<span>3a+4x=29 (1st)
2a-3x=-9 (2nd)
multiply (1st) by 3 and (2nd) by 4
</span>9a + 12x = 87 (1st)
8a - 12x = -36 (2nd)
---------------------add
17a = 51
a = 3
<span>2a-3x=-9
</span><span>2(3)-3x=-9
6 - 3x = -9
-3x = -15
x = 5
answer
x = 5 and a = 3</span>
Surface Area =<span> (2 • <span>π <span>• r²) + (2 • <span>π <span>• r • height)
</span></span></span></span></span>
Surface Area =<span> (2 * PI * 6^2) + (2 * PI * 6 * 12)
</span>
<span>Surface Area =<span> (72 * PI) + (144 * PI)
</span></span>
<span><span>Surface Area = </span>216 * PI
</span>
<span><span><span><span>Surface Area = </span>678.584
</span>
</span>
</span>
8
46
is equivalent to 4
23
because 4 x 2 = 8 and 23 x 2 = 46
12
69
is equivalent to 4
23
because 4 x 3 = 12 and 23 x 3 = 69
16
92
is equivalent to 4
23
because 4 x 4 = 16 and 23 x 4 = 92
Three hundred and seventeen.