Answer:
242
Step-by-step explanation:
Here, we want to calculate t15 + t25
Mathematically, nth term is
a + (n-1)d
here, a = 26 and d = 31-26 = 5
t15 = 26 + (15-1)5
t15 = 26 + 70
t15 = 96
t25 = 26 + (25-1)5
t25 = 26 + 120
t25 = 146
t15 + t25 = 96 + 146 = 242
Step-by-step explanation:
1-(2x+4)= 1-2x-4= -2x-3
11. 18=10+x
x=8
8/4= 2 hours (because there are 8,15 min periods, 4,15 min per 1 hour)
12. 1.44 x 10⁸
13. 2 x 10¹²
IDK the answer I would say turn the 4.1 into a fraction of tenths then calculate.