Answer:
-4x² + 10x + 4
Step-by-step explanation:
(-4x² + 3x - 5) - (-7x - 9)
-4x² + (3x - -7x) + (-5 - -9)
-4x² + (3x + 7x) + (-5 + 9)
-4x² + 10x + 4
To subtract – 7x – 9 from - 4x² + 3x – 5, we change the signs of all the terms in the second expression and then combine like terms. The final answer is -4x² + 10x + 4.
To subtract – 7x – 9 from - 4x² + 3x – 5, you simply replace the minus sign before the second expression (– 7x – 9) with a plus sign, and then change the signs of all the terms in that expression. This is analogous to the subtraction of scalars, where for example, 5–2 equals 5+(-2).
Thus, the expression becomes: -4x² + 3x - 5 + 7x + 9. Now, you simply combine like terms. The 3x and 7x can be combined to get 10x, and -5 and 9 can be combined to get 4. The final answer is -4x² + 10x + 4.
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Answer:
195
Step-by-step explanation:
So basically 3/4 of 300 is 225 and subtract that by 30 which equals 195
The equation reflecting the number of pages Giles read last week is x + 30 = 225, where x stands for the number of pages Giles read last week.
The problem you have mentioned is a typical algebraic problem that involves fractions and equation solving. If Giles is planning to read 30 pages tomorrow and be 3/4 of the way through the book, this means he will have read 300 * 3/4 = 225 pages total by then. As per the question, let's represent the number of pages Giles read last week as x. Therefore, we can set up the equation: x + 30 = 225. This equation expresses the total pages he will have read (225) as the sum of the pages that he will read tomorrow (30) and the unknown number of pages (x) he read last week.
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