5. The easiest way to determine this is to count the number of zeroes, though this only works for base 10.
The answer is 4600 I USED MENTAL MATH
Answer:
<h2><em><u>x</u></em><em><u> </u></em><em><u>=</u></em><em><u> </u></em><em><u>14</u></em></h2>
Step-by-step explanation:
7x + 9 = 9x - 19. <em>[</em><em>Corresponding</em><em> </em><em>Angles</em><em>]</em>
=> 9x - 19 = 7x + 9
=> 9x - 7x = 19 + 9
=> 2x = 28
=> <em><u>x</u></em><em><u> </u></em><em><u>=</u></em><em><u> </u></em><em><u>14</u></em><em><u> </u></em><em><u>(</u></em><em><u>Ans</u></em><em><u>)</u></em>
Answer:
c = 49/4
Step-by-step explanation:
The given expression is x^2 - 7x + c
This trinomial must be a perfect square.
Therefore, c must be a prefect square number.
So b^2 - 4ac = 0. That is discriminant must be equal to zero.
In the given expression a =1 and b = -7
Now plug in these values in the discriminant formula.
(-7)^2 - 4*1*c = 0
49 -4c = 0
4c = 49
c = 49/4
x^2 - 7x + 49/4 = (x - 7/2)^2
which is perfect square trinomial.
Thank you.
The correct answer is b.
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