Question

Harita must memorize 90 measures of music for her cello solo at a concert. She plans on memorizing 18 new measures for every 3 days of practice. Which equation can be used to determine m, the number of measures Harita still needs to memorize, as a function of d, the number of days of practice since she began learning the piece?

m = 72 – 15d
m = 90 – 6d
m = 101 – 21d
m = 108 – 3d

Answer 1

Sorry this is late but it is m = 90 – 6d

Explanation:

Got this right on edge!

Answer 2

Answer: m = 90 – 6d

Explanation:-

Total measures of music for cello solo at a concert=90

Number of measures she memorize music for cello solo at a concert in 3 days=18

⇒Number of measures she memorize music for cello solo at a concert in 1 day=
`(18)/(3)=6`

Thus the equation can be used to determine the number of measures can be m=total measures-6 times days=90-6d

∴m=90-6d