4b^2-4b=-1 A)0 B)1 C)2 D)3
2 answers:
Answer:
Step-by-step explanation:
Take out 4 from each term on the left.
4(B^2 - B) = -1 Divide both sides by 4
4(B^2 - B)/4 = - 1/4
(B^2 - B) = -1/4 Add 1/4 to both sides
B^2 - B + 1/4 = - 1/4+1/4
B^2 - B + 1/4 = 0
(b - 1/2)(b - 1/2)
This has 2 equal roots of (b - 1/2)(b - 1/2) or b = 1/2 , b = 1/2.
When that happens, the quadratic just touches the x axis (in this case at 1/2)
I've provided a graph to show you how this happens. None of your choices are what I'm getting. The answer is 1/2 no matter how it is factored.
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Answer:
7.25 and 10.75 Hours
Step-by-step explanation:
Total hours Nalia and Lisa worked = 18 Hours
Nalia worked 3.5 hours then Lisa which is hours
⇒
Lisa has worked for 7.25 hours
Nalia has worked for = 7.25 + 3.5 = 10.75 hours
Answer:
The measure of is 30°.
Step-by-step explanation:
In the statement, the angle has been misrepresented. The corrected statement is described below:
<em>"On a unit circle, the terminal point of </em><em> is </em>
<em>. What is </em>
<em>?"</em>
The measure of the angle (), in radians, is in standard form, that is, it is done with respect to the +x semiaxis. The measure of the angle whose terminal point is of the form
is determined by the following inverse trigonometric function:
(1)
If we know that and
, then the measure of
is:
The measure of is 30°.