A daycare center charges $3 per hour for preschool-aged children and $4 per hour for infants and toddlers. This equation represents the number of preschoolers, x, and infants and toddlers, y, at the daycare center in an hour when it earns $180: 3x + 4y= 180. graph the relationship?​

Which of the following system of equation is not equal to the system of equations is not equal to the system of equations shown below

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.

Ateam of runners is needed to run a 1 2 -mile relay race. if each runner must run 1 4 mile, how many runners will be needed?