Answer:
9
Step-by-step explanation:
3x + 3 = 30
-3 -3
3x = 27
/3 /3
x= 9
40 = 0.5r
40/0.5 = r
80 = r
just divide the number in front of the r so that you can figure it out
Answer:difference of two squares will be
16y^2 -x^2 = (4y -x)(4y +x)
so the second choice
Step-by-step explanation:
