Asked by Anonymous

find r from the formula e= ir when e= 20 and i = 4
Answered by rebekah
plug in the numbers

so

20=4r

then divide by 4

20/4

so 5=r
Answered by Ms. Sue
e= ir

20 = 4r

20/4 = r
5 = r

Substitute 5 for r to prove this equation.

20 = 4 * 5
20 = 20

Right.