Answer + Explanation:
<h3>16.</h3>
sum of opposite two angles = one exterior angle
50° + 20° = d
d = 70°
<h3>17.</h3>
A straight line has total 180° angle.
a + d = 180°
90° + d = 180°
d = 180° - 90°
d = 90°
<h3>18.</h3>
sum of opposite two angles = one exterior angle
52° + 78° = d
d = 130°
<h3>19/20.</h3>
If a = 90° then d = 90°
Then b = 90 - c and c = 90 - b
<h3>21.</h3>
If d = 105°, then c = 105 - b
<span>0 = x² + 10x + 16
Subtract </span><span>x^2+10x+16 from each side
</span><span>0−<span>(<span><span>x^2+10x</span>+16</span>) </span></span>= x^2+10x+16−(<span>x^2+10x+16</span>)
<span><span>−x^2−10x</span>−16</span>=<span>0
</span>
Factor left side
<span><span>(<span>−x−2</span>)</span><span>(x+8)</span></span>=<span>0
</span>
Set all factors to equal 0
<span><span><span>−x</span>−2</span>=<span><span><span>0<span> or </span></span>x</span>+8</span></span>=<span>0
</span>
The solutions are x = -2 and x = -8
Answer:
73-2=71
so 71 is the correct answer
Answer:
There are 12 quarters, 36 nickels and 32 dimes.
Step-by-step explanation:
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but i think i'm starting to catch feelings for you.