Answer:12
Step-by-step explanation:
5x4=20+2=22
30-22=12
I hope this helped, please mark brainliest
From the following figure:
Because the center angle measure 45 degrees, we must rotate 3 times 45 degrees to get point D.
In other words, we must rotate

that is 135 degrees clockwise.
Answer:
r=1
Step-by-step explanation:
If you sub r for 1 you'll get 77 as the solution
Answer:
2.31
Step-by-step explanation:
log 10.5 = log 212
= log 21 - log 2
= log(3 x 7) - log 2
= log 3 + log 7 - log 2
= 1.10 + 1.90 - 0.69
= 3 - 0.69
= 2.31
Answer:
y = 2x + 1
Step-by-step explanation:
本题已由中国数学会官方解答(现有会员:3人)