Answer: The correct option is (A). When the radicand is negative
Step-by-step explanation: We are given to select the correct option by which we can tell that a quadratic equation has no real solutions.
We know that for the quadratic equation
the radicand is given by
Based on the radicand "D", we have the following rules:
(i) If D > 0 (positive), then the two solutions are real and unequal.
(ii) If D = 0, then the two solutions are equal.
(iii) If D< 0 (negative), then the two solutions are complex (not real).
Thus, when the radicand is negative, then the quadratic equation has no real solutions.
Option (A) is correct.
Helen needs a replacement ball bearing whose radius is 5.99mm
A sphere is a perfectly round geometrical 3-dimensional object. It can be characterized as the set of all points located distance r (radius) away from a given point (center). It is perfectly symmetrical, and has no edges or vertices.
The formula of surface area of the sphere is 
where r represents radius
Given: Surface area of ball = 452.16
Using formula we get,
= 452.16
r^2 = 452.16/4
r = 5.99 mm
Thus Helen needs a replacement ball bearing whose radius is 5.99mm
Learn more about Surface area here :
brainly.com/question/2835293
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Answer:
29.51%
Step-by-step explanation:
The change from 305 to 395 is the difference between the two numbers. So, it would be 395 - 305 or 90. Now, to find the percentage of change, we need to find what part of the original amount is the change. In other words, we would have to divide 90 by 305. By putting this in a calculator you get about 0.2951. To convert this decimal into a percent, we would multiply by 100 giving us 29.51%.
Answer:
4 2/3 divided by 7. You can do 14/3 by making it an improper fraction. Then you can do 14/3 divided by 7/1.
(LCR) 14/3 * 1/7 = 14/21.
Simplify by 7.
14 divided by 7 is 2.
21 divided by 7 is 3.
The answer is 2/3!
No, she is NOT correct because for example, if 20 is multiplied by 4/5 then it first has to be multiplied by 4 then divided by 5 (even though you can use cross multiplying) EX: 20×4=80/5=16
