Kim read b books last month. This month she read 18 books. Which expression shows the total number of books Kim has read in the past two months?
A.
b - 18
B.
b + 18
C.
b × 18
D.
b ÷ 18

B. b+18

Step-by-step explanation:

you need to find the sum so you have to add the two numbers

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.