6(1 − 3d) < 2(7d + 6

\begin{bmatrix}\mathrm{Solution:}\:&\:d>-\frac{3}{16}\:\\ \:\mathrm{Decimal:}&\:d>-0.1875\\ \:\mathrm{Interval\:Notation:}&\:\left(-\frac{3}{16},\:\infty \:\right)\end{bmatrix}

Step-by-step explanation:

6-18d-6<14d+12-6

-18d<14d+6

-18d<14d+6

-32d<6

-32d<6

\frac{32d}{32}>\frac{-6}{32}

d>-\frac{3}{16}

Brainliest plz

no not all of them.

step-by-step explanation:

some of them have a square base.