Find the difference between consecutive terms. If all of them in the sequence have the same difference, then it's an arithmetic sequence. The fourth answer, for example, is not an arithmetic sequence. The difference of 14 and 4 is 10 since 14-4=10. The difference of 24 and 14 is also 10. But the difference between 32 and 24 is 8. Since 8 isn't the same as the other differences, it's not an arithmetic sequence. That should be enough for you to determine which of the remaining sequences is arithmetic.
Answer:
CD with the line bar over it ↔
DC with the line bar over it ↔
Step-by-step explanation:
There are two possible names for the line
CD with the line bar over it ↔
DC with the line bar over it ↔
We need the line bar over it to indicate it is a line and not a line segment. A line goes on infinitely in both directions while a line segment stops
X=21<span>°
</span>y=31.5<span>°
Explanation:
Since it is a whole circle (360</span>°) and there are 40 section (90<span>° each).
2 of the 90</span>° +(180°)<span>are clearly stated there so you do:
360</span>°-180°=180<span>°
</span>
1. On the side that have 2 'y's you do:
90°-(12+15)=63
Then 63/2=31.5<span>°
</span>Therefore y=31.5<span>°
</span>
2. On the side with 3 'x's you do:
90<span>°-(12+15)=63
Then 63/3=21</span><span>°
</span>Therefore x=21<span>°
To cross check you do:
90+90+15+12+21+21+21+15+12+31.5+31.5=360
I hope you find this helpful.</span>
Problem 10
You are correct. You divide 360 over the exterior angle measure to get 360/72 = 5
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Problem 11
x = 33 is correct as this angle is an alternate interior angle pair with the 33 degree angle up top
y = 38 is correct since y+33+109 = 180 solves to y = 38. In other words: 38+33+109 = 180
z = 109 is correct. The opposite angles of a parallelogram are congruent
I think a would be the correct answer
