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3 years ago

An 80% increase followed by a 40% decrease

Mathematics

1 answer:

scZoUnD [109]3 years ago

4 0

You start with 100%, add 80% for the increase and you get 180%, take away 40% for the decrease and you get 140%

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Find the average.

fomenos

Answer:

my answer is b) 0

Step-by-step explanation:

coz

-3+4+2+1+-4+-1+3+-2=0

divided by 8 is 0

4 0

3 years ago

Read 2 more answers

) A random sample of n measurements was selected from a population with unknown mean μ and standard deviation σ. Calculate a 95%

UNO [17]

Answer:

ask MisterBrainly for help

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2 years ago

One year, the population of a city was 80,000. Several years later it was 66,400. Find

Shalnov [3]

Answer:

The population decrease by 17%.

Step-by-step explanation:

This is because 66,400 is 83% of 80,000.

100%-83%= 17%

Therefore, the percentage of the population that decreased was 17%

7 0

2 years ago

If the cost price of 21 article is equalto the selling price of 18 articles. Find profit precent

d1i1m1o1n [39]

Answer:

The selling price of 21 articles is equal to the cost price of 18 articles. Find the loss percent. Answer: answer is 100/7 %

3 0

2 years ago

(1/27)^x-6=27 Could I please have a step by step as well? Much appreciated!

Andrei [34K]

Answer:

$x = 7$

Step-by-step explanation:

1) Use Division Distributive Property: (x/y)^a = x^a/y^a.

$\frac{1}{ {27}^{x - 8} } = 27$

2) Multiply both sides by 27^x - 8.

$1 = {27} \times 27^{1 + x - 8}$

3) Use the product rule: x^a x^b = x^a+b.

$1 = {27}^{1 + x - 8}$

4) Simplify 1 + x - 8 to x - 7.

$1 = {27}^{x - 7}$

5) Use Definition of Common Logarithm: b^a = x if and only if logb (x) = a.

$log_{27}1 = x - 7$

6) Use Change of Base Rule.

$\frac{ log_1 }{ log{27} } = x - 7$

7) Use rule of 1: log 1 = 0.

$\frac{0}{ log_{27}} = x - 7$

8) Simplify 0/log_27 to 0.

$0 = x - 7$

9) Add 7 to both sides.

$7 = x$

10) Switch sides.

$x = 7$

Therefor, the answer is x = 7.

5 0

3 years ago