exam Maths Puzzle Numerical Ability

Bob paid $3 less than Tim at a local pizza parlor. Together they spent $7.80. How much did Bob spend at the local pizza parlor?

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exam Other Question

Find the solutions to the equation x^2+2x-8=0. Consistent linear equations can be(circle all correct answers)
A.inconsistent
B.independant
C.dependant
D.transient
does someone have an answer?