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vesna_86 [32]
3 years ago
14

Please help me I really need help

Mathematics
1 answer:
siniylev [52]3 years ago
4 0

Answer:

b 33 i took test i know

Step-by-step explanation:

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Maths problem: three nuts and six bolts have a combined mass of 72g. four nuts and 5 bolts have a combined mass of 66g. find the
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3n+6b=72, 

3n=72-6b

n=24-2b  and we are also told that:

4n+5b=66  substituting in n found above into this equation gives

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96-8b+5b=66

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b=10 grams, and since from earlier we saw that n=24-2b

n=24-2(10)

n=24-20

n=4 grams

So the combined mass of one bold and one nut is:

10+4=14 grams
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The expression 7+7x is equivalent to the expression
lianna [129]

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Step-by-step explanation:

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If the measure of angle ACB is 65 degrees, find the measure of angle BCD
jolli1 [7]

Answer:

the answer is 25

Step-by-step explanation:

you take 65 and add 90 to it because there is an angle that is 90 and you should get 115 then you take 115 and subtract it from 180. and you will get 25 and 25 is your answer.

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Why is 2.38 not a probability?
Y_Kistochka [10]

Answer:

Probability can not exceed 1. If an event has a probability of 1, then the event is certain to happen. Example: if you have a bag of 5 blue marbles the probability that you will pull out a blue is 5/5 which simplifies to 1.

Step-by-step explanation:

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