the sum of the tens digit and the hundreds digit of a 3 digit number is 3 times the unit digit. 1/5 of the sum of 3 digits is 1 less than the units digit

If x = 12 and y = 3, what is the value of x - y 2? 81 6 3 18

What is the x-intercept and y-intercept of the equation 2x+1. 2o

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.