Can someone please help me with these questions. Thank you. sorry there are alot but in not vert smart XD

True or false: the graph of y=f(bx) is a horizontal compression of the graph y=f(x) if b< 1

The ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry

Can some one explain how to slove specifically, what is the value of x? 0.9(x+1.4)-2.3+0.1x=1.6 enter the answer as a decimal in the box. x= ?