Shelf A had 40 books and Shelf B had 16 books. After Abigail borrowed an equal number of books from Shelf A and Shelf B, there were 3 times as many books on Shelf A than on Shelf B. How many books did Abigail borrow altogether?

13

step-by-step explanation:

169-1=168

168-3=165

165-5=160

160-7=153

153-9=144

144-11=133

133-13=120

120-15=105

105-17=88

88-19=69

69-21=48

48-23=25

25-25=0

since it took 13times to completely subtract it hence its square root is 13

the mistake in the pattern is that :

b. the decimal point was moved one too many place values each time

the correct pattern could be made by :

b. moving the decimal point to the right the same numbers of place values as the exponents

x equals 1

step-by-step explanation:

f(4)=f(×)

x=1

hi there!

the answer will be d: 2