Step-by-step explanation:
1/a = 1/b + 1/c
Multiply both sides by a.
1 = a/b + a/c
Multiply both sides by b.
b = a + ab/c
Multiply both sides by c.
bc = ac + ab
Subtract ab from both sides.
bc − ab = ac
Factor b.
b (c − a) = ac
Divide both sides by c − a.
b = ac / (c − a)
0 to 12 bags is the correct answer, 12 bags will put her at exactly $40. This means she cant have more than 12 bags.
20. it is in the tens place
Answer:
18a + 12x - 12a + 15x
6a + 27x
the answer is a
Step-by-step explanation:
12(0.59)= 7.08
10-7.08= 2.92
Sofia will get $2.92 in change.
Hope this helps!