we know that 7*7=49 so thus
therefor n=2
it is written as
Step-by-step explanation:
Combing like terms means that you combine the terms that are alike. So, if you have integers you would combine the integers. If you had a variable like x, you would combine everything with x. For instance, 2x+4+3+7x, to combine like terms add 4+3 and 2x+7x.
By Cosine Rule:
CosT = (s² + r² - t²) /(2sr)
<span>CosT = (10² + 11² - 7²) /(2*11*10)
</span>
<span>CosT = 172 /220 </span>≈ 0.7818
T = Cos⁻¹(0.7818)
T ≈ 38.57°
T ≈ 38.6°