If you don't know these, these are called the diamond problems. there are two numbers on each side, and in the bottom box, it is the sum of adding them together, and in the top box, it is the sum of multiplying together. i have no idea about #'s, a, b, and f, can you guys me? !

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step-by-step explanation:

0.84 dang lotta people are looking for this lol or if you round up its 1 but the overall answer to that is 0.84

step-by-step explanation:

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.