Discriminant of a quadratic equation can be calculated as:
Discriminant = b² - 4ac
b = coefficient of x term = 2
a = coefficient of squared term = 1
c = constant = 7
So,
Discriminant = 4 - 4(1)(7) = -24
So, the correct answer to this question is option C
Answer:
Option A) Combined, with a saving of x-y cents
Step-by-step explanation:
We are given the following in the question:
The rate to mail a package is x cents for first pound and y cents for each additional pound.

Weights of packages =
3 pounds and 5 pounds
Cost of combined package:
Total weight = 8 pounds

Cost of sending separately:

Difference between cost of sending the packages separately and combined

Thus, sending the packages combined is a cheaper method with a saving of (x-y) cents
Thus, the correct answer is:
Option A) Combined, with a saving of (x-y) cents
Answer:
0.3 cups
Step-by-step explanation:
divide 6 by 20
Answer:
2.25
Step-by-step explanation: Replace the z with the value given (-18) and then multiply that by 1.1 you can then add it to 21.3 and then do the exponent
10:6
blue paint= 10
red paint= 6
ratio is blue:red
therefore, the answer is 10:6