Answer: 29 cows
Step-by-step explanation:
First we need to know how many pieces of meat will be needed. But before that, we need to know how many hours are in these 30 days. 24 hours per day so, 30*24=720 hours. 720 hours and 4 pieces of meat per 10 of those hours. We can do 720/10=72, then, 72*4=288. That means we need 288 pieces of meat, if each cow gives you ten, then we can round 288 to the nearest ten which is 290, then, 290/10 is 29. This means that Dumbledore needs 29 whole cows.
<em>(Yer a wizard Harry)</em>
(54/100)*x = 81 => x = 8100/54=> x = 150;
I'm not really sure but I believe the answer is true because of the way they stated the coefficient p.
Expression is equivalent to the given expression 13x−29xthat could be simplified by just substracting it13x − 29x = -16x but it is not in the choices
13x − 29xfactor out, so it will be the same with choice
x(13 - 29)
