What is x for 7x plus 4 over 6 equals negative 4

Icould really use some with this question.

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5

Match each whole number with a rational, exponential expression 3 square root 27^2find the domain and range of the exponential function h(x)=125^x. explain your findings. as x decreases does h increase or decrease? explain. as x increases does h increase or decrease? explain.