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.

80x^8−68x^6+16^5−20x^4−4x^3+8x^2

hope i'm right lol

answer: on graphs, the open and closed circles, or vertical asymptotes drawn as dashed lines us identify discontinuities.

as before, graphs and tables allow us to estimate at best.

when working with formulas, getting zero in the denominator indicates a point of discontinuity.

when working with piecewise-defined functions, check for discontinuities at the transition points where one piece ends and the next begins.

step-by-step explanation: