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.

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MsEHolt MsEHolt · Answer 1 · 2018-12-21T03:11:28+01:00

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.

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MrRoyal MrRoyal · Answer 2 · 2021-12-16T10:18:16+01:00

The expression that represents the number of minutes Caleb spends practicing instruments after d days is 50d

The rates are given as:

[tex]Piano= 20\ minutes[/tex]

[tex]Guitar= 30\ minutes[/tex]

The total number of minutes spent on practicing instruments daily is:

[tex]Daily = Piano + Guitar[/tex]

So, we have:

[tex]Daily = 20\ minutes + 30\ minutes[/tex]

[tex]Daily = 50\ minutes[/tex]

For d days, the total number of minutes is:

[tex]Total = Daily \times d[/tex]

[tex]Total = 50\times d[/tex]

[tex]Total = 50d[/tex]

Hence, the expression is 50d