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2 years ago

(6x+1/2)+(2x-8 1/2)Simplify the expression.

Mathematics

1 answer:

ella [17]2 years ago

7 0

Answer:

simplified = 8x - 8

Step-by-step explanation:

trust me :)

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8x + y = 20<br> x - 2y = -6

OleMash [197]

Answer: the answer is

Step-by-step explanation:

6 0

2 years ago

Quality control studies for Speedy Jet Computer Printers show the lifetime of the printer follows a normal distribution with mea

Anika [276]

Answer:

About 3 years Speedy Jet printers be guaranteed.

Step-by-step explanation:

Given : Quality control studies for Speedy Jet Computer Printers show the lifetime of the printer follows a normal distribution with

mean $\mu = 4$ and standard deviation $\sigma = 0.78$

If the company wishes to replace no more than 10% of the printers.

To find : How long should Speedy Jet printers be guaranteed ?

Solution :

Using Z- table,

Z value corresponding to 10% or 0.10 = -1.28.

Applying z-score formula,

$z=\frac{x-\mu}{\sigma}$

The value of x is given by,

$x=(z\times \sigma)+\mu$

Substitute the values,

$x=(-1.28\times 0.78)+4$

$x=-0.9984+4$

$x=3.0016$

So, approx 3 years.

Therefore, About 3 years Speedy Jet printers be guaranteed.

8 0

2 years ago

5 is 5% of what number w

navik [9.2K]

5 = 0.05w
5 / 0.05 = w
100 = w........5 is 5% of 100

3 0

2 years ago

Read 2 more answers

Three expressions equivalent to the following: -90x + 60

Deffense [45]

Answer:

33beacuse you i have -90×+60=9×6=369-63

3 0

3 years ago

Find x round to the nearest tenth

jeka94

<h3>Answer: angle X = 70.5 degrees</h3>

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Work Shown:

Law of Cosines

c^2 = a^2 + b^2 - 2ab*cos(C)

22^2 = 20^2 + 18^2 - 2*20*18*cos(X)

484 = 724 - 720*cos(X)

484 + 720*cos(X) = 724

720*cos(X) = 724 - 484

720*cos(X) = 240

cos(X) = 240/720

cos(X) = 1/3

X = arccos(1/3)

X = 70.528779

X = 70.5

Make sure your calculator is in degree mode.

7 0

3 years ago