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Anna007 [38]
2 years ago
10

Solve (4x – 5)2 = 9.

Mathematics
2 answers:
lyudmila [28]2 years ago
7 0

Answer:

x = 2 and 3/8

Step-by-step explanation:

(4x - 5)2 = 9

8x - 10 = 9

8x = 19

X = 19/8 or 2 and 3/8

Hope this helps! Pls give brainliest!

Kruka [31]2 years ago
3 0

Help this help
19/8 or 2 ,3/8
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Engineers must consider the breadths of male heads when designing helmets. The company researchers have determined that the popu
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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
25 POINTS plzz help☺️
mojhsa [17]
The answer is D because in order to find the area of a parallelogram you must multiply the base by the height which is 5 1/4 and 4 1/2. 

Hope this helped you and would love brainliest! 
8 0
3 years ago
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A popular video game claims that the average time needed to reach level 10 Paladin is 3 hours with a standard deviation of 0.4 h
ASHA 777 [7]
For the answer to the question above, first, we must calculate the standard error. The standard error is standard deviation divided by the square root of the sample. In this case, it is equal to 0.178. The z-score has defined the distance from the sample to the population mean in units of standard error.

z = (3 – 2.5)/0.178 = 2.81
at this z-score, the probability is 0.9974 or
if rounded off it is 1%
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Answer:

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Step-by-step explanation:

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