The area, a, of a trapezoid is calculated using the formula a=1/2(b+c) how do i get b alone

A=1/2(b+c)

x2       x2    times by 2

2A  = b + c  

- c       -c     subtract c

2A - c = b

your answer is the frist one

hop i

irrational, then, just means all the numbers that aren't rational. every integer is a rational number, since each integer n can be written in the form n/1. however, numbers like 1/2, 45454737/2424242, and -3/7 are also rational, since they are fractions whose numerator and denominator are integers.

step-by-step explanation: