The two numbers that add to make twenty and have a difference of 4 are 12 and 8
Answer:
$4.18
Step-by-step explanation:
You take $3.80 and multiply by it .1 (turn 10% into a decimal by moving the decimal to the right two places).
This gives you .38
Then you add .38 to $3.80 which gives you $4.18.
Well, 10x4=40 because 10+10+10+10=40 and that means your answer must be 40 ones or you asked something else.