14 + 28 + 42 + 56 + … 280
= 14 (1 + 2 + 3 + 4 + … + 20)
= 14 × 20 × 21 / 2
= 2940
where we use the well-known identity,

Theres an app called photomath that could easily solve problems like this
Divide 100 to 56 = 56/100= 0.56 then you wanna times it by 50 so then it would be.56x50=28
Answer:
The answer is 28/5
Step-by-step explanation:
5.6 can be written as 56/10 into vulgar fraction.
Thus, The answer is 56/10 = 28/5
<u>-TheUnknownScientist 72</u>
Since complements of the same angle are congruent, we know that both angles are congruent, meaning they have the same measure. To find the value of X, set the two angles equal to each other and solve