I believe that would be -4.50 for problems like this you subtract then add the negative sign in front
i'm surprised you are in high school i did this in 6th grade
Ex: 7^3=(7×7×7) --- 7×7=49×7=343
$20 × 1.8 (180% in decimal form) = 36
$36 is how much you spent the 2nd
Brainliest please!
