Which of the following expressions are equivalent to −3.5(2 − 3n) − 2.5n?

a. −7 − 8n
b. −7 + 8n
c. −7 − 13n
d. −7 − n(10.5 − 2.5)

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

Mexico city, mexico, is the world's second largest metropolis and is also one of its fastest-growing cities with a projected growth rate of 3.2% per year. its population in 1991 was 20,899,000 people. use the formula p = 20.899e0.032t to predict its population p in millions with t equal to the number of years after 1991. what is the predicted population to the nearest thousand of mexico city for the year 2010?

Abcd is a square. what is the measure of angle bac