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dlinn [17]
3 years ago
12

Mary made 5 different sandwiches: turkey, roast beef, ham, bologna, and salami Mary wrapped the sandwiches and placed them into

a bag, but forgot to label them. If she picks out two sandwiches, what is the probability that she will get turkey and salami?
A 1/10
B 2/25
C 1/20
D 1/5
Mathematics
1 answer:
Diano4ka-milaya [45]3 years ago
8 0
1/5 because if there are only 5 sandwiches than the chance of getting any of the sandwiches is 1 out of the 5

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Can someone explain what geometric sequences are?
Fed [463]

Explanation:

A sequence is a list of numbers.

A <em>geometric</em> sequence is a list of numbers such that the ratio of each number to the one before it is the same. The common ratio can be any non-zero value.

<u>Examples</u>

  • 1, 2, 4, 8, ... common ratio is 2
  • 27, 9, 3, 1, ... common ratio is 1/3
  • 6, -24, 96, -384, ... common ratio is -4

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<u>General Term</u>

Terms of a sequence are numbered starting with 1. We sometimes use the symbol a(n) or an to refer to the n-th term. The general term of a geometric sequence, a(n), can be described by the formula ...

  a(n) = a(1)×r^(n-1) . . . . . n-th term of a geometric sequence

where a(1) is the first term, and r is the common ratio. The above example sequences have the formulas ...

  • a(n) = 2^(n -1)
  • a(n) = 27×(1/3)^(n -1)
  • a(n) = 6×(-4)^(n -1)

You can see that these formulas are exponential in nature.

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<u>Sum of Terms</u>

Another useful formula for geometric sequences is the formula for the sum of n terms.

  S(n) = a(1)×(r^n -1)/(r -1) . . . . . sum of n terms of a geometric sequence

When |r| < 1, the sum converges as n approaches infinity. The infinite sum is ...

  S = a(1)/(1-r)

8 0
3 years ago
15 1/4 acres of land are to be divided into lots of at least 2/3 acres each What is the maximum number of lots that can be creat
Sholpan [36]
Well, if you want the maximum number of splits, then you want to make
each individual split as small as possible. 
That's 2/3 acre.  How many will that give you ?

                  (15 and 1/4) divided by (2/3)

             =      (15.25)  /  (0.666...)  =  22.875 pieces .

The maximum number of 2/3-acre lots you can sell is 22 lots.

Then you have 58.3% of an acre of land left over that you can't sell
because it's less than 2/3 acre.  Sadly, that 58.3% of an acre is just
about the size of the lot that I've been living n for almost 30 years. 
You really know how to rub it in, dontcha !

5 0
3 years ago
Read 2 more answers
The graph of g(x)=(1/2)x is the graph of f(x)=2x reflected over the y-axis. Which graph represents g(x) please help!
topjm [15]
Please put more details in the question 
6 0
3 years ago
I will mark brainliest!
Evgen [1.6K]

Answer:

4 gallons.

Step-by-step explanation:

Reading the top point on the graph we see that 48 gallons of white paint mix with 12 gallons of black Paint.

So 1 gallon of black paint is mixed with 48/12 = 4 gallons of white paint.

8 0
3 years ago
Work out the size of angle x.
Citrus2011 [14]

Answer:

180°-100°= 80°

x=80°

hope this is enough

6 0
3 years ago
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