Part a: sydney made $18.50 selling lemonade, by the cup, at her yard sale. she sold each cup for $0.50 and received a $3 tip from a neighbor. write an equation to represent this situation. (4 points)

part b: daria made a profit of $21.00 selling lemonade. she sold her lemonade for $0.75 per cup, received a tip of $3 from a neighbor, but also had to buy each plastic cup she used for $0.10 per cup. write an equation to represent this situation. (4 points)

d. millimeters per hour.

step-by-step explanation:

we are given that,

carlo used a rain gauge to measure the amount of water his lawn is receiving from the sprinklers.

since, according to the options, we see that,

water cannot be measured by 'miles per hour', 'meters per second' and 'grams per seconds'.

we get that, the water can be measured by 'millimeters per hour'.

hence, the appropriate rate for describing the amount of water is 'millimeters per hour'.

honesty mood

step-by-step explanation:

a. is correct

9 sandwiches per hour

step-by-step explanation:

when we have a rate, we want a 1 in the denominator

27/3 = 9

27 sandwiches/ 3 hours = 9 sandwiches/hour