Answer:
49 kilometers
Step-by-step explanation:
Since he cycles 1 km for each trip, he will have cycled 21 km after 21 trips.
Add this to his existing amount of km:
28 + 21
= 49
So, he will have cycled a total of 49 kilometers
Answer:
Identity Property of Zero
The identity property of 0 states that if you add or subtract 0 from any number, the number will always stay the same. Here are some examples involving whole numbers: 3+0=3 7−0=7 Therefore, x+0=0+x=x. This is also known as the additive identity property of 0.
Step-by-step explanation:
Hope it helps :)
Answer:
=20s³+50s²+32s+6
Step-by-step explanation:
We multiply each of the term in the initial expression by the the second expression as follows:
4s(5s²+10s+3)+2(5s²+10s+3)
=20s³+40s²+12s+10s²+20s+6
Collect like terms together.
=20s³+50s²+32s+6
The answer is D because you would multiply 3 * 6 and 3 * r, getting you 18+3r
Answer: The perimeter is 
Step-by-step explanation:
1. By definition, the formula for calculate the surface area of a cube is:
Where s is the lenght of any edge of the cube.
2. You know that the surface area of the cube of the problem is 
, therefore the lenght of each edge of the cube is:
3. Each face of the cube is a square, therefore the perimeter of one face is:
