Answer:
30 pounds
Step-by-step explanation:
Amount of tin in first alloy + amount of tin in second alloy = amount of tin in mixture
0.15 (20) + 0.10 x = 0.12 (20 + x)
3 + 0.10 x = 2.4 + 0.12 x
0.6 = 0.02 x
x = 30
4*3*2*1
24 three-digit numbers can be formed
Answer:11
Step-by-step explanation:
The first one I THINK is 21 and the second one I THINK is 20. I'm not sure though sorry if I'm wrong
It's easy to find the trinomial. Just multiply (4x + 5) and (3x - 7) together.

So the final answer is

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