Mr. chaves spent $199.99 for a new smart phone $39.99 on a carrying case, and $59.99 on accesiories. the expression l-199.99l+l39.99l+l59.99l represents the total amount that mr. chaves spent. how much did he spend all together. first answer will get brainiliest

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.

true

step-by-step explanation: