Hello :
the discriminat of each quadratic equation : ax²+bx+c=0 ....(a <span>≠ 0) is :
</span><span>Δ = b² -4ac
1 ) </span>Δ > 0 the equation has two reals solutions : x = (-b±√Δ)/2a
2 ) Δ = 0 : one solution : x = -b/2a
3 ) Δ <span>< 0 : no reals solutions
in this exercice : x² = 5-x
x² +x-5 = 0 .... a =1 b= 1 c=-5
calculate </span>Δ..................................
What is it comparing it to?
<span>2√3 = 1.26 times as large </span>
Answer:
Radius of the circle is <em>15 inches.</em>
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Step-by-step explanation:
Relation between length of arc, radius and the angle subtended by the arc on center is:
where is the central angle in radians subtended by arc
is the length of arc
is the radius of arc
We are Given the following details:
We know that
Converting to radians:
radians
Putting the values of and to find the value of
Hence, Radius of the circle is <em>15 inches.</em>
Multiple rules you have to know. Starting from the top angle.
Angle a) - Angles opposite each other equal each other
Angle b) - sum of angles in a triangle should equal 180. The right angle is 90 and you already know angle a)
Angle c) - the flat angle on a line should be equal to 180. So part of it is 65 rest is the rest of 180
Answer:
Step-by-step explanation: