Step-by-step explanation:
1. 57 degrees
2. B
3. 117 degrees
4. C
Answer:
1 hour
Step-by-step explanation:
The speed ratio is ...
... truck : car = 1 : 1.5
Then the ratio of truck speed to the sum of their speeds is ...
... truck : combined = 1 : (1+1.5) = 1 : 2.5
Since time is inversely proportional to speed, the two vehicles will meet after 1/2.5 times the time the truck takes to cover the distance. That is ...
... (2.5 hours)/2.5 = 1 hour
_____
The truck speed is 145 mi/(2.5 h) = 58 mi/h.
The car speed is 1.5 × 58 mi/h = 87 mi/h.
Their combined speed is 58 + 87 = 145 . . . . mi/h.
So, they will cover the 145 mile distance in 1 hour.
Answer:
The additive inverse of -4 and 
is 4 and 
Step-by-step explanation:
Given numbers -4 and
We have to find the additive inverse of the given numbers.
Additive inverse is the number added to a given number that the sum of number is equal to zero. that is 
For given number a = -4
Let number x is added to -4 so that result is 0
⇒ x = 4
Thus, additive inverse of -4 is +4.
For given number a =
Let additive inverse be x,
⇒ 
Thus, additive inverse of is
Thus, the additive inverse of -4 and is 4 and
It’s just a change of sign. For example y+-1(x+2) or y-x-2 or y-(x+2) all the same thing
