What is 60+(-30)+40-80

60-30=30×40=70-80=-10

if the number of negatives are even they are always positive. if the number is odd of negatives. it always is negative. -- = + --- =-

y=mx+b

step-by-step explanation:

m slope, b y-intercept

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