Explanation needed
What is the x-intercept of the equation:
-5x+15y=30​

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

Let hh represent the number of hummingbirds and ss represent the number of sunbirds that must pollinate the colony so it can survive until next year. 6h+4s > 746h+4s> 74 this year, 88 hummingbirds pollinated the colony. what is the least number of sunbirds that must pollinate the colony to ensure that it will survive until next year?

Can someone tell me if this is perpendicular? !