If isosceles triangle abc has a 130° angle at vertex b, which statement must be true?
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Which of the following transformations does not preserve congruence? * 5 points a. (x, y) → (y − 3, x − 3) b. (x, y) → (x + 5, y − 1) c. (x, y) → (y + 9, −x + 2) d. (x, y) → (3x + 1, 3y − 2)

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

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