i am a number between 500 and 600. my ones digit is 5. my tens digit is the difference between my ones and hundreds digits. who am i

$4

step-by-step explanation:

$30×5=$150

$150 minus $130=$20

$20÷5=$4.

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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

yes

step-by-step explanation:

they have to be opposite and reciprocal of eachother.