A^2 - b^2 = (a-b)(a+b)
To test it, expand the right hand side.
8.5x-6.1=-7.1
40x-6.1=-7.1
40x=-7.1+6.1
40x=-1
solution= x= -0.025
The answer would be 0.15 because in a deck there are only 4 cards of 8 (diamonds, hearts, clovers, and spades). Since there are 52 cards, you would divide 8 by 52 to get 0.153846, but since it says to round to the nearest hundredths, the answer would be 0.15.
Answer:

Step-by-step explanation:

Distribute -3 through the parentheses
Similarly, Distribute 4 through the parentheses
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Collect like terms
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Calculate
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Move 33 to right hand side and change it's sign
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Calculate
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Hope I helped!
Best regards!!