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
It is A because it can’t be B and it can’t be C and it can’t be D so my answer is A
i m not sure about the answer ...
There are no irrational numbers because all these fractions come to a stop