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kakasveta [241]
3 years ago
11

You break you break your piggy bank which is filled with nickels and quarters. You have 32 coins and a total of 5.20. How many q

uarters and nickels do you have ?
Mathematics
1 answer:
Tatiana [17]3 years ago
4 0

Answer: 14 nickels and 18 quarters.

Step-by-step explanation:

Let x = Number of nickels , y = Number of quarters

As per given , we have

x+ y= 32            (i)

0.05x+0.25y= 5.20              (ii)

Multiply (ii) by 4 , we get

0.2x+y = 20.8          (iii)

Subtract (iii) from (i) , we get

0.8x = 11.2

\Rightarrow\ x=\dfrac{11.2}{0.8}\\\\\Rightarrow\ x = 14

Put value of x in (i) , we get

y =32-14 = 18

Hence, we have 14 nickels and 18 quarters.

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The answer A.the solution is (5,-2) definitely works because 5+-2=3 and 5--2=7 not sure if there's infinite number of solutions tho
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Seven years ago, kodi found a box of old baseball cards in the garage. since then, he has added a consistent number of cards to
Katena32 [7]
(3,52)(7,108)
slope = (108 - 52) / (7 - 3) = 56/4 = 14

y = mx + b
slope(m) = 14
(3,52)...x = 3 and y = 52
sub and find b, the y int (the original amount of cards)
52 = 3(14) + b
52 = 42 + b
52 - 42 = b
10 = b

so ur equation is y = 14x + 10....with x being the number of years and y being the total cards. <== ur equation is y = 14x + 10

He started with 10 cards....and has been adding 14 cards every year.

so after 10 years...
y = 14(10) + 10
y = 140 + 10
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3 years ago
Which equation is written in slope-intercept form?
dlinn [17]

Answer:

y=3x+2

Step-by-step explanation:

slope intercept form

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m=slope

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5 0
3 years ago
(02.05 MC) A dance school has 63 ballet dancers. If 42% of the total number of dancers in the school are ballet dancers, what is
Elena L [17]

Alright, lets get started.

Suppose total number of dancers in school = x

We have given in question, 42 % of total dancers are ballet dancers.

So, we could find number of ballet dancers by finding 42 % of total dancers.

Number of ballet dancers = x * 42 %

Number of ballet dancers = x * 42/100 = 0.42 x

As per given in question, there are 63 ballet dancers in school.

Which means 0.42 x = 63

Dividing 0.42 from both sides

0.42 x / 0.42 = 63 / 0.42

x = 150

Hence number of total dancers in school = 150 : Answer

Hope it will help :)

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Tshepo needs R5 000 urgently. He goes to the bank and borrows the money at an interest rate of 28% per annum, compounded monthly
12345 [234]

Answer:

<u>R8000</u>.

Step-by-step explanation:

First, let's calculate the amount they are going to have to pay the bank after 1 year. It is given by the following expression:

R5 000 * 1.28= R6400

Therefore, they have to pay R6400/12 monthly.

Now, in fifteen months the total amount to pay should be (R6400/12) * 15= <u>R8000</u>.

8 0
1 year ago
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