On a cold winter day the temperature was -1 below zero. at night the temperature be dropped 4. what was the final temperature

-1 + -4 = -5 below zeroIf the temperature is -1 + 4 the temperature would be 3 degrees (-1+4=3)

Step-by-step explanation:

If the temperature is -1 + -4 = -5 below zero (adding two negatives equal a negative number).

If the temperate is -1 + 4 = 3 (+4-1=3) The number is positive because it is larger than the negative number.

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.