What is the value of a in the equation 3 a plus b equals 54, when b equals 9? 15
18
21
27

answer:

21. 10 - (-4)+(-8)

=10+4-8

=14-8

=6

30.5 (x-y)

=5 (-2-4)

=5×(-6)

=-30

she will sew have sewn five dresses   and be 1/3 done with the sixth one in an hour.

step-by-step explanation:

3/4 of an hour=45 mins

lucy makes 1 dress per 11.25 minutes

45 mins+11.25 mins=56.25 mins

60 mins- 56.25 mins=3.75 mins

3.75 mins is 1/3 of of 11.25 mins

therefore she the other 1/3 would be part of the hour and she will have sewn 5 dresses and begun the sixth.

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