Answer:
option b is the answer of your question
Answer:
True
Step-by-step explanation:

Answer:
83
Step-by-step explanation:
x+7+90
x=83
Answer:
i think D
Step-by-step explanation:
431.2+826.4d=2910.4
431.2 is only the first day therefore it doesn't need the variable because the variable represents the number of days. 826.4 even says "each remaining day" referring to what the variable represents.