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2 years ago

Please help meeee!!!thanks

Mathematics

2 answers:

natita [175]2 years ago

5 0

Answer:

It's 7.

Step-by-step explanation:

Replace the p by 1/2 and the q by 7 and simplify:

8p + 3q - 18

= 8(1/2) + 3(7) - 18

= 4 + 21 - 18

= 25 - 18

= 7 (answer).

Andrew [12]2 years ago

4 0

Answer:

Hi there!

The answer to this question is: 7

Step-by-step explanation:

You simply plug in the values given and solve

8(1/2) + 3(7) -18

4+21-18=7

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The fracture strength of tempered glass averages 14.1 (measured in thousands of pounds per square inch) and has standard deviati

ololo11 [35]

Answer:

0.15866 is the probability of the average fracture strength of selected 100 pieces of glasses that of exceed 14.3.

Step-by-step explanation:

Given that, the strength of a tempered(x) a glass has average 14.1 and has standard deviation 2.

$\mu_x=14.1$ , $\sigma_x=2$

n=number of selected pieces= 100.

The probability that the average fracture strength of 100 pieces of this glass exceed 14.3 is

$P(\overline X>14.3)=P(\frac{\overline X-\mu_x}{2/\sqrt n}>\frac{14.3-14.1}{2/\sqrt{100}})$

$=P(\overline X>1)$

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= 1 - 0.84134

=0.15866.

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2 years ago

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ExtremeBDS [4]

Answer:

Length: 20 or 40 feet

Width: 40 or 20 feet

Step-by-step explanation:

Area = 800 = length*width = x*(60-x)= 60x - x^2

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x = 20

Or x = 40

So length can be either 20 feet or 40 feet and width can be 40 (60-20) or 20 (60-40)

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almond37 [142]

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