20 of the students chose maths and half of the rest chose pe how many of the students did not choose maths or pe?

Step-by-step explanation:

how how many students were there in the beginning

a 270° rotation about point p says on e d g e n u it y (had to space it out because it says it's a misspelling so i couldn't submit it

a. 12.5 kg

step-by-step explanation:

f = ma

so

m = f/a = (2500 n)/(200 m/s²) = 12.5 kg

1 n = 1 kg·m/s²