Step-by-step explanation:
y = (x-1)(2x-1)
= x(2x-1) -1(2x-1)
= 2x^2 - x - 2x + 1
= 2x^2 - 3x + 1
Answer:
Graph 3.
Step-by-step explanation:
Since they need to earn $240 by selling $3 candy bars, they must sell at least 80 candy bars since 240/3 = 80.
With this in mind, selling more than 80 candy bars would be acceptable, but selling less would not which is why the third graph is correct.
Answer:
c
Step-by-step explanation:
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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