
Now find equation of the graph. It passes through the point (2,3), and intersects y-axis at -2.
90 cookies will be needed for 30 students
85+92+84+71+94+x /6>86
Multiply both sides by 6
426+x>516
Subtract 426 from both sides
X>90
X^2+15^2=25^2
X^2+225=625
Isolate X
X^2=400
Take the square root on both sides
X=positive and negative 20 but in this case the negative is thrown out because you can't have a negative side
Answer: 20