Erinkim7608
16.03.2020 •
Mathematics
Try it
Evaluate the expression 3(x - 1)
+ 2x - 7 for 2 = 3.
Step 1: What is the first step for evaluating this
expression?
Substitute 3 for x.
Distribute the 3.
Combine like terms
Solved
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Ответ:
Thus ∠C is an angle Identical to ∠A
And given the rule of thumb; "every angle on a triangle. must add up to 180°"
∠A + ∠C = 130°
180° - 130° = ∠B
∠B = 50°