1. combining like terms you should get: -5x^4+5x^3-4x^2+17x-1
2. again combine all like terms to get: 15x^4+x^3+2x^2+15x+1
3. 5x^9+3x^8-x^7+16x^6+10x^5+x^4-5x^3+33x^2-16x
Answer:
A.5y
Step-by-step explanation:
5y = 5 x y
y= 3
5 x 3 = 15
=A.5y
Answer:
3
Step-by-step explanation:
Use the Pythagorean Theorem.
=+
1369=+100
-100 -100
1269=
=
3=x
Answer:
∠ S = 151°
Step-by-step explanation:
The sum of the interior angles of a polygon is
sum = 180° ( n - 2) ← n is the number of sides
Here n = 5, thus
sum = 180° × 3 = 540
Sum the interior angles and equate to 540
10x - 3 + 5x + 2 + 7x - 11 + 13x - 31 + 8x - 19 = 540, that is
43x - 62 = 540 ( add 62 to both sides )
43x = 602 ( divide both sides by 43 )
x = 14
Thus
∠ S = 13x - 31 = 13(14) - 31 = 182 - 31 = 151°