What is the formula to calculate Z score from percentile rank? Like can you say, how do you calculate the value of z score as 0.67 on Percentile 75 ? urgently needed
Please send a picture with method or explain the steps plz ​

This is so hard and it’s for a test

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.

Solve each quadratic equation by factoring and using the zero product property. x^2 - 8x + 30 = 3x