9. Add the following: 3a + 4b - 5c, 4a - 2b + 3c, 6a + 9b + 70
10.Write the names of any three test used to prove any two triangles congruent,.
11.Solve the following: 4(x - 7) = 5(x +9)
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Answer:
1. 713a + 11b - 2c + 70
2. SSS test
SAS test
HYPO SIDE test
3. x = - 8
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SSS criterion , SAS criterion , ASA criterion.
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