book Maths Puzzle Numerical Ability

Solve each equation. Identify each equation as a conditional equation, an inconsistent equation, or an identity

1/2b - 1/2 = 1/4b

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book Other Question

ok i have done 21 of these and here are the ones i cant get...

Use log9^7=0.8856 and log9^4=0.6309 to evaluate each expression

log9^28
log9^49
log9^144
log9^15.75
I do not understand input-output tables. The directions say " Make an input-output table for the function. Use 0,1,2,and 3 as the domain" The first question says "y=3x+2" Please he