Let d (t) be the total number of miles Joanna has cycled and let t represent the number of hours after stopping for a break during her ride d (t) = 12t + 20 so d (4) equals

Step-by-step explanation:

Hi there!

d (4) = ?

where

d = distance

t = hours

In this Linear function given by the law d (t) = 12t + 20 and the graph below. To find the d (4), means to find out how many miles she cycled in the instant 4 hours.

By this function, after a break, the instant t=0, she had already cycled 20 miles.

Let's calculate

d (4) = 12 (4) + 20

d (4) = 48+20

d (4) = 68 miles

68 miles

Step-by-step explanation:

Given that d (t) = total number of miles Joanna has cycled

Given that t = number of hours fater stopping for a break during the ride

d (t) = 12t + 20

d (4) = ?

replace value of t with 4.

d (4) = 12*4 + 20

d (4) = 48+20=68 miles