Step-by-step explanation:
Sn=n/2(2a+(n-1)d)
910=n/2{2a+(n-1)d}
1820=n{2a+(n-1)d}
1820=20{2a+(20-1)d}
1820=20{2a+19d}
91=2a+19d
An=a+(n-1)d
95=a+(20-1)d
95=a+19d
91=2a+19d
---------------
4=-a
a=-4
91=2a+19d
91=2(-4)+19d
91=-8+19d
91+8=19d
99=19d
d=99/19
A=-4
I believe it would be 12 because 9 min divided by .75 a rotation gets 12 rotations
Seventy-two ten-thousandths. Try and see if this correct
C
All u have to do is add 23.5 to 23.5
Answer:
1)x=15
2)x=38
3)x=7
4)x=10
Step-by-step explanation:
