Point B(-8,5) is dilated from the origin by scale factor r=1/2 what are the coordinates of point B?

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

The length of a shadow of the building is 36m. the length of the pole, which is perpendicular to the ground, is 1.9m. the length of the pole's shadow is 1.52m. what is the height of the building?

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4