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3 years ago

PLEASE HELP!

Mathematics

1 answer:

Orlov [11]3 years ago

3 0

We have that
<span>If (5x-4+13x=5) --------------> then x=1/2
Step 1
</span>let's substitute the value of x = (1/2) in the expression [5x-4+13x] and verify its result
5*(1/2)-4+13*(1/2)
(5/2)-4+(13/2)
(5-4*2+13)/2----------> (5-8+13)/2=10/2=5
then
5=5-----------> <span>the value of x = (1/2) satisfies equality</span>

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Answer:

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3 years ago

Seven balls are randomly withdrawn from an urn that contains 12 red, 16 blue, and 18 green balls. Find the probability that (a)

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Answer:

a) P=0.226

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c) P=0.0008

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Step-by-step explanation:

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We calculate the probability withdrawn of 1 or none of the red balls.

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We calculate the number of favorable combinations: for 1 red balls

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Therefore, the probability is

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We calculate the number of possible combinations:

$C_7^{46}=\frac{46!}{7!(46-7)!}=53524680$

We calculate the number of favorable combinations:

$C_7^{12}+C_7^{16}+C_7^{18}=792+11440+31824=44056$

Therefore, the probability is

$P=\frac{44056}{53524680}\\\\P=0.0008$

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We have

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