Solve the system: {-2(a-b)+16=3(b+7), 6a-(a-5)=-8-(b+1)

There are 12 boy and13 girls in a class. if the teacher randomly chooses a student’s name out of a hat what is the probability it will be a girl

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)

Find the value of x. round the length to the nearest tenth