Ascientist is designing an investigation to study which color of peppered moth would have a higher survival rate in his neighborhood. what is most likely the test variable (independent variable) in this investigation? a neighborhood environment b survival rate c number of predators d colors of peppered moths

D. Colors of peppered moths

Explanation:

In an experimental set up, an independent variable can be changed either by it's own or manually. This change can be observed over the dependent variable. The changes in the dependent variable can be observed so as to determine the outcome of the experiment.  

The independent variable is the test variable of the experiment and the dependent variable is the experimental variable.  

According to the condition, the color of the peppered moths is the independent variable, as it's affect is to be determined over the survival rate of the peppered moths which is the result of the experiment. The color may vary among the peppered moths.

there are 35 white marbles

step-by-step explanation:

y- yellow marbles

4y + 5 = 45

subtract 5 from both sides

4y = 40

divide for from both sides

y = 10

plug in 10 to get 40 yellow marbles then subtract by 5 to get 35 marbles

thus there are only 10 yellow marbles

condensation. good luck!