Please help its due soon ill give brainlest

Write a function for a rotation 90 degrees counter clockwise about the origin, point 0

Do more republicans (group a) than democrats (group b) favor a bill to make it easier for someone to own a firearm? two hundred republicans and two hundred democrats were asked if they favored a bill that made it easier for someone to own a firearm. how would we write the alternative hypothesis?

Solve the system of equations using the substitution method. {y=−3x+7x=−2y−16 enter your answers in the boxes.