Solve for
y
y in
5
x
−
y
=
8
5x−y=8.
y
=
5
x
−
8
y=5x−8

2 Substitute
y
=
5
x
−
8
y=5x−8 into
2
0
x
−
4
y
=
2
4
20x−4y=24.
3
2
=
2
4
32=24

3 Since
3
2
=
2
4
32=24 is not true, this is an inconsistent system.

6 0

3 years ago

Tommy Took a test which has 20 questions . The total grade was computed by awarding 10 points for each correct answer and deduct

siniylev [52]

Bf DBD DBD skisbsbbe wisusvvs wjshshs

3 0

3 years ago

Engineers must consider the breadths of male heads when designing helmets. The company researchers have determined that the popu

Tju [1.3M]

Answer:

a) 3.3352 inches.

b) 8.2648 inches.

Step-by-step explanation:

When the distribution is normal, we use the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this question:

$\mu = 5.8, \sigma = 1.2$