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adell [148]
3 years ago
11

Can u help me answer this I’m so stuck

Mathematics
1 answer:
Slav-nsk [51]3 years ago
6 0

Answer:

I learned a great formula for repeating decimals.

OK! Let's get started. For each decimal spot that is recurring, it is put over a 9, rather than a 10.

In your case, 0.142 would be 142 over 3 9s.

142/999 cannot be simplified.

Therefore, 142/999 is our answer.

Since the repentant is over only one digit, we have to solve another way.

We can represent it as "x"

10x = 5.66.... - x = 0.56.....=5.1

9x = 51/10

51/10/9 = 51/90 = 17/30 as our answer.

We can solve this next one the same way:

100x = 3.44444 - x  = 3.41

999x = 341/100

341/100/999 = 31/900 as our answer.

Now! 1.52 can be solved the same way.

In doing so, we achieve the answer 151/99 as our answer

This one can be done the same way as well. I'll give you the answer, but next time try to solve it for yourself!

179/495 is our answer.

Now, you asked for 0.004 as a fraction.

That is equivalent to 4/999 as our answer.

Note: This is because each 0 can be counted as a 9, increasing in order. (i.e., over 100 is over 99 over 1000 is over 999 over 10 9)

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Adam has $2.15 in nickels, dimes and quarters in his pocket. If the number of dimes is 4 less than the number of nickels, and 5
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Answer:

8 Dimes,12 Nickels, and 3 Quarters

Step-by-step explanation:

d= amount of dimes  n=amount of nickels  q=amount of quarters

You have to make formulas for the different variables. Since there are four more dimes than nickels so you have d+4=n. same thing with quarters but LESS so you would subtract d-5=q.

Then making the big picture;

Dimes have 10 cents Nickles have 5 cents, and Quarters have 25 cents. We do not know how many of each we have but we do know how much they are so when you add them together you would have to get the amount of money. That is  were the amount of each coin comes in so we have 10(d) for dimes 5(n) for nickles then 25(q) for quarters. We know the total of those is going to get 215 for the $2.15. This is how we get the big formula 10(d)+5(n)+25(q)=215.

Now we just plug things in 10(d)+5(d+4)+25(d-5)=215. Now we solve for D.

Distribute the 5 and 25   10d+5d+20+25d-125=215

Add common multiples   40d-105=215

Add 105 to both sides   40d=320

Divide 40 to both sides d=8

Now you have to figure out how many quarters and nickels you have just plug them into the other formulas;

n=d+4    n=8+4    n=12

q=d-5     q=8-5     q=3

You can ALWAYS check you answer by plug them into the "big picture"

10d+5n+25q=215   ~   10(8)+5(12)+25(3)=215  ~  80+60+75=215

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Answer: $18.52

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$326.79x.03=$9.80

$581.34x.015=$8.72

$9.80+$8.72=$18.52

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If you look at the red blue and purple dots you can see that they form a straight line. if you connected the green dot to the line it would make the line not straight, therefore the relationship is not proportional.

(6, 11) is your answer

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