Answer:
44
Step-by-step explanation:
substitute x = 4 and y = 12 into the expression
5x² - 3y
= 5(4)² - 3(12)
= 5(16) - 36
= 80 - 36
= 44
a|| b then
<6=<4=<2=146
4
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3:5
5a + 3b = 6b
5a=6b-3b
5a=3b
a/b= 3/5
a:b=3:5
