U use sin
sin50 = b/10
b=10(0.76)
b=7.6
Answer: -6377/1069 (write as fraction)
Step-by-step explanation: 6377/-1069
If you would like for me to simply it let me know!
The common difference, d, can be determined by subtracting the two consecutive values:
1 - 5 = -4
-3 - 1 = -4
-7 - -3 = -4
Then, using the equation:
an = a1+ d(n-1)
a_21 = 5 + (-4)(21 - 1)
a_21 = -75
The answer is letter D. I hope I was able to help you. Have a good day!