Please help my assignment

If 1 is divided by the sum of y& 4. the result is equal to 3 divided by 4 .find the value of m?

Atriangle has a side lengths of 18cm, 80 cm and 81cm. classify it as acute obtuse or right?

With this question substitute t=3 and t=5 to determine if the two expressions are equivalent. 4(t + 3) 4t+12 which statements are true? check all that apply. a. the value of both expressions when t =5 is 32. b. the two expressions are not equivalent. c. the value of both expressions when t=3 is 15. d. the value of both expressions when t=5 is 23. e. the two expressions are equivalent. f. the value of both expressions when t=3 is 24.