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storchak [24]
3 years ago
13

HELP DUE IN 15 MINS!

Mathematics
1 answer:
enot [183]3 years ago
3 0

Answer:

m∠1 = 25° (opposite angles are congruent)

m∠2 = 87° ⇒ 180 - (25 + 68)

m∠3 = 68° ⇒ 180 - (87 + 25)

Hope this helps!

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By what percent will a fraction change if its numerator is decreased by 20% and its denominator is decreased by 60%?
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Answer:

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Step-by-step explanation:

Say the fraction is x/y. The question is telling us to decrease x by 20% (i.e. 0.8x) and to decrease y by 60% (i.e. 0.4y):

= \frac{0.8x}{0.4y}\\= 2 (\frac {x}{y})

You can see that by applying these changes, the new fraction is actually double the old fraction (i.e. will increase by 100%).

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Answer:

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Step-by-step explanation:

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Volgvan
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In other words, if a substance has a mass of 0.55 grams and you measure it to be 0.80 grams, then the percent of error would be:

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