Define $t: \mathbb{r}^3\to\mathbb{r}^2$ by $$t(x, y,z)=(3x-2y+5z+b,7x+axyz)$$show that $t$ is linear if and only if $a=b=0$.

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

Answer for 10 points show work you guys in advanced < 3

David estimated he had about 20 fish in his pond. a year later, there were about 1.5 times as many fish. the year after that, the number of fish increased by a factor of 1.5 again. the number of fish is modeled by f(x)=20(1.5)^x. create a question you could ask that could be answered only by graphing or using a logarithm.