Answer:
the answer is 5.
given, 2c-7c+8=-17
or, -5c=-17-5
or, c=-25/-5
therefore the value of c is 5...
Answer:

Step-by-step explanation:
given,
a₂ = 495
a₆ = 311
geometric sequence formula


...................(1)

................(2)
dividing equation (2) by (1)




hence, the common ratio of the geometric sequence is 
i would just answer somewhere near the bottom but since your not allowed to do that your answer is (4)(-5)(3)...leeme know if i helped...also..lemme know if i didnt help...
Answer:
1074.5 or 1074 1/2
Step-by-step explanation:
Unfortunately I can not answer this question because there are no underlined digits in your question