Which expression represents the sum of an unknown number and 22? a. 22 ÷ n b. 22 * n c. n - 22 d. n + 22 the " * " is supposed to be a dot.

n + 22

Its option D  Answer

d

Step-by-step explanation:

correct answer:

b.(19,-2)

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.