MATHEMATICS MIDDLE SCHOOL

If 270 people chose math as their favorite subject, how many people were surveyed?math = 45%
science = 6%
english = 6%
reading = 2%
other = 41%

a. 800
b. 500
c. 600
d. 122

Answers

Answer 1
Answer: 80000000000000000000000

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Why are tenths, fifths, and fourths easy to convert to percent's?
Im stuck on question 43
Harry is at a Pizza Hut and he sees that 5 pizzas cost $300.He needs 15 pizzas.How much does 15 pizzas cost.
Answer: 80% of ____ is 16
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The number of campers who sign up for archery each week is listed in the table. If the relationship is proportional, how many campers will sign up for archery in Week 3?Archery Sign Up Total Campers
Week 1 36 120
Week 2 45 150
Week 3 ? 130

A. 54
B. 40
C. 41
D. 39

Answers

Answer:

\boxed{39}

Step-by-step explanation:

\begin{array}{rcc}& \textbf{Archery Sign Up} & \textbf{Total Campers}\n\textbf{Week 1} & 36 & 120\n\textbf{Week 2} & 45 & 150\n\textbf{Week 3} & ? & 130\n\end{array}

Let x = Total campers

and y = Archery sign up

In a direct proportionality,

y = kx

1. Calculate the value of k

Substitute a pair of values for x and y

150 = k × 45

Divide each side by 45

k = 150/45 = 10/3

2. Calculate the value of x in Week 3

\begin{array}{rcl}130& = & (10)/(3)x\n\n390 & = & 10x\nx & = & \mathbf{39}\n\end{array}

\boxed{\textbf{39 campers}} \text{ will sign up for archery in Week 3}

The diagram is a graph of your proportionality. It shows that y = 130 when x = 39.
A. 54 is your answer

250% increase of 28,000?

Answers

250% can be converted into a fraction 250/100 or into a decimal 2.50.
 so  250% of 28,000 is 2.50 times 28,000 which is 70,000.
28,000 is increased by 70,000 to 98,000 
In math "of" means multiply (x).  So 250% increase of 28,000 means

250% x 28,000 + 28,000 (we add 28000 because it's an increase so we have to add it to the original amount).

250% x 28000 =
2.5 x 28000 = 70,000

Now add it back to the original 28,000

70,000 + 28,000 = 98,000

Trey has 180 coins in his piggy bank.of these coins,1/12 of the coins are dimes,2/9 are quarters,1/6 are nickels,and the rest are pennies.how many pennies does trey have in his piggy bank?

Answers

180 coins total.

You need to find out how many pennies there are out of the 180 coins in Trey's piggy bank. So, you need to first find the total number of the other coins in the piggy bank. To do so, multiply each fraction by 180.

Dimes:
1/12 * 180 = 15 dimes

Quarters:
2/9 * 180 = 40 quarters

Nickels:
1/6 * 180 = 30 nickels

Now, you can add up the dimes, quarters, and nickels and subtract that from the total 180 coins to find out how many pennies Trey has in his piggy bank.

180-(15+40+30)=95
180-85=95
total=pennies+dimes+quarter+nickles
total-dimes-quarters-nickles=pennies

find how many of each
1/12 of all are dimes
1/12 times 180=15 dimes

2/9 of all are quarters
2/9 times 180=40 quarters

1/6 are of all are nickles
1/6 times 180=30 nickles

toatl=180
180-15-40-30=pennies
95=pennies



he has 95 pennies
(anohter harder way is to add alll fractions and find the fraction of pennies)

1/12+2/9+1/6=3/36+8/36+6/36=17/36
17/36+pennies=total=36/36
pennies=19/36 of total
pennies=19/36 times 180
pennies=95




95 pennies

How many 2/3 pieces can you cut from a 10 foot long board

Answers

I told you in my answer that I was writing that you have to remember that in math any whole number converted to a fraction is over 1.  So make the 10 a 10/1. 

10/1 divided by 2/3 copy change flip.

10/1 x 3/2  multiple across 30/2  divide that answer is 15.  You can cut 15 boards that are 2/3 in length from a 10 foot long board.

A backpack that normally sells for $39 is on sale for 33% off. Find the amount of the discount and the sale price.

Answers

1. 33% = 0.33 
$39 x 0.33 = $12.87 
$39 - $12.87 = $26.13 

Discount: $12.87 
Sale price: $26.13 
First find 10%
10% of $39 = $3.90
so...
30% of $39 = $11.70
This is because 30% is 10% multiplied by 3. So you just have to multiply 3.90 by 3.
Then you would work out 1%
1% of $39 = $0.39
so...
3% of $39 = $1.17
This follows the same principle as before.
Now you have to add them together to get the discount price.
11.70 + 1.17 = $12.87

To get the price after the discount, simply take the discount price away from the usual price:
39 - 12.87 = $26.13

Therefore the two answers to your questions are..
$12.87
and..
$26.13
Hope this helped :)

Describe the rule of this function, and find the missing number8-->15
6-->11
10-->19
4-->?

Answers

-2,+4. If you put them in order, they will be simpler
4->?
6->11
8->15
10->19
so it is 4-->7
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