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2 years ago

Can i please get help with these

Mathematics

1 answer:

Kryger [21]2 years ago

8 0

Answer:

7. x=3, 8. x=7, 9. x=15.

Step-by-step explanation:

7. If lines m and n are congruent, then angles DCF and CFE are congruent. 15x+3=18x-6. Solve for x. --> 15x+9=18x-->3x=9-->x=3

8.If line m is parallel to line n, then the corresponding angles are congruent. So, 20x+1=22x-13 Solve for x. 20x+14=22x-->14=2x-->x=7.

9. The supplementary angle of 110 is 70. Note that all of the inner angles of a triangle are equal to 180. Form an equation using the the values: (4x+8)+(2x+12)+70=180. Simplify; 6x+90=180. Solve for x: 6x+90=180-->6x=90-->x=15.

Hope this helps!

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2 years ago

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Answer:

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2 years ago

How to I find this? I tried using Pythagorean theorem, but it didn't work

jarptica [38.1K]

The Pythagorean theorem works.

$12^2+9^2=c^2$
$144+81=c^2$
$225=c^2$
$15=c$

Therefore the perimeter is 12 + 9 + 15 = 36 in. (B)

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3 years ago

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2 years ago

I need help a,b,or c

horrorfan [7]

Answer:

B, 150

Step-by-step explanation:

use pythagorean theorem, the sides of the triangle are 120 and 90, so when u square them and add them together, you get 120^2 +90^2 = 22500

square root 22500 to find the hypotanuse which is the length from one corner to another. the anwser is 150m which is b

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2 years ago