There were 29 blue cars and 31 red cars on the street. How many cars are on the street? Write the strategy you use to solve the problem

You would add the number of blue Cars to the number of red cars.

Step-by-step explanation:

29

+31

Add 1 to 9 which gives u 10. Put down the zero and carry the 1 put it above the 2. Add 3 to 2 and add the 1 which u put above the 2 and u get 60.

Or, take away 1 from 31 and make it 30. Add that 1 to 29 and make it 30 as well, once u get 30+30 just add and get 60

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.