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iragen [17]
3 years ago
14

Duane recorded the temperature outside his window one morning. On the second day,

Mathematics
1 answer:
larisa86 [58]3 years ago
7 0

Answer:

C

Step-by-step explanation:

day 2 = +7\\\\day3 = -10\\\\day 4 = -6\\\\FinalDay = 1

so start +7 -10-6 = 1\\ \\start = 10

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A train traveled 1/5 of the distance between two cities in 3/4 of an hour. At this rate, what fraction of the distance between t
lana66690 [7]

Answer:

1/5x=3/4 hour

so since 5 times 1/5=1 then

find x

multiply both sides by 5

x=15/4 hour=3 and 3/4 hour=3 hour and 45 mins

Step-by-step explanation:

Hope this helps :)

Brainlest?

6 0
2 years ago
Engineers must consider the breadths of male heads when designing helmets. The company researchers have determined that the popu
vitfil [10]

Answer:

a) The minimum head breadth that will fit the clientele = 4.105 inches to 3d.p = 4.1 inches to 1 d.p

b) The maximum head breadth that will fit the clientele = 8.905 inches to 3 d.p = 8.9 inches to 1 d.p

Step-by-step explanation:

This is normal distribution problem.

A normal distribution has all the data points symmetrically distributed around the mean in a bell shape.

For this question, mean = xbar = 6.1 inches

Standard deviation = σ = 1 inch

And we want to find the lowermost 2.3% and uppermost 2.3% of the data distribution.

The minimum head breadth that will fit the clientele has a z-score with probability of 2.3% = 0.023

Let that z-score be z'

That is, P(z ≤ z') = 0.023

Using the table to obtain the value of z'

z' = - 1.995

P(z ≤ - 1.995) = 0.023

But z-score is for any value, x, is that value minus the mean then divided by the standard deviation.

z' = (x - xbar)/σ

- 1.995 = (x - 6.1)/1

x = -1.995 + 6.1 = 4.105 inches

The maximum head breadth that will fit the clientele has a z-score with probability of 2.3% also = 0.023

Let that z-score be z''

That is, P(z ≥ z'') = 0.023

Using the table to obtain the value of z''

P(z ≥ z") = P(z ≤ -z")

- z'' = - 1.995

z" = 1.995

P(z ≥ 1.995) = 0.023

But z-score is for any value, x, is that value minus the mean then divided by the standard deviation.

z'' = (x - xbar)/σ

1.995 = (x - 6.1)/1

x = 1.995 + 6.1 = 8.905 inches

6 0
3 years ago
Consider the following number line.
pshichka [43]

Answer:

The choice A

Step-by-step explanation:

B+A=BA+BA+BA=3BA

6 0
3 years ago
Given f(x) = 3x+4 . What is f(8)
DerKrebs [107]
If x=8 {f(8)=3x+4}, the answer is 28.


Comment the correct answer. 
7 0
2 years ago
Read 2 more answers
Write the fraction as a percent. 9/20
RideAnS [48]

Answer:Write 9/20 as a percent. Use equivalent fractions: 9/20 = 45/100 = 45%.

Step-by-step explanation:

4 0
3 years ago
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