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sertanlavr [38]
3 years ago
11

Which expression represents 10 times the sum of 2 and 1?

Mathematics
2 answers:
sergeinik [125]3 years ago
7 0
The expression would be

10(2+1)

have a great afternoon!!
lapo4ka [179]3 years ago
6 0
(2+1)10=30 is the correct answer if you also need to solve it:)
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Find the total surface area.<br> Thanks!
defon

Answer:

Your answer would be 326.72

Step-by-step explanation:

2(pie) x 4 x 9= (roughly) 326.72

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5 2/3 gave to her 4 friends how much did each one receive
Olin [163]

Answer:

Let's see what to do buddy...

Step-by-step explanation:

If it is 5 + 2/3

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Step (1)

First we have to find all she has :

5 \frac{2}{3} = 5 +  \frac{2}{3} =  \frac{5 \times 3}{3} +  \frac{2}{3} = \\   \frac{15}{3} +  \frac{2}{3} =  \frac{17}{3}

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Step (2)

To find how much did each of them receive , we must divided all by the number of her friends which is 4.

So we have :

\frac{17}{3} \div 4 =  \frac{17}{3} \times  \frac{1}{4} =  \frac{17}{12} \\

So each of her friends receive 17/12 .

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If it is 5 × 2/3

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Step (1)

Firs we have to find all she has :

5 \times  \frac{2}{3} =  \frac{10}{3} \\

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Step (2)

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So we have :

\frac{10}{3} \div 4 =  \frac{10}{3} \times  \frac{1}{4} =  \frac{10}{12} \\

So each of her friends receive 10/12 .

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And we're done.

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4 0
3 years ago
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Answer:

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2 years ago
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A real estate agent has 8 master keys to open several new homes. Only 1 master key will open any given house. If 40% of these ho
riadik2000 [5.3K]

Answer:

Step-by-step explanation:

Suppose F represents the value that a room is unlocked.

Then, we can assume that the probability of unlocked homes is:

P(unlocked homes) = P(U)

P(unlocked homes) = 40%

P(unlocked homes) = 0.40

Also, let us represent the value of the locked room with G.

P(locked homes) = P(G)

P(locked homes) = (1 - 0.40)

P(locked homes) = 0.60

Let the probability of selecting a correct key be P(S)

It implies that for the agent to use 3 keys, we have a combination of ^8C_3 possible ways for the set of keys.

Now; since only one will open the house, then:

P(select correct key) = P(S)

P(S) = \dfrac{ (^1_1) (^7_2)   }{   ^8_3 }

P(S) = \dfrac{21}{56}

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Finally, for the real estate agent to have access to specific homes supposing the agent select three master keys at random prior to the time he left his office, Then:

P(F ∪ (G∩S) = P(F) + P(G∩S)

P(F ∪ (G∩S) = P(F) + P(G) × P(S)

P(F ∪ (G∩S) = 0.40 + (0.60×0.375)

P(F ∪ (G∩S) = 0.40 + 0.225

P(F ∪ (G∩S) =0.625

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