In a chemical compound there are three parts zinc for every 16 parts copper by mass. A piece of the compound contains 320 g of copper. Write and solve an equation to determine the amount of zinc in the chemical compound.

Answers

Answer 1

Total mass contains 320g copper. How many parts of 16g copper are there of the total mass of 320g copper? 320/16 = 20. There are 20 portions of 16g copper. (320/16) * 3 = 60g There are 60g of zinc in the compound.

Related Questions

Help me asap!!! :) please

Mark you a brainly!

Answers

30 /10 = 3

so multiply 9 by 3

9*3 = 27

9/10 = 27/30

a = 27

Rachel and Sabrina belong to different local gyms. Rachel pays $35 per month and a one-time registration fee of $15. Sabrina pays only $25 a month with a one-time registration fee of $75. Write an equation to represent Rachel's total cost, T, as a function of the number of months, m.

Answers

I believe it would be:
T= 35m+ 15

What is the measure of the smallest angle?

52°
61°
67°
69°

Answers

52 Degrees is the smallest measure :)

Answer:

52° is ur answer

Step-by-step explanation:

I just did the quiz so i know

Is m=0.75d-2 proportional?

Answers

no, a proportion will have a constant for the ratio m/d

If m = 0.75d, then ratio m/d = (0.75d)/d = 0.75

In this example, the ratio is (.75d-2)/d = 0.75 - (2/d).

Therefore, it is not proportional.

Answer:

No, the equation m=0.75d-2 does not represent proportional relationship.

Step-by-step explanation:

The given equation is

[tex]m=0.75d-2[/tex]

We need to check whether the given equation represents proportional relationship or not.

If variable y is proportional to variable x, then

[tex]y\propto x[/tex]

[tex]y=kx[/tex]

where, k is the constant of proportionality.

At x=0 the value of y is 0. It means, if a linear equation represents proportional relationship then it must be passes though the origin.

Substitute d=0 in the given equation.

[tex]m=0.75(0)-2[/tex]

[tex]m=-2[/tex]

The line passes through the point (0,-2).

Since the line does not pass through the origin, therefore it does not represent proportional relationship.

A Pitcher of fruit punch holds 2 gallons , If 9 people share the entire pitcher equally how much punch does ecah person get

Answers

You would do 2 divided by 9 to get that each person would have 2/9 of a gallon or .22 of a gallon. I hope this helps.

A package of breadcrumbs to feed the ducks at the duck pond costs $0.25. How many packages of bread crumbs could be bought with $23.50

Answers

23.50 divided by .25 = 94

How you find that out would be by dividing $23.50 by $0.25.

23.50÷0.25=94

You would be able to buy 94 packs of bread crumbs with $23.50.

there is a 20% markup on a tv if the tv is $450 before the markup what is the cost after the markup

Answers

Hello!
If the markup is 20% you would multiply $450 by .20 to get $90. Then you add $90 to $450

Here's a simpler version...
$450x.20=$90
$450+$90=$540

The answer would equal $540.

Hope this helped!

The answer is 540 multiply 20 by 450 then divide by 100 and add 90

the senior is having a car wash to raise money. They can wash about 35 cars in 5 hours. if they are washing the same number of cars each hour, how many cars do they wash in 1 hour

Answers

they wash about 8.6 cars in 1 hour

Hello!

your answer is 75 • $6 - $35

next time add the answers too for these questions that's why the other guy didn't give you the right answer

What's the radius of a circle with an area of 123 square feet? A. 6.26 ft. B. 39.17 ft. C. 26.32 ft. D. 3.14 ft.

Answers

the correct answer is A) 6.26

You are standing above the point (5,4)(5,4) on the surface z=15−(2x2+3y2)z=15−(2x2+3y2). (a) in which direction should you walk to descend fastest? (give your answer as a unit 2-vector.)

Answers

The direction you'll walk to descend fastest is obtained as follows:

[tex]u= \frac{-\nabla z(5,\ 4)}{||\nabla f(5,\ 4)||} \\ \\ = \frac{-\ \textless \ -4x,\ -6y\ \textgreater \ |_{(5,\ 4)}}{||\ \textless \ -4x,\ -6x\ \textgreater \ ||_{(5,\ 4)}} \\ \\ = \frac{\ \textless \ 20,\ 24\ \textgreater \ }{\sqrt{(-20)^2+(-24)^2}} = \frac{\ \textless \ 20,\ 24\ \textgreater \ }{\sqrt{400+576}} \\ \\ = \frac{\ \textless \ 20,\ 24\ \textgreater \ }{\sqrt{976}} = \frac{\ \textless \ 20,\ 24\ \textgreater \ }{4\sqrt{61}} = \frac{\ \textless \ 5,\ 6\ \textgreater \ }{\sqrt{61}} [/tex]

Final answer:

To descend fastest from the point (5,4) on the surface z=15-(2x^2+3y^2), you should walk in the direction of the negative gradient vector, normalized to be a unit vector, which is approximately <0.640, 0.768>.

