Triangle DEF has coordinates of (1, 1), E(1, 5) and F(5,1). Triangle D'E'F is the image of ∆DEF by a dilation with center (0,0) and a scale factor of 7. What is D'F? How Do I solve this problem?

Aplane flies around trip to philadelphia it flies to philadelphia at 220 miles per hour and back home with a tailwind at 280 miles per hour if the total trip takes 6.5 hours how many miles does the plane fly round trip

Which of these triangle pairs can be mapped to each other using two reflections?

Write each of the following numerals in base 10. for base twelve, t and e represent the face values ten and eleven, respectively. 114 base 5 89t base 12