PLEASE HELP! URGENT! (3 images below) △A' B' C' is the image of △ABC triangle under a dilation whose center is A and scale factor is 3/4. Which figure correctly shows △A′ B′ C' using the solid line?

Can any one me with the answers to these questions asap?

At oaknoll school, 90 out of 270 students on computers. what percent of students at oak knoll school do not own computers? round the nearest tenth of a percent.

Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.