Explanation:

To determine the direction in which you should walk to descend fastest from the point (5,4) on the surface z=15-(2x^2+3y^2), we can find the gradient of the surface at that point. The gradient vector will point in the direction of the steepest ascent, so the direction of the steepest descent is the opposite direction of the gradient vector.

First, calculate the partial derivatives of z with respect to x and y:
∂z/∂x = -4x
∂z/∂y = -6y
Next, evaluate these derivatives at the point (5,4):
∂z/∂x(5,4) = -4(5) = -20
∂z/∂y(5,4) = -6(4) = -24
The gradient vector at (5,4) is <-20, -24>. To get the direction of steepest descent, we take the negative of the gradient vector, which is <20, 24>.

Finally, normalize this vector to make it a unit vector (so it has a length of 1):
Length of gradient vector = √(20^2 + 24^2) = √(400 + 576) = √976 ≈ 31.24
The unit vector in the direction of steepest descent is <20/31.24, 24/31.24> ≈ <0.640, 0.768>.

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1.A system of two linear equations is graphed on a coordinate plane. If the system of equations has infinitely many solutions, which statement must be true?

A.On the graph, there is exactly one point (x,y) that satisfies both equations.

B.On the graph, any point (x,y) that satisfies one of the equations cannot satisfy the other equation.

C.On the graph, there are no points (x,y) that satisfy both equations.

D.On the graph, any point (x,y) that satisfies one of the equations must also satisfy the other equation.

2.Mark drank a total of 10 glasses of water and iced tea yesterday.

Each glass of water contained 8 ounces. Each glass of iced tea contained 12 ounces.

All together, he drank 96 ounces. The system of equations below models this situation.

x + y = 10
8 x + 12 y = 96

How many glasses of water did Mark drink yesterday?

A.3 glasses

B.4 glasses

C.5 glasses

D.6 glasses

Answers

You dint know what going to tell me Abe's and you can tell that she's hitting in the shower now I know I will ince and but 7. C is the answer

Mark drank 6 classes of water. :) im probably late on answering this, sorry

For integer values of a and b, b^a = 8. The ratio of a to b is equivalent to the ratio of c to d, where c and d are integers. What is the value of c when d = 10?

Answers

the only integer values to fit b^a = 8 would be 2^3, knowing this you can set up a proportion where
3:2 = c:10
c is then equal to 10/2 *3
15

To find the value of c when d = 10, we first need to determine the values of a and b. Given that b^a = 8, we know that 8 is the result of raising b to the power of a.

Since the question states that a and b are integers, there are a limited number of possibilities to consider. Let's examine the possible combinations of a and b that satisfy this equation: [tex]1^3 = 1 2^3 = 8 3^2 = 9[/tex](which is not 8) [tex]4^2 = 16[/tex] (which is not 8) [tex]5^1 = 5 6^1 = 6 7^1 = 7 8^1 = 8[/tex]From these calculations, we find that the only combination that satisfies the equation is a = 3 and b = 2. Now, let's consider the ratio of a to b and the ratio of c to d.

The ratio of a to b is a/b = 3/2. The question states that the ratio of a to b is equivalent to the ratio of c to d, which means: a/b = c/d Given that d = 10, we can substitute the value into the equation: [tex]3/2 = c/10[/tex] Next, we can cross-multiply to solve for c: [tex]3 * 10 = 2 * c 30 = 2[/tex] c Dividing both sides by 2, we get: c = 15 Therefore, when d = 10, the value of c is 15. In conclusion, when d = 10, the value of c is 15 based on the given equation and calculations.

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What are the answers for both drop downs the first one is asking for 3.113 and the second is asking for 1.2795

Answers

[tex]\bf \qquad \textit{Amount for Exponential Growth}\\\\ A=I(1 + r)^t\qquad \begin{cases} A=\textit{accumulated amount}\\ I=\textit{initial amount}\\ r=rate\to r\%\to \frac{r}{100}\\ t=\textit{elapsed time}\\ \end{cases}\\\\ -------------------------------\\\\ P(x)=3.113(1.2795)^x\implies \stackrel{A}{P(x)}=\stackrel{I}{3.113}(1+\stackrel{r}{0.2795})^{\stackrel{t}{x}}[/tex]

usually, the "r" above, is used as a "rate of increase".

but 1+r combined, can be referred as the "rate for the new size".

so, for example, if something is increasing at a rate of 25%, 1+0.25 or 1.25, the new size wil be 1.25 or 125% of the old size.

