The formula for a sequence with first term = 1.7 and common difference 0.5 is: 
Step-by-step explanation:
The first term and common difference are used to induce a formula for the arithmetic sequence
The explicit formula for a geometric sequence is:

Given
First term = a1 = 1.7
Common Difference = d = 0.5
putting the values in the formula

The formula for a sequence with first term = 1.7 and common difference 0.5 is: 
Keywords: Arithmetic sequence, Common difference
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2x(x-1) has the least common denominator
Answer:
It's already simplified to its lowest term so....
<span>RS= 8y + 4, ST = 4y + 8, and RT = 36
RS + ST = RT
</span>8y + 4 + 4y + 8 = 36
12y + 12 = 36
12y = 24
y = 2
answer
y = 2 (first choice)