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2 years ago

What is the percent of decrease from 3.2 to 1.2 plz help

Mathematics

2 answers:

Licemer1 [7]2 years ago

5 0

Answer:

62.5%

Step-by-step explanation:

(1.2 - 3.2) / 3.2 =

- 2 / 3.2 =

- 0.625 =

- 62.5

The minus (-) reflects the decrease.

Naddika [18.5K]2 years ago

5 0

Answer:

62.5%

Step-by-step explanation:

if 3.2 - 100%

1.2 - x

x= (1.2*100)/3.2

x = 37.5%

Decrease = 100-37.5 = 62.5%

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a collection of dimes and quarters is worth $19.85. There are 128 coins in all. How many of each type of coin are in the collect

PolarNik [594]

Number of dimes were 81 and number of quarters were 47

Solution:

Let "d" be the number of dimes

Let "q" be the number of quarters

We know that,

value of 1 dime = $ 0.10

value of 1 quarter = $ 0.25

Given that There are 128 coins in all

number of dimes + number of quarters = 128

d + q = 128 ------ eqn 1

Also given that collection of dimes and quarters is worth $19.85

number of dimes x value of 1 dime + number of quarters x value of 1 quarter = 19.85

$d \times 0.10 + q \times 0.25 = 19.85$

0.1d + 0.25q = 19.85 -------- eqn 2

Let us solve eqn 1 and eqn 2

From eqn 1,

d = 128 - q -------- eqn 3

Substitute eqn 3 in eqn 2

0.1(128 - q) + 0.25q = 19.85

12.8 - 0.1q + 0.25q = 19.85

12.8 + 0.15q = 19.85

0.15q = 7.05

Therefore from eqn 3,

d = 128 - q

d = 128 - 47

Thus number of dimes were 81 and number of quarters were 47

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3 years ago

The sum of two numbers must be 14 or greater. The product of the two numbers must be less than 40. Which system of inequalities

Anettt [7]

Answer:

Step-by-step explanation:

x+y≥14

xy<40

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2 years ago

Total revenue is 3,000 cost of goods 1,500 total selling expence is 500 what is profit

12345 [234]

Cost of goods = 1,500
Selling expense = 500

Total cost in selling = 1500 + 500 = 2000

Profit = Total Revenue - Total cost in selling = 3000 - 2000 = 1000

Profit = 1000

Hope this explains it.

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3 years ago

Read 2 more answers

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frez [133]

Answer:

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Step-by-step explanation:

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2 years ago

If a population consisted of 1000 people, a sample of the population could

Levart [38]

Answer: 100

Step-by-step explanation: 10%

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3 years ago