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Verizon [17]
3 years ago
8

The price of an item yesterday was $140. Today, the price fell to $63. Find the percentage decrease.

Mathematics
2 answers:
tankabanditka [31]3 years ago
5 0

Answer: 55% decrease

Step-by-step explanation:

% decrease is calculated by = [ (New Value - Old Value) / Old Value × 100

63 - 140 = -77

-77/140 = -0.55

- 0.55 x 100

= -55%

Anna35 [415]3 years ago
4 0

Answer:

55% decrease

Step-by-step explanation:

To find the percent decrease

Take the original price and subtract the new price

140-63 =77

Divide by the original price

77/140

.55

Multiply by 100 to get the percent

.55*100 = 55%

55% decrease since the price got lower

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How can you determine if you need to use a combination or permutation to count the number of outcomes? Which will usually have m
Nadya [2.5K]

Answer with Step-by-step explanation:

Permutation : It is an arrangement of r elements out of n elements.

Combination : it is a selection of r element out of n elements .

Suppose we have a set

S={1,2,3}

If two elements are taken at a time then

Using permutation formula

Total number of outcomes=3P_2

Total number of outcomes=\frac{3!}{(3-2)!}

Total number of outcomes=3!=3\times 2\times1=6

Using combination formula

\binom{n}{r}=\frac{n!}{r!(n-r)!}

Total number of outcomes=\binom{3}{2}=\frac{3!}{2!1!}

Total number of outcomes=\frac{3\times2!}{2!}

Hence, total number of outcomes=3

Total number of outcomes determined by permutation have more outcomes.

Because permutation is an arrangement of elements  therefore, it consider order of arrangement of element   but combination is a selection of elements it does no consider order of elements

Arrangements of two elements out of 3 elements

{1,2},{2,3},{2,1},{3,2},{1,3},{3,1}

By using combination if two elements taken at a time then combination

{1,2},{2,3},{1,3}

4 0
3 years ago
Whole-wheat bread costs $2.06/lb. How much would 3.8 lb of whole-wheat bread cost?
Xelga [282]
Whole-wheat bread = $2.06/lb

We need the cost of 3.8 lbs of whole-wheat bread.

So, we simply need to multiply the cost with the amount needed.

(cost per pound) × (amount of bread)

($2.06) × (3.8)

Simplify.

$7.828

Round to the nearest tenths.

$7.83

So, 3.8 pounds of whole wheat bread costs $7.83

~Hope I helped!~


7 0
3 years ago
Read 2 more answers
Help ASAP PLEASE AND THANK YOU
Rom4ik [11]
Correct Choice is B.

•Apex Approved•
6 0
3 years ago
Please Help ME : The graph models the relationship between the ticket price for a concert and the expected profits.
yuradex [85]

Answer:

18,000 is the maximum and indicates highest profit

Step-by-step explanation:

sorry for leaving that second part out

7 0
2 years ago
Find the height of a triangle with area = 110 ft squared and base = 10ft
maria [59]
Well to find the are of a triangle is like finding the are of a rectangle but in half so multiply 110 by 2 to get the original answer before it was divided by 2:

110×2=220

now we need to find out how many 10 are in 220:

220÷10=22

so the height of the triangle would be 22 ft

hope this helped

4 0
3 years ago
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