How can you find x and y in a problem
ex:
if a bag of pretzels cost x dollars and a drink cost y dollars, what expression could you use
to write how much you spend in all

Ax + By

Step-by-step explanation:

let the number of bags of pretzels bought be A

let the number of drinks be B.

therefore the equation for the total cost C,becomes:

C = Ax + By

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'.