Answer:
-6.5
Step-by-step explanation:
x + 3.6 = -2.9
x= -6.5
The last one is the right answer
Answer:
x=1
Step-by-step explanation:
3x+2y=7
x-y+1=0
3x+2y=7
x-y=-1 /*2
3x+2y=7.... (1)
2x-2y=-2.... (2)
(1)+(2) 5x=5, x=5/5, x=1
Find an explicit formula for the arithmetic sequence -5,13,31,49,...−5,13,31,49,...minus, 5, comma, 13, comma, 31, comma, 49, co
dolphi86 [110]
Answer:
aₙ = a₁ + (n-1) * 18 a₁ = -5
Step-by-step explanation:
aₙ = a₁ + (n-1) * d a₁ = -5 d = 13 - (-5) = 18
a₂ = -5 + (2 - 1) * 18 = -5 + 18 = 13
a₃ = -5 + (3 - 1) * 18 = -5 + 36 = 31
a₄ = -5 + (4 - 1) * 18 = -5 + 54 = 49
The range is all the y-coordinates, so the answer would be B.
