Answer:
144
Step-by-step explanation:
Sum of interior angles:
180(n-2)
180(10-2)
1440
Measure of each interior angle:
1440/10=144
4(2x + 10)=0
8x + 40 = 0
8x = -40
x = -5
Answer:
<h2>x = 3</h2>
Step-by-step explanation:
Look at the picture.
Therefore we have:
<em>cross multiply</em>

<em>divide both sides by 3</em>

m∠R = 27.03°
Solution:
Given In ΔQRP, p = 28 km, q = 17 km, r = 15 km
To find the measure of angle R:
Law of cosine formula for ΔQRP:

Substitute the given values in the above formula.



Switch the given equation.

Subtract 1073 from both side of the equation.

Divide by –952 on both sides.



Hence m∠R = 27.03°.
Say this: "after x=2, g(x) exceeds f(x). Note that for x=3, g(3) > f(3). Check that out.