentially figuring out how many 2/3s there are in 4. This concept can be a bit tricky because dividing by a fraction is equivalent to multiplying by its reciprocal. The reciprocal of 2/3 is 3/2, so 4 × 3/2 = 6. Hence, there are 6 servings of 2/3 cup soup in 4 cups.

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Answer:

[tex]\large \boxed{\text{5.00 lb}}[/tex]

Step-by-step explanation:

[tex]\begin{array}{rcl}1.20x + 3.60 & \leq & 9.60\\1.20x & \leq & 6.00\\x &\leq & \mathbf{5.00}\\\end{array}\\\text{Rammy can buy $\large \boxed{\textbf{5.00 lb}}$ of peaches.}[/tex]

Check:

[tex]\begin{array}{rcl}1.20(5.00) + 3.60 & \leq & 9.60\\6.00 + 3.60 & \leq & 9.60\\9.60 & \leq & 9.60\\\end{array}[/tex]

OK.

The number of pounds of peaches that Rammy can buy is 5 pounds.

Based on the information given in the question, the equation to solve the question will be:

1.20x + 3.60 ≤ 9.60

Collect like terms

1.20x ≤ 9.60 - 3.60

1.20x ≤ 6.00

Divide both side by 1.20

1.20x/1.20 ≤ 6.00/1.20

x ≤ 5.00

Therefore, the number of pounds of peaches that Rammy can buy is 5 pounds

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The solution of the equation is  [tex]x=\frac{11}{7}[/tex]

Step-by-step explanation:

To simplify an equation of x

∵ The equation is [tex]2x + \frac{1-x}{4}=3[/tex]

- Multiply all terms of the equation by 4 to cancel the denominator

 of the 2nd term in the left hand side

∵ The equation is [tex]4(2x) +4 (\frac{1-x}{4})=4(3)[/tex]

∴ 8x + (1 - x) = 12

∴ 8x + 1 - x = 12

- Add like terms

∴ (8x - x) + 1 = 12

∴ 7x + 1 = 12

- Subtract 1 from both sides

∴ 7x = 11

- Divide both sides by 7

∴ [tex]x=\frac{11}{7}[/tex]

The solution of the equation is  [tex]x=\frac{11}{7}[/tex]

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Answer:

300

Step-by-step explanation:

9 rounds it up

Answer:

Ultraviolet (UV) radiation.

Step-by-step explanation:

Mutagen is part of genetics, it is chemical or physical agent which are present in atmosphere and causes changes or mutation in the genetic materials i.e. in DNA (these changes can be permanent as well). Example of mutagen are radioactive substances, ultraviolet radiation, etc.

UV radiation is an electromagnetic radiation which is present in sunlight. It is a strong mutagen which is when absorbed by DNA can cause extreme damage, for example, uncontrolled division of skin cell can cause skin cancer, that's the reason why UV radiation is the most common mutagen to which we are exposed to when we are outside in the sunlight.

Science Quiz: 42.8571429%

Math Quiz: 39.1304348%

Take the amount of answers correct out of the total, divide it, and then multiply by 100. In this case, Science has a higher score.

The percentage of correct answers for the science quiz is 57.14%, while for the math quiz it's 60.87%. Therefore, the student had a higher percentage of correct answers on the math quiz.

You determine the percentage of correct answers on each quiz by dividing the number of correct answers by the total number of questions on each quiz respectively.

For the science quiz, you answered 4 out of 7 questions correctly since you missed 3 out of 7. The percentage of correct answers for the science quiz is thus (4/7)*100 = 57.14%.

For the math quiz, you answered 14 out of 23 questions correctly since you missed 9 out of 23. The percentage of correct answers for the math quiz is thus (14/23)*100 = 60.87%.

Therefore, you had a higher percentage of correct answers on the math quiz than on the science quiz.

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Answer:

Step-by-step explanation:

x - 12 = -4            add 12 to both sides

x - 12 + 12 = -4 + 12

x = 8

Answer:

12.1583333333 miles/hr.

Step-by-step explanation:

24 * 5 = 120  hrs

1459/120 = 12.1583333333

Answer:

12.158 miles/hour

Step-by-step explanation:

[tex]\frac{1459 miles}{5 days} = 291.8 miles/day\\\frac{291.8 miles}{1 day} x \frac{1 day}{24 hours} = 12.158 miles/hour[/tex]

To find the width of the rectangle, use the formula Width = Area ÷ Length. Given an area of 28 square meters and a length of 7 meters, the width is 4 meters.

