How to find the surface area of a rectangular prism with the length of 4.2 , height of 3.9 and width 18.7

Simplify 5 square root of 7 end root plus 12 square root of 6 end root minus 10 square root of 7 end root minus 5 square root of 6 . (1 point) 5 square root of 14 end root minus 7 square root of 12 5 square root of 7 end root minus 7 square root of 6 7 square root of 12 end root minus 5 square root of 14 7 square root of 6 end root minus 5 square root of 7

Cuántos triángulos forman un diamante

Ali was paid $75 for mowing a neighbor''s yard. this is one fourth of the amount of money she earned all summer