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3 years ago

Please help! find measure of CDE

Mathematics

1 answer:

Umnica [9.8K]3 years ago

5 0

Answer:

170

Step-by-step explanation:

A heptagon's internal angles add up to 900 degrees.

So:

(2x-13)+(3x-8)+(2x-3)+(2x-7)+(3x-1)+(2x+11)+(2x+9) = 900

16x - 12 = 900

16x = 912

x = 912/16

x = 57

So:

3x - 1 = 3 * 57 -1 = 170

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2 years ago

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3 years ago

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3 years ago

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Rudiy27

Answer: y=11.

Step-by-step explanation:

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$y^2-6y_1+45=100\\y_1^2-6y_1-55=0\\y^2_1-6y_1-5y+5y-55=0\\y^2_1-11y_1+5y_1-55=0\\y_1*(y_1-11)+5*(y_1-11)=0\\(y_1-11)*(y_1+5)=0\\y_1-11=0\\y_1=11.\\y_1+5=0\\y_1=-5\notin\ (y_1 > 0).$

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2 years ago

Find the height of the pyramid. Volume = 198 yd 9 yd 11 yd The height is yards.

Rzqust [24]

Answer:

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Step-by-step explanation:

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3 years ago

Please help! find measure of CDE ​

Please help! find measure of CDE