26 - 2b > 2(3b + 4) |use distributive property: a(b + c) = ab + ac
26 - 2b > 6b + 8 |subtract 26 from both sides
-2b > 6b - 18 |subtract 6b from both sides
-8b > -18 |change signs
8b < 18 |divide borh sides by 8
b < 18/8
b < 9/4
b < 2.25
Step-by-step explanation:
Use the angle difference formula for cosine.
cos(α − β) = cos α cos β + sin α sin β
cos(180° − θ) = cos 180° cos θ + sin 180° sin θ
cos(180° − θ) = (-1) cos θ + (0) sin θ
cos(180° − θ) = -cos θ
Answer and working out. Hope it helps
Answer:
A u B = {3,5,6,7,8,11,12}
Step-by-step explanation:
A = {3,6,7,11}
B = {3,5,7,8,12}
A u B = {3,5,6,7,8,11,12}
1.3
a triangle has three sides, divide four by three to get one point three
