1. 32 lb 9 oz + 43 lb 15 oz =
a. 76 lb 24 oz
b. 76 lb 8 oz
c. 68 lb 8 oz
d. 75 lb 24 oz

B

Step-by-step explanation:

1 pound = 16 ounces

15 + 9 = 24

24 - 16 = 8

32 + 43 = 75

75 + 1 = 76

76 lb 8 oz

last option

step-by-step explanation:

given that δdef is right and isoceles,

assuming that side df is the hypotenuse means that de an ef are the other 2 sides that intersect at 90° and are of equal length.

because they are of equal length, we can say that they are congruent

because they intersect at 90°, their slopes must be opposite reciprocals.

only the last option satisfies these conditions.