The area of a rectangle is calculated using the formula:

Area = Length × Width

Given that the area is 28 square meters and the length is 7 meters, we can find the width by rearranging the formula:

Width = Area ÷ Length

Substitute the given values into the formula:

Width = 28 square meters ÷ 7 meters = 4 meters

Therefore, the width of the rectangle is 4 meters.

Answer:

10

Step-by-step explanation:

Mr morton initially had 60 bird houses.

He sold 10 to one store.

So left number of birdhouses = 60 - 10 = 50.

He sold them equally to 5 stores,

So, each of them will get [tex]\frac{50}{5}[/tex] = 10 bird houses.

So,

He sold 10 birdhouses to each of the other 5 stores.

Answer:

y=-20

Step-by-step explanation:

-6(y+5)-24=66

-6y-30-24=66

-6y-54=66

-6y=66+54

-6y=120

y=120/-6=-20

Answer:

No solution.

Step-by-step explanation:

2x+1/3=2x

1/3=2x-2x

1/3=0

no solution

Number of fruit baskets purchased by Mrs. William is 5

Given that  

Annual membership fee of store where Mrs. William shops = $30

Cost of one fruit basket which Mrs. William as gifts for her co-workers = $15

Total amount spent by Mrs. William = $150

Given that "b" represents number of basket purchased

Equation which models the above scenario is as follows

15b+ 30=105   ------ (1)

Where b represents number of fruit basket purchased by Mrs. William

Need to calculate number of fruit basket purchased by Mrs. William

For which we need to solve equation (1) for b  

On solving we get

15b+ 30 = 105    

On Subtracting 30 from both sides we get

15b + 30 – 30 = 105 – 30

=> 15b = 75

On dividing both sides by 15 we get  

[tex]\begin{array}{l}{\frac{15 b}{15}=\frac{75}{15}} \\\\ {=>b=5}\end{array}[/tex]

As variable "b" represents number of basket purchased, hence we can conclude that number of fruit baskets purchased by Mrs. William is 5

Answer:

The value of g'(10)=[tex]\frac{(-1)}{16}[/tex]

Step-by-step explanation:

Given function is f(x)=[tex]\frac{4}{x} + 2[/tex]

Take f(x)=y

y=[tex]\frac{4}{x} + 2[/tex]

Subtract 2 from both side.

y-2=[tex]\frac{4}{x}[/tex]

x=[tex]\frac{4}{y-2}[/tex]

The inverse of f(x) is written as [tex] \frac{4}{y-2}[/tex]

It is said as g is inverse of f

g(y)=\frac{4}{y-2}[/tex]

g(y)=[tex]\frac{4}{y-2}[/tex]

g(10)=[tex]\frac{4}{10-2}[/tex]

g(10)=[tex]\frac{1}{2}[/tex]

Differentiating both sides we get,

g'(y)=[tex]\frac{4(-1)}{(y-2)^{2}}+0[/tex]

g'(y)=[tex]\frac{(-4)}{(y-2)^{2}}[/tex]

To find g'(10)=[tex]\frac{(-4)}{(10-2)^{2}}[/tex]

g'(10)=[tex]\frac{(-1)}{16}[/tex]

To reciprocal the term for dividing, then multiply both fractions and get the solution to model  2/3 ÷ 3/4 = 8/9.

Arithmetic operations can also be specified by subtracting, dividing, and multiplying built-in functions. The operator that performs the arithmetic operation is called the arithmetic operator.

The numeral model is given in the question following:

⇒ 2/3 ÷ 3/4 = 8/9

According to the given question, the required solution would be as:

Find the reciprocal in this situation to divide by a fraction:

3/4 divided by 2/3

This would be: 2/3 x 4/3

When you multiply the components, you get 8/9.

Thus, to reciprocal the term for dividing, then multiply both fractions and get the solution.

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Final answer:

To show that 2/3 divided by 3/4 equals 8/9, we multiply 2/3 by the reciprocal of 3/4, which is 4/3, yielding the answer 8/9. This illustrates that division by a fraction involves multiplying by its reciprocal.

