Caleb practices piano 20 minutes per day, and he practices guitar 30 minutes per day. which expression represents the number of minutes caleb spends practicing instruments after d days? select each correct answer.

20d + 30d = 50d

Step-by-step explanation:

We know the variable d represents the number of days.

He practices piano 20 minutes per day; this gives us the expression 20d.

He practices guitar 30 minutes per day; this gives us the expression 30d.

Together, this gives us

20d + 30d; combining like terms gives us

50d.

idk

step-by-step explanation:

step-by-step explanation:

y = | -2(-2) |     →     y = | 4 |     →     y = 4       ⇒   (-2, 4)

y = | -2(-1) |     →     y = | 2 |     →       y =   2       ⇒   (-1, 2)    

y = | -2(0) |     →     y = | 0 |     →       y = 0         ⇒   (0, 0)

y = | -2(1) |   c →     y = | -2 |     →     y =   2         ⇒   (1, 2)    

y = | -2(2) |     →     y = | - 4 |     →     y =   4         ⇒   (2, 4)