Bob has 120 nails
One pound = 80 nails
Half a pound=40
80+40=120
Answer:
12.75
Step-by-step explanation:
12 3/4
Using it's concept, the probability that exactly two of the dice show a 1 and exactly two of the dice show a 2 is: 10/243.
<h3>What is a probability?</h3>
A probability is given by the <u>number of desired outcomes divided by the number of total outcomes</u>.
One of the six numbers is of 1, and also one out of six is 2. The other two trials can be any of the other 4 numbers, hence the probability for the six rolls has the following format:
p = (1/6)² x (1/6)² x (4/6)²
This considers just one order, while there are six rolls, hence there are 6! possible orders, hence the probability is:
p = 6! x (1/6)² x (1/6)² x (4/6)² = 120 x 16/46656 = 10/243.
More can be learned about probabilities at brainly.com/question/14398287
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Ax²+bx+c=0
The formula to solve for x is:
![x= \frac{-b(+/-) \sqrt{ b^{2}-4ac } }{2a}](https://tex.z-dn.net/?f=x%3D%20%5Cfrac%7B-b%28%2B%2F-%29%20%5Csqrt%7B%20b%5E%7B2%7D-4ac%20%7D%20%20%7D%7B2a%7D%20)
So for 3x²+13x+10=0, plug in the data
x=-13±√13²-4(3)(10) / 2(3)
x=-13±√169-120 / 6
x=-13±√49 /6
x=-13<span>±7 / 6
x=-13+7/6
x=-6/6
x=-1x=-13-7/ 6
x=-20/6 or 3.3repeating
3x</span>²+14x+15=0
x=-14±√14²-4(3)(15) / 2(3)
x=-14±√196-180 /6
x=-14<span>±</span>√16 / 6
x=-14+4/6
x=-10/6 or 1.6repeatingx=-14-4/6
x=-18/6
x=-3