Answer:

<h3>4th answer is correct</h3>
Step-by-step explanation:


Answer:
Step-by-step explanation:
Ke = 1/2mv^2
Ke= .5x500kgx(12m/s)^2
Ke = 36,000 J
Step-by-step explanation:

so A = 64a +45
(
so B = 108 +a
2A-B=0--> 2(64a+45)-108-a=0--> a =18/127
Sorry if i am wrong but it's 40