2x² +8y = 121.5
<span>8y = 121.5 - 2x</span>²
and,
<span>x</span>²<span>-8y = 121.5 </span>
<span>-8y = 121.5 -x</span>²
<span>8y = x</span>²<span>-121.5 </span>
<span>Now, equate the two 8y's </span>
<span>121.5-2x</span>²<span> = x</span>²<span> -121.5 </span>
<span>-3x</span>²<span> = -121.5-121.5 </span>
<span>-3x</span>²<span> = -243 </span>
<span>3x</span>²<span> = 243 </span>
<span>x</span>²<span> = 81 </span>
<span>x = ±9</span>
Answer:
Don't delete mistystar
Step-by-step explanation:
60-20-4x+8x
is equivalent:
60-20-4x+8x=40+4x
simplify
40+4x=40+4x
0=0
Answer: wheres the picture??????
Step-by-step explanation:
Answer:
<BOD
Step-by-step explanation:
Supplementary angles add up to 180, but remember that a 180 degree angle is also just a straight line! <AOB takes up half of Line AD, while we can see that <BOD takes up the other half of the line.