Answer:
$514.50
Step-by-step explanation:
7+4+2+8=21
$12.25x21=$514.50
Answer:
n-5=6
Step-by-step explanation:
five less than a number is represented by n-5 and then it is equal to 6
(c) multiply by 0.4
given 
= 10
multiply both sides by 0.4 to eliminate the fraction
x = 0.4 × 10 = 4
and 
= 10
1 sandwich cut into 8 pieces then eats 1 pieces,
then had 7/8 lefts means that 7 pieces left, if he put each mean put 1 pieces in a plate, than he need 7 plates.
When he ate 1 piece, it means that he ate 1/8 or 1 out of 8 pieces.
he put 1/8 part of the sandwich on each plate.
