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xz_007 [3.2K]
2 years ago
14

12. 8+ 6^2_11 + 7 x 2

Mathematics
2 answers:
Rudiy272 years ago
6 0

Answer:

\frac{8 +  {6}^{2} }{11}  + 7 \times 2 \\  \\  \frac{8 + 6 \times 6}{11}  + 7 \times 2 \\  \\  =  \frac{8 + 36}{11}  + 7 \times 2 \\  \\  =  \frac{44}{11}  + 7 \times 2 \\  \\  = 4 + 14 \\  \\   = 18

denis23 [38]2 years ago
4 0

Answer:

18

Step-by-step explanation:

8+6^2/11 + 7 x 2

Using PEMDAS (Parenthesis -> Exponent -> Multiplication -> Division -> Addition -> Subtraction)

Solve the exponent

6^2 = 36

Solve the division problem

8 + 36 = 44

44/11 = 4

Multiply First

4 + 7 x 2

7 x 2 = 14

Then add

4 + 14 = 18

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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}

P(S) = 0.375

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

5 0
2 years ago
The net of a cube is shown. If the length of each edge of the cube is 10 cm, find the surface area of the cube.
Digiron [165]

Answer:The surface area of the cube is 100 cm.

Step-by-step explanation:

So since a cube has six faces and all of its lengths are equal. we could use the equation.

10^2 *6= 100 *6= 600

3 0
3 years ago
A salesperson obtained a systematic sample of size 25 from a list of 500 clients. To do​ so, he randomly selected a number from
dangina [55]

Answer: Option 'D' is correct.

Step-by-step explanation:

Since we have given that

First term = 13

Increase each time = 20

Number of clients = 25

So, it forms an arithmetic progression:

So, 25 th term would be

a_{25}=a+(n-1)d\\\\a_{25}=13+(25-1)\times 20\\\\a_{25}=13+24\times 20\\\\a_{25}=13+480\\\\a_{25}=493

Hence, list would look like 13,33,............493.

Therefore, Option 'D' is correct.

3 0
3 years ago
(5 + 2)to the second power - 40 + 3
natulia [17]
12 hope this helped          
8 0
3 years ago
Read 2 more answers
Algebra work need help<br> please show working
Nastasia [14]

Expand the left side:

(3x + 2) (5x + 1) = 15x² + 10x + 3x + 2 = 15x² + 13x + 2

Then a = 15 and b = 13, so a - b = 2.

8 0
2 years ago
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