Question

Matilda needs at least $112 to buy a new dress. She already has saved $40. She earns $9 an hour by babysitting. Write an inequality that can be used todetermine how many hours, X, Matilda will need to buy the dress?

Answer 1

40 + 9x ≥ 112.

9x ≥ 72.

Step-by-step explanation:

write the first equation shown above first, then subtract 40 from 40 and 40 from 112. when subtracting 40 from 40, do not use 0 later in the equation! 112 - 40 = 72. then write the second equation. divide 9x by 9 and divide 72 by 9. again, do not use 0 later on in the equation!!! 72 divided by 9 = 8. Matilda needs to work 8 hours in order to buy the dress. hope this helps! i will show a picture of my work below if that helps you understand better. <3

Answer 2

8

Explanation:

9*8 = 72 + 40 = 112