If isosceles triangle ABC has a 130° angle at vertex B, which statement must be true? A) m∠A = 15° and m∠C = 35°
B) m∠A + m∠B = 155°
D) m∠A + m∠C = 60°
C)m∠A = 20° and m∠C = 30°

Factorize: x^2+8x+10 i just solved it but i don't know if the process is correct

Noor brought 21 sheets of stickers. she gave 1/3 of a sheet to each of the 45 students at recess. she wants to give teachers 1 1/2 sheets each.

In each of the cases that follow, the magnitude of a vector is given along with the counterclockwise angle it makes with the +x axis. use trigonometry to find the x and y components of the vector. also, sketch each vector approximately to scale to see if your calculated answers seem reasonable. (a) 50.0 n at 60.0°, (b) 75 m/ s at 5π/ 6 rad, (c) 254 lb at 325°, (d) 69 km at 1.1π rad.