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sleet_krkn [62]
3 years ago
15

In height school me Shepard ran 4 laps in 5 and one halve minutes how long did it take him to run 1 lap

Mathematics
1 answer:
saveliy_v [14]3 years ago
5 0
The answer is B becasue if you have 20 less 5 its going to be 15 

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The length of time to complete a door assembly on an automobile factory assembly line is normally distributed with a mean of 6.7
hram777 [196]
We need to work out the z-value of each question to work out the probability

Question a)

We have
X = 5 minutes
The mean, μ = 6.7 minutes
Standard deviation, σ = 2.2 minutes
z-score = (X - μ) / σ = (5 - 6.7) / 2.2 = -0.77

We want to find the probability of z < -0.77 so we read the z-table for the value of z on the left of -0.77 we have the probability P(z< -0.77) = 0.2206

The table is attached in picture 1 below

The probability of assembly time less than 5 minutes is 0.2206 = 22.06%

Question b)

z-score = (10-5) / 2.2 = 2.27

Reading the z-table for P(z<2.27) = 0.9884
The table reading is shown in the second picture below

The probability the assembly time will be less than 10 minutes is 0.9884

We can use this information to find the probability of the assembly time will be more than 10 minutes  = 1 - 0.9884 = 0.0116 = 1.16%

Question c)

The value of z between 5 minutes and 10 minutes is

P(-0.77<z<2.27) = P(z<2.27) - P(z< -0.77)
P(-0.77<z<2.27) = 0.9884 - 0.2206 = 0.7678 = 76.78%


6 0
3 years ago
Pls solve fast ! I’m begging you ! The lesson is operations on functions
Oliga [24]

Step-by-step explanation:

1a. Just add both of them.

8x - 3 + 4x + 5 = 12x + 2

1b. We just subtract both of the functions.

(8x - 3) - (4x + 5) =

4x - 8

1c.

(8x - 3)(4x + 5)

32 {x}^{2}  + 28x - 15

1d.

\frac{8x - 3}{4x + 5}  = 2 - \frac{13}{4x + 5}

3 0
2 years ago
The answer to the following q.
Katen [24]

Answer:

See below ~

Step-by-step explanation:

Given :

⇒ m∠1 = m∠2

⇒ HD = GF

=============================================================

To Prove :

<u>Δ EHD ≅ Δ EGF</u>

<u />

============================================================

Solving :

⇒ m∠1 = m∠2 (Given)

⇒ HD = GF (Given)

⇒ ∠E = ∠E (Common angle)

⇒ ΔEHD ≅ ΔEGF (AAS congruence)

3 0
1 year ago
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Which inequalities can be used to find the solution set of the following inequality? Check all that apply.
VikaD [51]

Answer: its A and D

4 0
3 years ago
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The vertices of rhombus DEFG are D(1, 4), E(4, 0), F(1, –4), and G(–2, 0).
musickatia [10]
20 units im shure i took the test'

7 0
3 years ago
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