2. how many solutions does this system have?
2x + y = 3
6x = 9 - 3y
oone
o none
o infinite
o two

Given (1+cosx)/(sinx) + (sinx)/(1+cosx) =4, find a numerical value of one trigonometric function of x. a. tanx=2 b. sinx=2 c. tanx=1/2 d. sinx=1/2

Some boys and girls were asked if they had a pet. one third of the group were boys. there were 20 boys. 20% of the girls had a pet. boys with a pet : girls with a pet = 1 : 5 i need to know how many girls there are.

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.