Someone sells a product for 10 cents and he sells 1000 products, how much money did he earn

Part a : solve -vp + 40 < 65 for v part b : solve 7w - 3r = 15 for r show your work .

Find dy/dx using implicit differentiation ln(20+e^xy)=y

1) what is the measure of the exterior angle, ∠uvw ? 2) in triangle man, what is the measure of the exterior angle at n (in degrees)?