A 7 pound bag of grass seed covers 2,000 square feet. How many pounds would be needed to cover 35,000 square feet? Round your answer to the nearest pound.

Answers

5,000 pounds..hope this helps

35000 / 2000 = 17.5

17.5 * 7 = 122.5 pounds round to 123 pounds are needed

What is the average rate of change of f(x) = −2x + 1 from x = −5 to x = 1?

Answers

by calculating the slope, the average rate of change is -2
-1-11
---------
1--5

Answer:-2

Step-by-step explanation:

Name all sets of numbers to which each real number belongs

Answers

heres a chart hope this helps

Final answer:

A real number can belong to several sets of numbers, including the integers, rationals, irrationals, and reals. Integers are the set of whole numbers and their negatives, rationals can be expressed as a fraction of two integers, irrationals cannot be expressed as a fraction, and reals represent all possible numbers on the number line.

Explanation:

A real number can belong to several sets of numbers, including the integers, rationals, irrationals, and reals.

Integers are the set of whole numbers and their negatives, including zero. They don't include fractions or decimals.

Rationals are the set of numbers that can be expressed as a fraction of two integers, like 3/4 or -5/2.

Irrationals are the set of numbers that cannot be expressed as a fraction, like √2 or π.

Reals represent all possible numbers on the number line, including integers, rationals, and irrationals.

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what is 4 1/2 divided by 3

Answers

You divide 4.5 by 3. The answer is 1.5.

peter walks 40 meters in 1 minute what is his walking rate in meters per second

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Incorrect, I apologize.

What does −2/3(12c−9)+14c simplify to?

Answers

Answer:

The simplified form of the provided expression is [tex]6c+6[/tex] or [tex]6(c+1)[/tex]

Step-by-step explanation:

Consider the provided expression.

[tex]\frac{-2}{3}(12c-9)+14c[/tex]

Use the distributive property:

[tex]a(b+c)=ab+ac[/tex]

By using the above property we can simplify it as shown:

[tex]\frac{-2}{3}\times 12c-\frac{-2}{3}\times 9+14c[/tex]

[tex]-2\times 4c+2\times 3+14c[/tex]

[tex]-8c+6+14c[/tex]

Add or subtract the like terms.

[tex]6c+6[/tex] or [tex]6(c+1)[/tex]

Thus, the simplified form of the provided expression is [tex]6c+6[/tex] or [tex]6(c+1)[/tex]

The simplest form of expression by applying distributive property would be, 6 (c + 1)

Given that,

The expression is,

[tex]\dfrac{- 2}{3} (12c - 9) + 14c[/tex]

Now, used the concept of distributive property to simplify the expression,

[tex]\dfrac{- 2}{3} (12c - 9) + 14c[/tex]

Apply distributive property,

[tex][\dfrac{- 2}{3} \times 12c - (\dfrac{- 2}{3} )\times 9] + 14c[/tex]

[tex][- 2 \times 4c + 2 \times 3] + 14c[/tex]

[tex][- 8c + 6] + 14c[/tex]

Combine like terms,

[tex]- 8c + 14c + 6[/tex]

[tex]6c + 6[/tex]

Take 6 as a common term,

[tex]6 (c + 1)[/tex]

So, the solution of expression 6 (c + 1).

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The number of Adult tickets is the same as the number of Child (age 5-12) tickets. A total of 38 tickets was purchased. What is the total cost of the tickets? Explain.

Data: Adult Tickets $23
Child Tickets $17
Under 5 $8

Answers

A+C = 38
A=C=19
A*19 +C*17 = cost
19*19+19*17=684

Subtract 9 from z. 9-Z, Or Z-9

Answers

It would be Z-9 since you are subtracting 9 from Z

whats the awnser is it 600

Answers

the answer will be C 520

3600/300 = 12

4800/400 = 12

the common ratio is 12 so divide pounds of milk by 12 to get pounds pf ice cream

6000 / 12 = 500

Answer is B

A disc jockey must allow time for 24 minutes of commercials every hour, along with 4 minutes for news, 3 minutes for weather, and 2 minutes for public-service announcements. If each record lasts and average of 3 minutes, how many records per hour can the DJ play?

Answers

about 11 records per hour

A water tank holds 24000 gallons. How many hours will it take for 2/3 of the water to be used if the water is used at an average rate of 650 gallons a day?

Answers

First, determine what 2/3 of 24000 gallons is. That's 18000 gallons.

