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3 years ago

I need help on this i dont get it and i need to bring my homework by tomorrow

Mathematics

1 answer:

natita [175]3 years ago

7 0

a ratio is how many X there are per Y. for example, a fraction is a ratio: 10/5 = 2 because there are 2 fives in a ten. but usually a ratio is written as x:y.

so to find these ratios, first we need to find the number of girls. 30 students-16 boys = 14 girls.

the ratio of girls to boys is 14:16 because there are 14 girls to every 16 boys. we simplify this to 7:8.

the ratio of girls to all students is 14:30. we simplify this to 7:15.

the ratio of boys to girls is 16:14, which simplifies to 8:7.

the ratio of boys to all students is 16:30, which simplifies to 8:15.

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3 years ago

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Anastaziya [24]

Answer:

x = 7, arc DE = 198°

Step-by-step explanation:

Inscribed angles from the same arc are congruent.

∠ DCE and ∠ DWE are inscribed angles from the same arc DE , thus

12x + 15 = 3x + 78 ( subtract 3x from both sides )

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The inscribed angle DCE is half the measure of its intercepted arc, thus

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