Answer:
I don't really get it, could you attach a picture ? please
Step-by-step explanation:
have an arithmetic sequence here....to find the common difference, subtract the first term from the second term. 13 - 3 = 10...so basically, ur adding 10 to each number to get to the next number.
before we find s5, we r going to find a5...because we need a5 to use in the sum formula.....a5 is the fifth term, and it is 43
sn = (n (a1 + a5) / 2
s5 = (5 (3 + 43) / 2
s5 = (5 (46)) / 2
s5 = 230/2
s5 = 115 <===
or, for this particular problem, s5 is the sum of the first 5 terms.
3 + 13 + 23 + 33 + 43 = 115.....u can do it this way for s5...but if u were asked to find s20, I suggest using the formula.
Answer: 0
Step-by-step explanation:
The disciminant \Delta tells you how many real solutions a quadratic equation has, depending on its sign:
\Delta>0\implies\text{2 solutions}\\\Delta=0\implies\text{1 solution}\\\Delta<0\implies\text{no solutions}
Remark
The question becomes "How long does it take her to drive 248 + 93 = 341 miles?"
Answer
Set up a simple proportion.
248/4 = 341/x Cross multiply
248 * x = 4 * 341
248 x = 1364 Divide by 248
x = 1364/248
x = 5.5 hours
But you are only asked about the 93 miles.
Answer: The number of hours for 93 miles is 5.5 - 4 = 1.5
