Answer:
x=3/5 or 0.6
Step-by-step explanation:
1st let's calculate r the common ratio:
r = (-20)/4 = (100/-20) = -5
Value of nth term = a₁.rⁿ⁻¹, where a₁= 1st term and n, the rank
Value of nth term = 4r⁽⁷⁻¹⁾ = 4.(-5)⁶
Value of nth term = 62,500
Answer: 20 is not
40 is not
64 is
4 is
49 is
48 is not
Step-by-step explanation:
represents the system of equations
Hope it helps
Plan D is the least expensive for him