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4 years ago

Plz help whith homework

Mathematics

1 answer:

grin007 [14]4 years ago

6 0

You have to turn the denominators the same then whatever you do to the top you do to the bottom the just subtract

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The quinceañera (the young woman being celebrated)

MA_775_DIABLO [31]

Answer:

2 minutes and 5 seconds

Step-by-step explanation:

60+20+15+15+15= 125 Seconds ( 2 minutes and 5 seconds )

I added three fifteens as I don't know the number of chambelanes.

Hope it helps!

6 0

3 years ago

Find the perimeter of diameter 3.5 cm

sergiy2304 [10]

Answer: I am assuming it’s of a circle? So the answer would be rounded to 11.

Step-by-step explanation:

3 0

3 years ago

A rate of deposit of dust from unpolluted air is 10.0 tons per square mile per month (30 days). what is this dust fall, in milli

valina [46]

The rate of dust deposition is
$Rate= \frac{10 \,tons}{mi^{2}-30\,days} = \frac{1}{3} \, \frac{tons}{mi^{2}-day}$

Note that
1 ton = 9.07185 x 10⁵ g = 9.07185 x 10⁸ mg
1 mi = 1609.34 m = 1.60934 x 10³ m
1 day = 24 h

Therefore
$Rate=( \frac{1}{3}\, \frac{tons}{mi^{2}-day} )*( \frac{1}{24} \, \frac{day}{h} )*( \frac{1}{1.60934\times10^{3}}\, \frac{mi}{m} )^{2}*(9.07185\times10^{8}\, \frac{mg}{ton})\\= 4.865\, \frac{mg}{m^{2}-h}$

Answer: $4.865\, \frac{mg}{m^{2}-h}$

3 0

3 years ago

Factor completely 2x^2 − 2x − 40.

zubka84 [21]

Step-by-step explanation:

Hey there!

Given;

$= 2 {x}^{2} - 2x - 40$

Solve it by using mid-term factorization.

$= 2 {x}^{2} - 2x - 40$

$= 2 {x}^{2} - (10 - 8)x - 40$

$= 2 {x}^{2} - 10x + 8x - 40$

Take common and simplify them to get answer.

$2x(x - 5) + 8(x - 5)$

$= (2x + 8)(x - 5)$

$= 2(x + 4)(x - 5)$

Therefore the answer is option D.

Hope it helps..

3 0

4 years ago

Can u help me guys this is hard

Nadusha1986 [10]

25% as a fraction is 1/4 and as a decimal it’s 0.25
1/2 as a percentage is 25% and as a decimal it’s 0.25
6.66% as a fraction is 333/50 and as a percentage it’s 666%

6 0

3 years ago