There's a fixed difference of 6 between terms (9 - 3 = 6, 15 - 9 = 6, and so on). The first term of the sequence is 3, so the 
-th term is
If there are 24 terms in the sum, then the last term is 6×23 - 3 = 135.
Let 
be the sum,
Reverse the order of terms:
If we add up the terms in the same positions, we get twice on the left side, while on the right side we observe that each pair of terms will sum to 138.
and since there are 24 terms in the sum, the right side is the sum of 24 copies of 138. In other words,
and solving for gives
Answer:
Na+ and Cl- should be examples of an ion.
<Hope I answered your question>
Answer:
5x < 30
Step-by-step explanation:
coaches = 2x
parents = 3x
total time = under 30 mins
2x + 3x < 30
5x < 30
x < 6
Answer:
The measure of angle x is 40°
Step-by-step explanation:
we know that
The measurement of the outer angle is the semi-difference of the arcs which comprises
see the attached figure with letters to better understand the problem
so
m∠x=(1/2)[arc AB-arc AC]
<u><em>Find the measure of arc AC</em></u>
we know that
arc AB+arc BC+arc AC=360° ----> by complete circle
substitute the given values
arc AB=200°
arc BC=40°
arc AC=?
200°+40°+arc AC=360°
240°+arc AC=360°
arc AC=360°-240°=120°
<u><em>Find the measure of angle x</em></u>
m∠x=(1/2)[200°-120°]=40°
Answer: Around 68.0858 m
Step-by-step explanation:
- Set the height of 37°-53°-90° triangle as x
- Set the height of 50°-40°-90° triangle as y
- The horizontal side both triangles share = 35
To find x To find y
To find the height of the building, add the x-value and y-value:
<em>I hope this is correct o_o</em>
