PLS HELP ILL MARK BRAINLIEST

What is the value of n in the equation -1/2(2n+4)+6=-9+4(2n+1)

Find the vertex for the parabola given by the function ƒ(x) = −3x2 − 6x.

Given the lease terms below, what monthly lease payment can you expect on this vehicle? terms: •length of lease: 60 months •msrp of the car: $28,500 •purchase value of the car after lease: $12,900 •down payment: $1900 •lease factor: 0.0005 •security deposit: $375 •aquisition fee: $300 a.$232.50 b.$279.99 c.$227.50 d.$248.08