Answer:
$36
Step-by-step explanation:
20x.80=16
20+16=36
Hence, the original price is $36
Answer:
14x-4
Step-by-step explanation:
length:2x+3
width:5x-5
perimeter of rectangle:2(l+b)
:2(2x+3+5x-5)
:2(7x-2)
:14x-4
•••The perimeter of rectangle(p)=14x-4
A
this is an arithmetic sequence whose n th term ( explicit formula) is
=
+ (n - 1 )d
where d is the common difference and
the first term
here d = 10 - 8 = 8 - 6 = 6 - 4 = 2 and
= 4, hence
= 4 + 2(n - 1 ) = 4 + 2n - 2 = 2n + 2 → A