The reciprocal of -1/3 is -3/1
and the reciprocal of 4/1 is 1/4
Answer:
The gallons of fuel car need to travel 30 km is <u>0.75</u> approximately .
Step-by-step explanation:
Given:
The car can travel 25 miles per gallon. (1 mile = 1.6 km)
Now, we need to convert 25 miles into km .
25 miles = 25 × 1.6 km
= 40 km
So, the car can travel 40 km per gallon.
Then, we find out in 1 km how many gallons are used:



Now, we find out how much gallons of fuel will the car need to travel 30 km:
Gallons of fuel the car need to travel 30 km = 
=
.
Therefore, the gallons of fuel car need to travel 30 km is 0.75 approximately.
Answer:

Step-by-step explanation:
Given


Required
Find PQR
Since both angles are supplementary, we have:

This gives:


Collect Like Terms


Divide through by 10

Substitute 20 for X in 


Answer:
<em>No. of cuboids required to form a cube = 2*2*5 = 20 Therefore, 20 cuboids will be required to form a cube.</em>