Answer:
step 1. Halve everything
x^2+ 4x - 0.5 = 0
step 2. Halve the coefficient of x so you can write down an equivalent for x² + 4 (that is, (x + 2)^2 - 4 )
(x + 2)² - 4.5 = 0
step 3. Isolate the squared term:
(x + 2)^2 = 4.5
step 4. Take square roots of both sides, recognising that a square root can be positive or negative:
x + 2 = ±√4.5
step 5. Make x explicitly
x = -2 ±√4.5
And there you are with two solutions.
Step-by-step explanation:
hope this helps if not let me know have a great day
Answer:
Step-by-step explanation:
Please see the attached picture.
Let's find the value of the opposite side, XZ.
Applying Pythagoras' Theorem,
(XZ)² +(XY)²= (ZY)²
(XZ)² +16²= 65²
(XZ)²= 4225 -256 <em>(</em><em>bring</em><em> </em><em>constant</em><em> </em><em>to</em><em> </em><em>1</em><em> </em><em>side</em><em>)</em>
(XZ)²= 3969 <em>(</em><em>simplify</em><em>)</em>
<em>Square</em><em> </em><em>root</em><em> </em><em>both</em><em> </em><em>sides</em><em>,</em>
XZ= 
XZ= 63 <em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em>(simplify)</em>
sinY
= XZ/ ZY
<span>If 5y*2=80 then y is equal to 8</span>
C. Phonograph were inferior in sound quality.
Step-by-step explanation:
Researches have shown that plants respond to the sounds of their pollinator.
Some plants begin to produce a greater amount of nectar and some begin to vibrate to attract the attention of the pollinators towards them.
Greater the intensity of the sound of the pollinator, the faster the reaction will be.
Phonographs have a sound of lower intensity when compared to the intensity of sound produced by the radio.
Thus the radio was better than the phonograph in encouraging the concept of cross-pollination.
