9514 1404 393
Answer:
A, B, D
Step-by-step explanation:
"x increased by 15%" means "x plus 15% of x".
This can be written several ways.
x + 15%x . . . . . . a direct translation
x + 15/100x . . . . matches choice B
x +0.15x . . . . . . with the percentage as a decimal
(1 +0.15)x . . . . . . matches choice D
1.15x . . . . . . . . . . matches choice A
_____
Additional comment
It can be helpful to remember that % is a shorthand way to write /100. That is ...
15% = 15/100
It can also be helpful to remember place value:
15/100 = "fifteen hundredths" = 0.15
