Answer:
37
Step-by-step explanation:
Let's use the rule GEMDAS (Grouping, Exponents, Multiply, Divide, Add, Subtract) from left to right. Therefore, we will simplify the equation in the parentheses. 
. -(-7) creates a double negative, deeming the 7 positive, because when there is two negatives the number will turn into a positive. 
= 49, -3 x 4= -12. Therefore the final form of the equation will be 49 - 12 = 37.
Let me know if there are mistakes.
Answer:
1.) ???
2.) (2x+3y)(2x-3y)=4x²-9y²
Answer: The answer is -2
Step-by-step explanation: positive and a positive is a positive, but, a positive and a negative is a negative.
Answer:
32/25
Step-by-step explanation:
Any finite-length, or repeating, decimal number is a rational number. Perhaps you want the number expressed as the ratio of two integers.
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You can start by recognizing that the value of the number is one hundred twenty-eight hundredths, or 128/100.
This improper fraction can be reduced by removing a factor of 4 from numerator and denominator:
128/100 = 32/25
