Use scientific notation to estimate the number of inches in 1,225 miles. Include all calculations in your final answer. 1 inch ≈ 1.578 × 10 -5 miles.

Solve the x in the equation x^2+14x+17=-96

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*