All categories

2 years ago

Help me pleaseeeeeeeeee, much appreciated!!!!!!!!!!

Mathematics

1 answer:

muminat2 years ago

4 0

Step-by-step explanation:

that is quite a lot of failing TVs.

if 5% are failing, this means you have a "chance" of 5/100 = 1/20 that your TV is among them.

that means the expected costs for replacement in the next 3 years are

1750 × 1/20 = 175/2 = $87.50

minus the $200 replacement plan the expected value is of course negative :

87.5 - 200 = -$112.50

and if your TV breaks after more than 3 years, the expected value is actually -1750 - 200 = -$1,950

which is the principle of replacement plans, and why I never buy one.

but sure, for the 5% with broken TVs this pays off big time (it is kind of a lottery).

You might be interested in

What are the common multiples of 16, and 18?

valentina_108 [34]

It is multiplied by the same number of 2 and 1

4 0

3 years ago

Answer it pls :)

Alinara [238K]

Answer:

first one because the second one is solvable through graphing

Step-by-step explanation: y = mx +b could be anything

5 0

3 years ago

There are two peice pf gold and silver alloy. The ratio between the gold and silver in the first piece is 2:3, in the second pei

STALIN [3.7K]

Answer:

1 grams of one of the alloy; and
7 grams of the other corresponding alloy.

Step-by-step explanation:

The ratio between the gold and silver in the first piece = 2:3

The ratio between the gold and silver in the second piece =3:7

The ratio in the mixture = 5:11

We want to have 8 gram of the new mixture.

Let the gram of alloy taken from the first piece=x

Therefore: gram of alloy would be taken from the second piece=(8-x)

This gives:

$\dfrac{2}{5}x+ \dfrac{3}{10}(8-x)=\dfrac{5}{16}*8$

We simplify the equation above for the value of x.

$\dfrac{2x}{5}+ \dfrac{3(8-x)}{10}=\dfrac{5}{2} \\\dfrac{4x+24-3x}{10}=\dfrac{5}{2}\\\dfrac{x+24}{10}=\dfrac{5}{2}\\2x+48=50\\2x=50-48\\2x=2\\x=1$

Therefore to create 8 gram of gold and silver alloy with gold-silver ratio 5:11, we take 1 grams of one of the alloy and 7 grams of the other alloy.

3 0

3 years ago

How many times larger than 0.005 is 0.625

aalyn [17]

Answer:

Step-by-step explanation:

0.005 * x = 0.625 Divide both sides by 0.005

0.005x/0.005 = 0.625/0.005 Do the division

x = 125

So what that means is 0.625 is 125 times larger than 0.005

6 0

4 years ago

-(-81/-9) is this positive or negative?

Delvig [45]

Negative. There are - < these signs before the numbers, so that means they’re negative

8 0

3 years ago