2.3+0.23 = 2.53
2.53+0.023 = 2.553
The correct answer is: [D]: " x² – 5x – 24 " .
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Explanation:
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Given: " (x + 3)(x – 8) " ; expand :
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Note: (a + b) (c + d) = ac + ad + bc + bd .
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a = x ;
b = 3 ;
c = x
d = 8
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" (x + 3)(x – 8) " ;
= (x * x) + ( -8 * x) + ( 3 * x ) + (3 * -8) ;
= x² + (-8x) + 3x + (-24) ;
= x² – 8x + 3x – 24 ;
→ Combine the "like terms" :
– 8x + 3x = – 5x ;
And simplify the expression;
to get:
→ " x² – 5x – 24 " ; which is: Answer choice: [D]: " x² – 5x – 24 " .
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Number machines=100=10² machines.
number pages/1 machine=10⁴ pages/ machine.
number pages that can print 100 machines in a day=
=10² machines * 10⁴ pages/ machines=10²⁺⁴ pages=10⁶ pages/day.
necessary days to print 10⁶ pages=number pages/ number pages that can print 100 machines in a day.
necessarry days to print 10⁶ pages=10⁶ pages / 10 ⁶ pages/day=10⁶⁻⁶ days=
=10⁰ days=1 day.
1 day for print 10⁶ pages, whith 100 machines.
