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3 years ago

10. Find the value of x. (5x+12)° (3x+8)° 10 15 20 25

Mathematics

2 answers:

Natasha2012 [34]3 years ago

6 0

Answer:

x = 20

Step-by-step explanation:

The triangle has 2 congruent sides and is therefore isosceles with 2 congruent base angles, both 3x + 8

5x + 12 and 3x + 8 lie on a straight line and sum to 180° , that is

5x + 12 + 3x + 8 = 180

8x + 20 = 180 ( subtract 20 from both sides )

8x = 160 ( divide both sides by 8 )

x = 20

satela [25.4K]3 years ago

3 0

Answer:

3x+8+5x+12

8x+20=180

A. 80+20=100 No

B. 120+20=140 No

C. 160+20=180 Yes

D. 200+20=220 No

The Answer is C

Hope This Helps!!!

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The given coordinates of the vertices are;

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$Slope = \mathbf{\dfrac{y_2 - y_1}{x_2 - x_1}}$

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$Length \ of \ \mathbf{\overline{LI}} = \sqrt{(8 - (-1))^2 + (-9 - (-7))^2} = \underline{\sqrt{85}}$

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