A collector bought 47 coins at auction, some bronze and some silver. The bronze coins cost him $ 14 each and the silver coins, $ 18 each. If in total he spent $ 750, how many bronze coins did he buy and how many silver?

(with the steps)

please help me, it's for an exam

Answers

Answer 1
24 bronze coins and 23 silver coins

B= bronze coins S = silver coins
$14xB + $18 x S =$750
B + S = 47 total coins
Get in terms of S=47-B by subtracting B from each side, then replace the S in the first equation with this so that:
14xB+18x(47-B)=750
14B+846-18B=750
Subtract the 846 and combine the abs
-4B=-96 then divide the -4 on both sides
To get B=24 then 47-24=23=S

Related Questions

What is the greatest common monomial factor of 6m3x4 + 30m5y2 + 45m3x6y2? 6m5x6y2 3m3 6m3 3m5x6y2

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I’d say 6 but I could be wrong

Answer:

3m³

Step-by-step explanation:

The leading coefficiets, 6, 30 and 45 are all divisible by 3

m is the only variable present in all three terms.

m³ is a factor of m⁵

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Answer:

x<14

Step-by-step explanation:

Simplify: -5(3c-9) – 9c – 7c2 +5
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Answer:

ANSWER: [tex]-7c^{2} -24c+50[/tex]

Step-by-step explanation:

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Answer: 62.4

Step-by-step explanation:

6 times 5.20 times 1/2 = 15.6

15.6 times 4 = 62.4

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i think It is 21! Let me know if i is wrong.

The areas of sectors ACB and DEF are equal. what expression gives the values of x?show your work

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Answer:

I think this is right thanks :)

This sum of -7 times A number and eight times the sum of the number and one is the same as the number -7

Answers

Answer:

-7x + 8(x + 1) = -7

Step-by-step explanation:

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A certain rectangular prism has a height of 6 m, a length of 5 m, and a width of 4 m. Give the dimensions of a SECOND rectangular prism that will have the same surface area of the first one.




Pls dont look up the question and copy and paste the same answer either
if you do i will report you
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Answers

Answer:

The surface area is 148

Step-by-step explanation:

Soooo i had to look up how to do it cause i completely forgot how. But once i did, i worked it out.

The formula i got was: A= 2(wl+hl+hw)

W= width                 h= height           l= length

From there i just replaced the corresponding numbers for the letters that represent them. (think of that as like you see someone that you think represents you and you try to replace them, with you. Same here just w/ numbers and letters)

A= 2 [ (4x5) + (6x5) + (6x4) ]

from here you do order of operations starting with what's inside the parentheses. Then you work your way out.

A= 2 [20+ 30+ 24]

A= 2 [74]

Anytime a number is next to parentheses or brackets (which are these: [ ] ) you multiply what is outside them by what's inside them. (for this think about kids. When you seperate them, they try to make more noise. When you seperate numbers, they multiply)

Final answer is

A= 148

if this is wrong i am so, so, so sorry. I hope this helps, and i hope you have an amazing day!! Be tiger fierce! :)

A length of 5.3, a width of 7, and a height of 3.  This would give you the same surface area of 148 as the 1st one. Good luck with your studies <3

Bonjour mon exercice c'est 36%de 25km. C'est un exercice de maths à faire pouvez vous m'expliquer svp merci

Answers

Answer:

9km

Step-by-step explanation:

La question précise que:

36% de 25km

La signification de "OF" mathématiquement = x (multiplication)

Par conséquent:

36% de 25km

= 36/100 × 25 km

= 9 km

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Answers

Answer:

b) 256 inches

Step-by-step explanation:

8x5x2 = 80   (top & bottom)

8x5x2 = 80    (front & back)

8x8x2 = 128    (gross area of 2 sides)

4x4x2 =32      (delete this for side cutouts) Guessing the cutoff dimension on

                                                                       left side is 4m inch.

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Answers

Answer/Step-by-step explanation:

What do you mean by property?

I will guess for now, but if it is not right I will update it.

It would be the associative property since you are flipping the equation around.

Hope this helps :)

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Answers

Answer:

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Step-by-step explanation:

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Answer:

Yes it is linear

Step-by-step explanation:

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Answer:

D.

Step-by-step explanation:

Took the test

PLease help
WILL GIVE BRAINLIEST

Answers

Answer:

41.472 m²

8.449m²

Step-by-step explanation:

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the square scale factor is 1.44^2 = 2.0736

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2.0737x 20 = 41.472 m²

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Answers

Answer:

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Step-by-step explanation:

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Answers

Answer:

1kg stone

Step-by-step explanation:

Answer:

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Answers

Answer:

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Answer:

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Step-by-step explanation:

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Answers

Answer:

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Step-by-step explanation:

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The fraction (1/15)⁷ can be written as 15⁻⁷ after using the properties of the integer exponent.

What is an integer exponent?

In mathematics, integer exponents are exponents that should be integers. It may be a positive or negative number. In this situation, the positive integer exponents determine the number of times the base number should be multiplied by itself.

It is given that:

The number expression is:

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As we know, from the definition of the integer exponent;  integer exponents are exponents that should be integers. It may be a positive or negative number.

After using the properties of the integer exponent:

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brainly.com/question/4533599

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Answers

Answer:

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Step-by-step explanation:

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Answers

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Step-by-step explanation:

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Your answer is correct.

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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Answers

Answer:

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Step-by-step explanation:

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Please mark my answer as the brainliest

Step-by-step explanation:

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Answers

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