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3 years ago

Please help and explain! Serious answers only 30 points :)

Mathematics

2 answers:

topjm [15]3 years ago

4 0

Ok so it's a proportion so this fraction is to this fraction. the smaller rectangle has sides 4 and 12. the larger one has 8 and x. so u set it up 4/12=8/x. the 4 and 8 r both the short sides so u want those on top and 12 and x r long sides so those on bottom. since that is not an answer option u can set it up as 8/4=x/12 because u still keep the variables of the same rectangle from being multipled with each other. so answer #2 is correct

GREYUIT [131]3 years ago

3 0

What you have highlighted right now is correct. Because the rectangles are similar (proportional): l of rect 1 / l of rect 2 = w of rect 1 / w of rect 2

So, B. is the correct answer!

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3 years ago

“Use the graph or table to write a linear function that relates y to x”

Igoryamba

Answer:

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2 years ago

A certain manufacturing plant produces electric fuses of which 20% are defective. Find the probability that in a sample of 8 fus

OverLord2011 [107]

Answer:

0.419

Step-by-step explanation:

To calculate this, we shall make use of Bernoulli approximation of Binomial distribution

if 20% are defective, then 80% are not defective

Probability of selecting a defective fuse is 20/100 = 0.2

Probability of selecting a non defective one is 0.8

Probability of at least 1 being defective is = 1 - Probability of none being defective

Mathematically that will be;

0.8^8 = 0.168

The above is probability of none defective

So the probability of at least one will be

1 - 0.168 = 0.832

Probability of not more than 1 means;

Probability of none + probability of 1 being defective

We already have probability of none above

Probability of 1 being defective means 8 will be non defective

The probability in this case is;

8 C 1 0.2^1 0.8^7

= 8 * 0.2 * 0.8^7 = 0.336

Add this to the probability of none = 0.336 + 0.168 = 0.504

So the probability that we want to calculate from the question will be;

Probability of at least one defective * probability of not more than one defective

= 0.832 * 0.504 = 0.419

6 0

3 years ago

you earned a 90% on a science test yoy answer 18 questions correctly how many questions were on the test

Talja [164]

X= entire test
if
18=.9x
then divide both sides by .9
18/ .9
and x = 20
20 questions total on the test

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3 years ago

Please help and explain! *Serious answers only* 30 points :)

Please help and explain! Serious answers only 30 points :)