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garik1379 [7]
2 years ago
11

Distributive property 21x4

Mathematics
1 answer:
12345 [234]2 years ago
5 0

Answer:

21*4 = 84.

Step-by-step explanation:

Multiply 2 by 4 to get 8.

Multiply 1 by 4 to get 4.

Move the 8 into the tens place and move the 4 into the ones place.

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Andrea and Ashley are middle distance runner's for the schools traffic and FaceTime in the 500 m race are approximately normally
swat32

Answer:

0.006 is the probability that the record will be broken in next year.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 62 seconds

Standard Deviation, σ = 0.8 seconds

We are given that the distribution of face time is a bell shaped distribution that is a normal distribution.

Formula:

z_{score} = \displaystyle\frac{x-\mu}{\sigma}

The record will be broken if the time is less than 60 seconds.

P(time is less than 60 seconds)

P(x < 60)

P( x < 60) = P( z < \displaystyle\frac{60 - 62}{0.8}) = P(z < -2.5)

Calculation the value from standard normal z table, we have,  

P(x < 60) =0.006 = 0.6\%

Thus, 0.006 is the probability that the record will be broken in next year.

6 0
3 years ago
The price of a car is 15,000. John got a 20% discount. Find how much is the discount and how much he will pay after the discount
My name is Ann [436]

<em>Answer:</em>

<em>12000</em>

<em>Step-by-step explanation:</em>

<em>20% of 15000 is 3000.</em>

<em>So he will pay 12000.</em>

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<em>Hope I helped you!</em>

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6 0
3 years ago
Help me solve it please
Anvisha [2.4K]

Answer:

m∠MBT = 28°

Step-by-step explanation:

Since m∠NBM = m∠MBT, the 2 equations are equal to each other.

Step 1: Set up equation

17x - 6 = 5x + 18

Step 2: Solve for <em>x</em>

12x - 6 = 18

12x = 24

x = 2

Step 3: Find m∠MBT

m∠MBT = 5x + 18

m∠MBT = 5(2) + 18

m∠MBT = 10 + 18

m∠MBT = 28°

3 0
3 years ago
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Sveta_85 [38]

Step-by-step explanation:

-81/2 =-40.5

-91/2 =-45.5

8 0
3 years ago
What is the product?<br> Sr-203r-40<br> O 157-8<br> 0157-8<br> O 15/+14-8<br> 0152²-140-8
aev [14]
Are u asking for each of them or just the first one?
5 0
2 years ago
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