Shannon is putting a fence around her garden, except where there is a gate that is 3 feet wide. One foot of the fence costs $43. The cost of the gate is $128. Write an expression that represents the total cost of the fence and gate.

x = the number of feet of fence

y = the total cost of the fence and gate

43x + 128 = y

[fence costs $43 per feet(x) plus the cost of the gate(128) equals the total cost of the fence and gate(y)]

answer: the angel abc is 30°,and the abc is a triangle where the angel bac is 90°

so ac is the half of 24=12ft,and from the pythagorean theorem we find ba

ba=√bc^2-ac^2=√576-144=√432=12√3ft

so bac is 12+12√3=12(1+√3)ft