A(n)=a1 + (n-1)d
a1=12
d=5-12=-7
a(n) = 12+(n-1)(-7)
To find out the answer,we can test it out one by one:
The original expression: 6×(2+8)=60
A. 6x(8+2)= 6x10 = 60✅
B. (6×2)+8 = 24+8 = 34
C. (8+2)x6 = 10×6 = 60✅
D. 6x2÷6×8 =12÷6×8 = 2×8 = 16
As A. and C. equals to the original expression, the answer is A. and C.
Answer:
35 combinations
Step-by-step explanation:
(8/4)/2 + 6 = 7
8/4 = 2
2/2 = 1
1 + 6 = 7