Answer:
good
Step-by-step explanation:
Answer:
33.45
Step-by-step explanation:
Just multiply
Just put it like normally, forget the decimal for now, you don’t have to line it up due to it not being addition Or subtraction
You’ll get 3345 without the decimal
now there are 2 decimal places from 0 so
just move the decimal place 2 times to the left
33.45
Answer:
29.79 should be the answer
Step-by-step explanation:
200 copies 19.50 + 9.00 for 100 copies = 28.50 + 4% = 29.79
Answer:
72 Wrong, so find how many are right with 135 total
Step-by-step explanation:
It's similar to saying if she answered half and this continued how many would she have answered after answering a bigger number, you would say half.
so she answered 8/15 incorrectly a a smaller number, so she will answer that ratio with a bigger number. If it helps 8/15 is about 53%. just like 1/2 is half. So to find half you would multiply something by 1/2 and int he same way you multiply something by 8/15 to get that proportion of it.
so 135, if you take this 53%, or simply multiply it by 8/15 you get your answer of 72. So 72 wrong so al others are right, which you get with 135-72 = 63.
You could also do 135*(1-8/15) = 135 * 7/15. if you ever want to find something NOT part of the proportion you do 1 - that proportion.
