Count change of signs to tell positive roots
then replace x with -x and evaluate, then count change in sign for negative roots
initially
+, -, -, +, +, -
3 changes
3 or 1 positive roots
replacing x with -x
-,-,+,+,-,-
2 changes
2 or 0 negative roots
B is answer
Answer:
T4 = -2°F
Step-by-step explanation:
Given the following data;
Current temperature = 10°F
Constant, K = 3°F
Time, t = 4 hours
In four (4) hours, we have;
T = kt
Substituting into the equation, we have;
T = 3 * 4
T = 12°F
T4 = current temp - new temp
T4 = 10°F - 12°F
T4 = -2°F
Therefore, the temperature it will be in 4 hours is - 2°F.
Answer:
The formula is:
Step-by-step explanation:
The geometric sequences are those in which the division between the terms and of the sequence are equal to a constant common reason called "r"
The geometrics secencias have the following form:
Where is the first term of the sequence
In this sequence we have the following terms
1.2, 3, 7.5, 18.75
Then notice that:
Then:
and
Finally the formula is:
Answer:
m = 8
Step-by-step explanation:
turn it into a square and then you can divide 48 by 6 and the answer is 8
Slope or m is -2
Y intercept or b is (0,-1) or -1