Answer:
He was faster the second time around.
Step-by-step explanation:
Since 1/10 is more than 1/12, he spent less time the second time than he did the first, meaning that he typed faster in the second attempt than the first.
The answer to the question is 378bd
Answer:
i think 3/4
Step-by-step explanation:
Answer:
28 pizzas can be bought
Step-by-step explanation:
you have to find the unit rate of the pizzas.
so 135 divided by 15 which is 9
and then you divide 252 by 9
Quadratic formula is derived from completing the square:
<span>ax² + bx + c = 0 </span>
<span>ax² + bx = −c </span>
<span>x² + b/a x = −c/a </span>
<span>Complete square on left side by adding (b/(2a))² to both sides: </span>
<span>x² + b/a x + (b/(2a))² = (b/(2a))² − c/a </span>
<span>(x + b/(2a))² = (b²−4ac)/(2a)² </span>
<span>x + b/(2a) = ± √(b²−4ac)/(2a) </span>
<span>x = −b/(2a) ± √(b²−4ac)/(2a) </span>
<span>x = (−b ± √(b²−4ac)) / (2a) </span>
<span>- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - </span>
<span>or </span>
<span>ax² + bx + c = 0 </span>
<span>ax² + bx = −c </span>
<span>4a (ax² + bx) = −4ac </span>
<span>4a²x² + 4abx = −4ac </span>
<span>Complete the square on left side by adding b² to both sides </span>
<span>4a²x² + 4abx + b² = b²−4ac </span>
<span>(2ax + b)² = b²−4ac </span>
<span>2ax + b = ± √(b²−4ac) </span>
<span>2ax = −b ± √(b²−4ac) </span>
<span>x = (−b ± √(b²−4ac)) / (2a)</span>