Which of the following expressions is equivalent to a + (-b)
a. (-b) + a
b. b + (-a)
c. (-a) + b
d. none of the above
!

For this case we must find an expression equivalent to:

It is observed that the negative sign is associated with the variable "b". So, we have to express:

is equivalent to the initial expression but of different order.

Option A

answer: 0.95, d

step-by-step explanation:

first, you have to combine the percentages of costumers ordering pizza or salad. 25% (percent of salads ordered) plus 70% (percent of pizzas ordered) is equal to 95%. then, turn 95% into a fraction: 95/100. lastly, divide 95 by 100 and you will get 0.95, d.