How do i find each product by factoring the tens? 3x2, 3x20, and 3x200

Aplot of land has been surveyed for a new housing development with borders ab, bc, dc, and da. the plot of land is a right trapezoid with a height of 60 feet and an opposite leg length of 65 feet

Let f(x) = 5/x and g(x)=2x2+5x. what two numbers are not in the domain of f o g

Divide. –40 ÷ –5 a –8 b 200 c -200 d 8