Riley wants to make 100 mL of a 25% saline solution but only has access to 12% and 38% saline mixtures.

a. 74 degrees

step-by-step explanation:

because the lines through the side and the box in the corners shows that these are congruent triangles and since they are mirrored the 37 degrees is also mirrored so the answer is 37 * 2 which is 74.

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c ) y = 2.5 x - 26.25