you are correct!

you purely ought to memorize some issues while working with fractions. To multiply fractions you purely multiply the numbers interior the numerators and then do an identical to the denominators. So… 3/5 x 3/4 x 2/3 = (3x3x2)/(5x4x3) = 18/60 and simplifying, we get 3/10. you additionally can circulate cancel as somebody pronounced in case you want to try this. to characteristic or subtract fractions, you ought to make the denominators an identical after which you upload or subtract the numerators. you’re making the denominators an identical via looking a great determination to muliply the denominator you desire to alter via, so it is going to become the numer you like it to be. you besides might have the diverse the numerator via it however. as an occasion 2/3 + 7/12 this is easiest to alter the two/3 by way of fact 3×4 = 12 so (4×2)/(4×3) + 7/12 = 8/12 + 7/12 considering that the two denominators are an identical now, purely upload the numerators 8/12 + 7/12 = 15/12 we are able to simplify this by way of fact 3 is going into 12 and 15. 3 is going into 15 5 cases by way of fact 3×5 = 15 and 3 is going into 12 4 cases by way of fact 3×4= 12 So we get 5/4

Yeah, they’re perpendicular.

mutually perpendicular