Explanation:

To explain how the model shows that 2/3 ÷ 3/4 = 8/9, we need to understand division of fractions and the concept of reciprocals. Division of fractions is the same as multiplying by the reciprocal of the divisor. The reciprocal of 3/4 is 4/3. Therefore, to divide 2/3 by 3/4, we multiply 2/3 by 4/3:

(2/3) × (4/3) = 8/9

This demonstrates that dividing by a fraction is equivalent to multiplying by its reciprocal. We can also use familiar scenarios to rationalize the answer. For instance, we know that half of one half (1/2 × 1/2) equals one quarter (1/4) and this helps us understand the process - we are scaling a number by another when we multiply fractions.

When discussing multiplication and division of fractions, it is useful to remember that these operations are fundamentally linked; division is essentially multiplication by a reciprocal. Hence, dividing 2/3 by 3/4 is the same as multiplying 2/3 by the reciprocal of 3/4, which is 4/3, resulting in 8/9.

Answer:

x=-5, y=6. (-5, 6).

Step-by-step explanation:

x=y-11

2x+3y=8

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

2(y-11)+3y=8

2y-22+3y=8

5y-22=8

5y=8+22

5y=30

y=30/5=6

x=6-11=-5

Answer:

110889

Step-by-step explanation:

Answer:

110,889 is the answer dude..

Final answer:

To factor −1/2 out of −1/2x+6, we identify the common factor, divide each term by −1/2, and write the expression as −1/2 times the simplified expression. The result is −1/2(x − 12).

Explanation:

To factor −1/2 out of −1/2x+6, we can think of pulling out the −1/2 as a common factor from both terms in the expression. Here's a step-by-step breakdown:

Applying these steps, we get:

So, −1/2x+6 factored with −1/2 taken out is −1/2(x − 12).

Answer:

C) -2(9+32n)

Step-by-step explanation:

(-18)-64n=-18-64n

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

A) -2(9-32n)=-18+64n

B) 2(9-32n)=18-64n

C) -2(9+32n)=-18-64n

D) 2(9+32n)=18+64n

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

The answer is C.

Answer:

the small cup of root beer can hold 8 fl. oz

Step-by-step explanation:

52-36=16

16/2=8

Each small cup holds 8 fl. oz. Together they hold 16 fl. oz. Plus 36 fl. oz. Which equals 52 fl. oz.

Answer:

on the top is 124 - 115 whille in the bottom is 115

Step-by-step explanation:

To calculate the percent change in the number of employees, use the formula (Change in Quantity / Original Quantity) × 100. The original number of employees is 115, and it increased to 124, resulting in a change of 9. The percent change is approximately 7.83%.

To find the percent change in the number of employees, you can use the following formula:

Percent Change (p) = (Change in Quantity / Original Quantity) × 100

In this case, the Original Quantity is the number of employees at the start of the year (115) and the Change in Quantity is the difference between the number at the end of the year (124) and the number at the start of the year (115).

So, we calculate Change in Quantity as 124 - 115 = 9.

Now, using the formula:

p = (9 / 115) × 100

Calculating this gives us the percentage change:

p = (9 / 115) × 100 ≈ 7.83%

The percent change in the number of employees is approximately 7.83%.

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Answer:

my 12 inch pito that pito good

Answer:

7x - 8y = 37

Explanation:

y+2 = ⅞(x-3) (distribute ⅞ -- x times 7/8, -3 times 7/8)

y+2 = ⅞x - 21/8 (subtract ⅞x from both sides)

y+2-⅞x = -21/8 (subtract 2 from both sides)

y-⅞x = -37/8 <--- result of -21/8 - 2

Multiply both sides by 8 to get ride of fractions

8y - 7x = -37 (rearrange)

-7x + 8y = -37

It's better to have a positive coefficient for x if you can.  So multiply both sides by -1.  That just means changing the sign of every term on both sides, you get

7x - 8y = 37

Answer:

The distance Shawn went is 40.

Step-by-step explanation:

Given:

N= 5 and M =6

Mountain hike = N = 5

Back down the other side = 2N+1 = 2×5 + 1 = 10 + 1 =11

From Mountain back to truck = 4M = 4×6 = 24

We need to find the total distance he went and can be calculate by adding Mountain hike with back down the other side and then from Mountain back to truck.

Total distance Shawn went = Mountain hike+ Back down the other side + From Mountain back to truck = 5 + 11 + 24 = 40

Hence Shawn went the distance of 40.