12%=(3+10%*x)/(20+x)
x=30
add 30 pounds of the second alloy
37.5
9/24=0.375
Move the decimal two places and you get 37.5%
The diameter is twice as big as the radius
Answer:
-3
Step-by-step explanation:
-7x + 4x = 9
-3x = 9
x = 9/(-3)
<h3>
x = -3</h3>
<h2>
MARK ME AS BRAINLIST </h2>