When simplified all of them equal 3/1. They are asking you to just chose 4 of them. Hope that helps!
a- is -28 and i’m working out the rest for you now
Answer:
the second one(20)
Step-by-step explanation:
If you pretend 20 is x, you solve the equation by pluging in x (20) into the equation and it gives you 70, 70 is what the big part is and 70+20 is 90, which is the size of a 90degree side.
4(20)-10
80-10
70
70+20=90
