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a_sh-v [17]
3 years ago
15

∡C and ∡D are supplementary angles. If m∡D is nine less than twice m∡C, find m∡D.

Mathematics
1 answer:
Gala2k [10]3 years ago
6 0

Answer:

D is 117

Step-by-step explanation:

Let the measure of angle C be x

The measure of D is 9 less than twice C

Mathematically that is 2x-9

If both are supplementary, they add up to be 180

Thus;

x + 2x - 9 = 180

3x = 180 + 9

x = 189/3

x = 63

Recall;

D = 2x-9= 2(63) -9 = 126 -9 = 117

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The ball game sold $1,340 in tickets one Saturday. The number of $12 adult tickets was 15 more than twice the number of $5 child
7nadin3 [17]

Answer: 95 adult tickets and 40 child tickets were sold.

Step-by-step explanation:

Let x represent the number of adult tickets that were sold.

Let y represent the number of child tickets that were sold.

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The ball game sold $1,340 in tickets one Saturday. It means that

12x + 5y = 1340- - - - - - - - - - 1

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x = 2y + 15

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4 years ago
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tatiyna

Answer:

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Step-by-step explanation:

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4 years ago
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==========================================================

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