Hope made 3 different yo-yo's. she used 1 3/4 meters of string for the first yo-yo, 1 meter of string for the second yo-yo, a total of 4 1/3 meters of string. hope uses the equation 1 3/4+1+y=4 1/3 to represent the situation. what does the variable y represent in the equation

Ill mark the brainliest if you me with the these three questions 7,8,9

If m∠abc = 70°, what is m∠abd? justify your reasoning.  using the addition property of equality, 40 + 70 = 110, so m∠abd = 110°.  using the subtraction property of equality, 70 − 30 = 40, so m∠abd = 30°.  using the angle addition postulate, 40 + m∠abd = 70. so, m∠abd = 30° using the subtraction property of equality.  using the angle addition postulate, 40 + 70 = m∠abd. so, m∠abd = 110° using the addition property of equality.

The number of calories you burn depends on your weight. a 110-pound person burns 163 calories during 30 minutes of tennis. find the number of calories that a 190-pound person would burn during the same activity, assuming they burn calories at the same rate.