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Andreyy89
3 years ago
8

Would you rather have two 20% discounts or a 40% discount?

Mathematics
2 answers:
MissTica3 years ago
7 0

Answer:

one 40% discount

Step-by-step explanation:

lets use 100$ total for an example.

Say we have 40% of 100 so the total would be 60$ but it we have 20% and then another 20% off that we would have a final total of 64$\

Prove: 100*.4=40 100-40=60

100*.2=20 100-20=80, 80*.2=16 80-16= 64$

svp [43]3 years ago
6 0
A 40% discount. For example, taking 40% or .4 off 100 is 40. So for an item that costs 100$ you save 40$ = a 60$ item. If you were to do 2, 20% discounts it would be 100 x 20%, or .2, = 20, so an 80$ item. Then 20% of that would be 16. 80-16=64. 60 is less than 64 meaning a greater discount, like 40% off would be cheaper, then two discounts half if its size, like 2 20% discounts. If need more help then please do message.
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The price for 3 pounds of apples is $3.99. What is the unit rate?
Sholpan [36]

Answer:

the unit rate is 1.33$ per pound of apples

Step-by-step explanation:

you can rewrite the word problem as

3x = 3.99.

now just divide both sides by 3.

3x / 3 = 3.99/3

x = 1.33

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3 years ago
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Nikolay [14]
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Step-by-step explanation
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3 years ago
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How do you do fraction ,like 20 on top line then 30 on bottom ,I was bad art math sorry please explaine to my daughter so she ca
telo118 [61]
Alright, so since I don't have an example question, I will make one up. 

there are 8 coins in total. there are 6 dimes. What is the fraction of dimes to coins. 

you would put the amount of dimes on the top and the total on the bottom.

Answer: 6/8 which can be simplified to 3/4

Or another Example:

There are 12 pieces in the pizza. Billy took 4. what is the fraction of the slices left.

it would be 4-12= 8

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Hope that helped.
8 0
3 years ago
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A farmer has 144 feet of fencing to use to create a rectangular enclosure for his pigs. He decides to use the wall of his barn a
andreyandreev [35.5K]

Answer:

The farmer should make the enclosure 36 feet wide to have the maximum area for his pigs.

Step-by-step explanation:

The question tests the applications of differential calculus. We are informed that the farmer will use the wall of his barn as one side of the enclosure implying that the 144 feet of fencing will only be used to form the three remaining sides of the rectangular enclosure.

If we let x denote the width of this rectangular enclosure to be formed, then its length will be 144-2x since we shall be having two sides each measuring x and the total length of the fencing is 144. 2x will be used on the width leaving 144-2x for the length since one side of the length is formed by the wall.

If we let A denote the area of the rectangular enclosure, then;

A = x(144 - 2x)

since the area of a rectangle is simply the product of the length and the width.   We open the brackets;

A = 144x - 2x^2

Clearly, the Area is a function of the width that is A is the dependent variable while x is the independent one.

At the maximum area, the slope of the tangent to the curve 144x - 2x^2 is 0. Therefore, we differentiate the given function of x with respect to x then set the resulting expression to 0 to determine x that will maximize A;

dA/dx = 144 - 4x

We set this expression to 0 and solve for x;

144 - 4x = 0

144 = 4x

x = 36

Therefore, the farmer should make the enclosure 36 feet wide to have the maximum area for his pigs.

5 0
3 years ago
If a person has the values for an object's density and volume, what value can be calculated? the object's size the object's mass
irina [24]

Answer:

The object's mass.

Explanation:

The formula d=m/v.

d --> density

m--> mass

v --> volume

With density and volume given, you can calculate the mass of the object.

8 0
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