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Find the value of a and b when x = 12
[tex]a = \frac{5x^2}{2}\\\\b = \frac{2x^2(x-5)}{10x}[/tex]


Sagot :

Answer:

a = 360

b = 16.8

Step-by-step explanation:

I think that's right

Answer:

360 and 16.8

Step-by-step explanation:

Substitute x = 12 into the expressions

a = [tex]\frac{5(12)^2}{2}[/tex] = [tex]\frac{5(144)}{2}[/tex] = [tex]\frac{720}{2}[/tex] = 360

b = [tex]\frac{2(12)^2(12-5)}{10(12)}[/tex] = [tex]\frac{2(144)(7)}{120}[/tex] = [tex]\frac{2016}{120}[/tex] = 16.8