What is the lcd of 4 1/6 and 5 4/7 help me

13
21
42
36

Find the average rate of change for f(x) = x2 − 3x − 10 from x = −5 to x = 10.

Antonio made a scale model of a building. the model's scale is 1 inch to 235 feet and its height is 3.5 inches. what is the exact height of the actual building? enter your answer in the box.

Can someone pls ! pls answer all. no explanation needed..