Next, divide this 18000 gallon amount by 650 gallons/da:

18000 gal
----------------- = 27.69 days, or about 28 days.
650 gal/day

24000 Gallons / 650(gallons per day) =36.92 days to fill it fully. Now take 36.92 and multiply by (2/3)=24.61 days. (.61 days = 14 Hours and 36 minutes)

The complex number z = –1 + 3i can be expressed in trigonometric form as:

Answers

[tex]\bf z=\stackrel{a}{-1}\stackrel{b}{+3}i\qquad \begin{cases} r=\sqrt{a^2+b^2}\\ \theta =tan^{-1}\left( \frac{b}{a} \right) \end{cases}\qquad \qquad z=r[cos(\theta )i~sin(\theta )]\\\\ -------------------------------\\\\ r=\sqrt{(-1)^2+3^2}\implies r=\sqrt{10} \\\\\\ \theta =tan^{-1}\left( \frac{3}{-1} \right)\implies \theta \approx -71.57\implies \theta \approx\stackrel{360-71.57}{288.43^o}\\\\ -------------------------------\\\\ z=\sqrt{10}\left[ cos(288.43^o)+i~sin(288.43^o) \right][/tex]

now, the calculation in the choices, show 289.5°, which I take it is due some early rounding up.

A hollow ball is made of rubber that is 1 centimeter thick. The ball has a radius of 5 centimeters at the outside surface.

What is the approximate volume of rubber used to make the ball?

Answers

Given that the ball has a thickness of 1 cm and the radius at the outside is 5 cm, thus the radius from inside is 5 - 1 = 4cm.

The approximate volume of rubber used to make the ball is given by the volume of the ball at the outside surface minus the volume of the ball at the inside surface.

i.e.

[tex]Volume\ of\ rubber= \frac{4}{3} \pi\left(5^3-4^3\right) \\ \\ = \frac{4}{3} \pi(61)= \frac{244}{3} \pi\approx255.5\ cm^3[/tex]

Answer: I got the same answer. It's 255.4 cm3

Step-by-step explanation:

It is estimated that there are 10^20 grains of sand on a beach in Florida in April. The beach is heavily eroded by tourists over the peak summer holiday season. Approximately one hundredth of the beach is removed as a result of this erosion. How many grains of sand are removed from the beach?

Answers

[tex]\bf \textit{how much is }\frac{1}{100}\quad of \quad 10^{20}?\implies \stackrel{\textit{one hundredth}}{\cfrac{1}{100}}\cdot 10^{20}\implies \cfrac{1}{10^2}\cdot 10^{20} \\\\\\ 10^{-2}\cdot 10^{20}\implies 10^{-2+20}\implies 10^{18} \\\\\\ 1,000,000,000,000,000,000~grains[/tex]

Answer:

Step-by-step explanation:

Which equation can be used to find the number of wolves in the state on January 1? A zoologist is recording the loss of wolves in her state. She notes the number of wolves, w, in the state on January 1. One year later, there were 84 wolves in the state, which is 23 fewer wolves than were in the state a year earlier. What is the number of wolves in the state on January 1? w−84=−23 w−23=84 23−w=84 w + 23 = 84

Answers

There were 23 fewer wolves, and there were 84 left after one year

w - 23 = 84

is your answer

because there were 107 wolves the previous year

hope this helps

Answer: w - 23 = 84

Step-by-step explanation:

Mr.Chaves spent $199.99 for a new smart phone $39.99 on a carrying case, and $59.99 on accesiories. The expression l-199.99l+l39.99l+l59.99l represents the total amount that Mr.Chaves spent. How much did he spend all together.

First answer will get brainiliest

Answers

just add 199.99 + 39.99 + 59.99 because an absolute value always equals a positive even if there is a negative like [ - 199.99]

1/4 + -2/3 (SIMPLIFY)

Answers

Answer:

[tex]\large\boxed{\dfrac{1}{4}+-\dfrac{2}{3}=-\dfrac{5}{12}}[/tex]

Step-by-step explanation:

[tex]\dfrac{1}{4}+\left(-\dfrac{2}{3}\right)=\dfrac{1}{4}-\dfrac{2}{3}\\\\\text{You must find the common denominator.}\\\\\text{List of multiples of 3:}\ 0,\ 3,\ 6,\ 9,\ \boxed{12},\ 15,\ ...\\\text{List of multiples of 4:}\ 0,\ 4,\ 8,\ \boxed{12},\ 16,\ ...\\\\\text{The common denominator is}\ \boxeed{12}.\\\\3\cdot4=12\\\\\dfrac{1}{4}=\dfrac{1\cdot3}{4\cdot3}=\dfrac{3}{12}\\\\\dfrac{2}{3}=\dfrac{2\cdot4}{3\cdot4}=\dfrac{8}{12}\\\\\\\dfrac{1}{4}-\dfrac{2}{3}=\dfrac{3}{12}-\dfrac{8}{12}=\dfrac{3-8}{12}=-\dfrac{5}{12}[/tex]

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