A swim pass costs $30 for the first month. Each month after that, the cost is $20 per month. Riley wants to swim for 12 months.
The sequence for this situation is arithmetic. What is the
first term of this sequence?
What is the common difference?
The 12th term will be the amount Riley spends for a
one-year swim pass. Write the equation for finding the
total cost of a one-year swim pass.
What is the total amount of money Riley will spend for
a one-year swim pass?

- What is the first term of this sequence?

  30

- What is the common difference?

  20

- Write the equation for finding the total cost of a one-year swim pass.

  c = 20t + 10, c = cost, m = months

- What is the total amount of money Riley will spend for a one-year swim pass?

  Riley will spend $250 for a one-year swim pass.

Step-by-step explanation:

- What is the first term of this sequence?

  30, because the first month costs $30.

- What is the common difference?

  20, because the cost between one month and the next is $20.

- Write the equation for finding the total cost of a one-year swim pass.

  c = 30 + 20(t - 1) = 20t + 10, c = cost, m = months

- What is the total amount of money Riley will spend for a one-year swim pass?

  c = 20(12) + 10 = 240 + 10 = 250

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'.