Cho tam giác ABCD có phân giác trong của góc A và góc B cắt nhau tại E sao cho DE=DA: chứng minh a) các tam giác ABC và EDC bằng nhau
b) AC là phân giác góc A

What is the lcm of 16 and 40 ? 24 and 40 ?

Aaron invested a total of $4,100, some in an account earning 8% simple interest, and the rest in an account earning 5% simple interest. how much did he invest in each account if after one year he earned $211 in interest? select one: a. $200 at 8%, $3,900 at 5% b. $3,200 at 8%, $900 at 5% c. $900 at 8%, $3,200 at 5% d. $3,900 at 8%, $200 at 5%

Bobs burgers bam has a special deal of 4 hamburgers for $6. at that rate, how much should it cost to buy 3 hamburgers?