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8 1/3% chance (1/12)

Step-by-step explanation:

There are 24 possible rolls (4 shapes * 6 numbers). The heart has 6 numbers, so we are already at 25% chance of getting a heart. Here, it's asking for 4 or 6, so since that's 1/3 of the numbers, multiply 1/3 by 1/4 for 1/12 or 8 1/3% chance.

my guess would be b and d, but i didn’t actually get out the pen and paper. lol

(5x-1)^2= (5x)^2-2(5x)×1+(1)^2=25x^2-10x+1