Y=3
x=-5
x=-5/2
x=-10
.....................
Answer:
10
Step-by-step explanation:
75c-300=25c+200
-25c -25c
50c-300=200
+300 +300
50c=500
c=10
Answer:
B. 199
Step-by-step explanation:
We are given an Arithmetic sequence : 3, 7, 11, 15, ...
We are supposed to find the 50th term .
So, first consider the formula of nth term in Arithmetic mean:

where
a is first term of sequence
n is term position
d is common difference
= the term you are supposed to find
Now,
a = 3 ( first term )
n = 50 th term ( given )
d = 7-3 = 11-7 = 4(common difference
Substitute these value in the formula given above
⇒
⇒
⇒
⇒
Hence ,The 50th term of given arithmetic sequence is 199
So, OPTION B is correct .
Use pythagorean theorum: c^2 = a^2 + b^2, where BC = c, AB = a, AC = b
so b^2 = c^2 - a^2 --> b = SR(c^2 - a^2), where SR means square root of ( )
b = SR(64 - 49) = SR(15) = 3.873 = B) 3.87 units