4. Express the ratios as a fraction without reducing. a. 6: 13
b.7:40
C. 45 : 36
d. 37:43

i do not know this sorry : (

step-by-step explanation:

the true statements are:

r = set of real numbers

n = set of natural numbers, 1,2,

w = n u{0} = {0,1,}

answer: 8d

step-by-step explanation:

45+5= 50+5=55+5=60

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