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3 years ago

Answer this pleaseee

Mathematics

1 answer:

balandron [24]3 years ago

7 0

Answer:

do i need to answer them all

Step-by-step explanation:

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A car manufacturer is reducing the number of incidents with the transmission by issuing a voluntary recall. During week 10 of th

laila [671]

Answer:

f(x) = -5x + 250

3 0

3 years ago

Maria has 72 flowers and four vases she put the same number of flowers in each vase how many flowers are in one vase

Vlad [161]

The answer is 18. Divide 72 by four.

4 0

3 years ago

if you start from 0, how many steps do you have to take to get to -3. what does the number of steps represent

Leviafan [203]

Answer:

3 steps

Step-by-step explanation:

FIrst of all, if you think about it, we can just say -3 as 3 ( even though they are not equal, were just counting steps.)

On a number line, negative numbers are on the left of 0 and positive on the right of 0.

So, lets say the middle number is 0 on our number line. -3 is 3 steps to the left. We take 1 step to negative 1, another step to -2, and then a 3rd and final step to -3.

The steps represent how far the number is from 0. FIr example, we have to add 3 to -3 to get to 0, like how we add 7 to 0 to get 7!

Hope this helps!

5 0

3 years ago

Read 2 more answers

Suppose x has a distribution with μ = 10 and σ = 9. (a) If a random sample of size n = 43 is drawn, find μx, σ x and P(10 ≤ x ≤

JulsSmile [24]

Answer:

P(10 ≤ x ≤ 12) = 0.4274

Step-by-step explanation:

Population mean = u = 10

Population Standard Deviation = $\sigma$ = 9

Sample size = n = 43

Sample mean( $\mu_{x}$ ) is equal to the population mean. So,

Sample mean = $\mu_{x}$ = 10

Sample standard deviation( $\sigma_{x}$ ) is equal to population standard deviation divided by square root of sample size. So,

Sample standard deviation = $\sigma_{x}$ = $\frac{9}{\sqrt{43}}=1.372$

We have to find the probability that for a random sample of n = 43, the value lies between 10 and 12 i.e. P(10 ≤ x ≤ 12)

P(10 ≤ x ≤ 12) = P(x ≤ 12) - P( x ≤ 10)

We can find P(x ≤ 12 ) and P(x ≤ 10) by converting these values to z scores.

The formula for z score is:

$z=\frac{x-\mu_{x}}{\sigma_{x}}$

For x =12, we get:

$z=\frac{12-10}{1.3725}=1.457$

For x =10, we get:

$z=\frac{10-10}{1.3725}=0$

So,

P(x ≤ 12) - P( x ≤ 10) = P(z ≤ 1.457) - P(z ≤ 0)

From the z table,

P(z ≤ 1.457) = 0.9274

P(z ≤ 0) = 0.5

So,

P(x ≤ 12) - P( x ≤ 10) = P(z ≤ 1.458) - P(z ≤ 0) = 0.9274 - 0.5 = 0.4274

So,

P(10 ≤ x ≤ 12) = P(x ≤ 12) - P( x ≤ 10) = 0.4274

Therefore,

The probability that for a random sample of size 43, the mean lies between 10 and 12 is 0.4274.

8 0

3 years ago

Smith Engineering is in the process of reviewing the salaries of their surveyors. During this review, the company found that an

siniylev [52]

Answer:

T = 3.5 hours

Step-by-step explanation:

this is a rate problem.

an experienced surveyor takes 7 hours to survey a roadbed

an apprentice surveyor takes 9 hours to survey a roadbed

the rate of the experienced surveyor = $\frac{1}{7}$

the rate of the apprentice surveyor = $\frac{1}{9}$

if the two work together , $\frac{1}{T} =\frac{1}{7} +\frac{1}{9}$

T = $\frac{56}{16}$

T = 3.5 hours

3 0

3 years ago