Amara needs 4 5 kilograms of meat to feed her 2 pet dragons each day. Each pet dragon eats the same amount of meat. How many kil
2 answers:
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Answer:
x = -19 or x = -1
Step-by-step explanation:
We need the quadratic equation in the form
,
so we add 8 to both sides.
Now we have an equation of the form x^2 + ax + b = 0.
We need to factor the quadratic equation. To factor it, we need two numbers, p and q, whose product is b and whose sum is a. Then the factoring is (x + p)(x + q).
In our case, b = 19 and a = 20. We need two numbers that multiply to 19 and add to 20. The numbers are 19 and 1. Our p and q are 19 and 1.
(x + 19)(x + 1) = 0
Since a product of two factors equals zero, either one factor equals zero, or the other factor equals zero. We set each factor equal to zero and solve both equations for x.
x + 19 = 0 or x + 1 = 0
x = -19 or x = -1
Answer:
The correct answer is 0.125.
Step-by-step explanation:
Anne has 8 unmarked computer disks in a box, namely one of English, Spanish, Mathematics, computer science, biology, SAT preparation, college applications, and American history.
Let the experiment be to pick up the SAT preparation disk from this set of 8 disk
Possible outcome is only one as there is only one SAT preparation disk.
Total number of outcomes, i.e. total number of disks available is 8.
Probability of picking of SAT preparation disk is
Probability = =
.