Is abc with vertices a(-2 -5) b(2, 0) and c(-1, -4) a right triangle?

abc is a right triangle because ab | bc
abc is a right triangle because bc | ac
abc is a right triangle because ab | ac
abc is not a right triangle

Dylan and dusty plan to take weekly surfing lessons together. if the 2-hour lessons are $20 per person and they plan to spend $100 each on new surfboards, what is the maximum number of lessons the two can take if the total amount spent for lessons and surfboards is at most $480?

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

Write the fraction or mixed number and the decimal shown by the model