First, find out x
x+15+2x+15=180
3x+30=180
3x=150
x=50
so the two angels are x+15=65(let's name is ∠5 for convenience), and ∠6= 2x+15=115
notice the two inner lines are marked as congruent, so
∠4=∠5=65
∠1=180-∠4-∠5=180-65-65=50
Name the right bottom angle ∠7, ∠3=∠7 and ∠3+∠7=the exterior angle 100 degree, therefore, ∠3=50
∠2+∠3=∠4, therefore, ∠2=∠4-∠3=65-50=15
∠1=50, ∠2=15, ∠3=50, ∠4=65
B)1,131.20 would be the answer. 1010x0.14=141.4x8=B
Volume of a cone = [(pi)r^2(h)]:3 = [3.14 (25m^2)(12m)]:3 = 314in^3.
= 8 21/40
= 8 + 21/40
= 8/1 + 21/40
= (8/1 * 40/40) + 21/40
= 320/40 + 21/40
= 341/40
= 341 ÷ 40
= 8.525
178.50 = 11.90y + 10.50x ⇒ equation in standard form.
