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kow [346]
3 years ago
10

Please help me! thanks :)

Mathematics
2 answers:
Lilit [14]3 years ago
8 0
M<STR = 180 - 8x  degrees
also m < SRT = 180-8x ( because side RS = side ST, so isosceles triangle)
So 
7x - 54 + 180 - 8x = 8x  (ext. angle of triangle =sum of opposite internal angles)

7x - 8x - 8x = -180 + 54 = -126
-9x = -126
x = 14 answer
inna [77]3 years ago
4 0
The sum of the measures of the angles of a triangle is 180 degrees.

Angles STU and STR are supplementary angles.
Angles R and STR are congruent.

m<STU + m<STR = 180

8x + m<STR = 180

m<STR = 180 - 8x

m<R = m<STR = 180 - 8x

m<RST + m<R + m<STR = 180

7x - 54 + 180 - 8x + 180 - 8x = 180

-9x + 360 = 180

-9x = -126

x = 14
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6 0
2 years ago
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Anettt [7]
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3 years ago
How do I solve this problem
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3 0
2 years ago
Pls see attached question
zimovet [89]

Answer:

Step-by-step explanation:

put it on a coorinate grid,

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2 years ago
Evaluate (-B)2 for A = 5, B = -4, and C = 2.
xeze [42]

Answer

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Step-by-step explanation:

-B = -(-4) = 4 x 2 = 8

8 0
3 years ago
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