An1 = 3n^2 -7 = 3(1)^2 -7 = 3(1)-7 = -4
an2 = 3n^2 -7 = 3(2)^2 -7 = 3(4)-7 = 5
an3 = 3n^2 -7 = 3(3)^2 -7 = 3(9)-7 = 20
an4 = 3n^2 -7 = 3(4)^2 -7 = 3(16)-7 = 41
45 Degrees on each side means it is equal, for an "equilateral" triangle.
The length of a in the triangle to the nearest tenth is 8.1 units.
<h3>How to find side of a triangle?</h3>
The side a of the triangle can be found using cosine formula.
Therefore,
a²= b² + c² - 2bc cos A
a² = 10² + 12² - 2 × 10 × 12 cos 42°
a² = 100 + 144 - 240cos 42
a² = 244 - 178.354758115
a = √65.6453
a = 8.10217871933
a = 8.1
learn more on triangle here: brainly.com/question/7831188
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Secθ = cos^(-1)θ is the same as secθ = 1/cosθ
<span>Secant is a trigonometric function, reciprocal to the cosine
</span>
Answer:
B x<-8
Step-by-step explanation:
-2x -3> 13
-2x > 13+3
-2x >16
since you will divide both side by a negative number, the operator will change from > to <
-2x /-2 < 16/-2
x<-8
