Prove that: 2^13–2^10–2^9 is divisible by 13

See below.

Step-by-step ,explanation:

2^13 – 2^10 – 2^9

Take out the GCF,  2^9 :

= 2^9 (2^4 - 2 - 1)

= 2^9(16 - 3)

= 13 * 2^9.

So it must be divisible by 13.

if the probability is 1/12, 75 people will receive a $25 gift card

step-by-step explanation: