All categories

3 years ago

What is a real world problem for 2(n+20)=110

Mathematics

1 answer:

sashaice [31]3 years ago

6 0

John

You went to the store to buy a gift for your friend. Jeans are 20 dollars (what a deal) so you buy one for yourself and your friend. Then you see this really cute top and you want to match with your friend, so you get two of those too.

The total on the bill is $110.

While walking to your car, you lose the receipt.

When you give your friend the gift, she is excited. But says you spent too much money on her! She wants to pay you back for the shirt, but you can't remember how much it cost

You might be interested in

today's local newspaper lists 20 stocks of local interest. of those stocks ten increased five decreased and five remained unchan

coldgirl [10]

Answer:

P(x=2) = 0.2368

Step-by-step explanation:

given data

stocks of local interest N = 20

stocks increased K = 10

stocks decreased = 5

remained unchanged = 5

solution

we take here no of stock that are increased randomly n = 2

so here Hypergeometric random variable can take integer value

{max(0, n+k - N ), min(n,K) } = {0,2}

so here

P(x=2)

P(x=k) = $\frac{(^K_k)\times (^{N-K}_{n-k}) }{(^N_n)}$ .......................1

P(x=2 ) = $\frac{(^{10}_2)\times (^{20-10}_{2-2}) }{(^{20}_2)}$

solve it we get

P(x=2 ) = 0.236842

now we use excel function as

HYPGEOM.DIST (k,n,N.cumulative) .....................2

so it will be

HYPGEOM.DIST (2,2,10,,false)

we get

HYPGEOM.DIST (2,2,10,,false) = 0.236842

P(x=2) = 0.2368

4 0

3 years ago

2. The height of one square pyramid is 24 m. A similar pyramid has a height of 8 m. The volume of the larger pyramid is 648 m3.

Dmitrij [34]

Larger PyramidHeight 24 Volume 648

Pyramid Volume = (Area of the Base * Height) ÷ 3648 = Base Area * 24 / 3Base Area = 648 * 3 / 24Base Area = 648 / 8Base Area = 81Base Length = 9
a) The Scale Factor between the Small & Large PyramidLength - 3LATERAL Area - 9Volume - 27

Slant Height^2 = 4.5^2 + 24^2Slant Height^2 = 596.25 Slant Height^2 = 24.4182308941 
b)
Large Pyramid Area = (½ * Perimeter of Base * Slant Height) + Base AreaLarge Pyramid Area = (.5 * 36 * 24.4182308941) + 81
Large Pyramid Area = 439.5281560938 + 81
Large Pyramid TOTAL Area = 520.5281560938 Large Pyramid LATERAL Area = 439.5281560938 

**********************************************************************************c)
Smaller PyramidHeight 8Surface Area = 124
This pyramid has dimensions that are one third of the larger pyramid.Therefore, it has a base length of 3.Base Area = 9.
Its base perimeter would be 12.
Small Pyramid Volume = (Area of the Base * Height) ÷ 3Small Pyramid Volume = ( 9 * 8 ) / 3Small Pyramid Volume = 72 / 3
c) Small Pyramid Volume =24 cubic meters

d) Ratio of larger pyramid volume to smaller pyramid volume648 / 24 = 27The reason? Volume is a 3 dimensional quantity. The Larger pyramid is 3 times larger in terms of the base measurement.9 meters vs 3 meters - a factor of 3When we compare volumes, we have to cube this factor.3^3 = 27

Source : http://www.1728.org/volpyrmd.htm

3 0

3 years ago

A total of 200 video game players take a survey on their favorite game. Unknown Kingdom

zepelin [54]

Answer:

Could you explain it another way?

Step-by-step explanation:

4 0

3 years ago

Which of the following statements uses the multiplicative identity?

algol [13]

9514 1404 393

Answer:

(-8)(1) = -8

Step-by-step explanation:

The multiplicative identity element is 1. Multiplying by 1 does not change the value. This is illustrated by ...

(-8)(1) = -8

7 0

3 years ago

You have $1 and $5 bills in your savings envelope with a total value of $26. there are more $1 bills than $5. you would like to

marta [7]

I’m not very good at math, but maybe try adding all of them together

3 0

3 years ago