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:

Step-by-step explanation:
Given
![3y + 7 + 4y + 3 = [\ ]y + [\ ]](https://tex.z-dn.net/?f=3y%20%2B%207%20%2B%204y%20%2B%203%20%3D%20%5B%5C%20%5Dy%20%2B%20%5B%5C%20%5D)
Required
Simplify
We have:

Collect like terms

Evaluate like terms

Answer:
27.8%
Step-by-step explanation:

0.722 = 72.2%
The % reduction is:
(100-72.2)% = 27.8%
Hope this helps
Answer:
Step-by-step explanation:
make two equations
one equation is about the money and one is about counting how many coins
Money equation : .10d + .25q = 5.80
this assigns the value of the dimes at 10 cents and the value of the quarters at 25 cents.
counting equation: d + q = 40
so the answer is C
Answer:
-24
Step-by-step explanation:
-12, -15, -18, -21,
Notice that we are subtracting 3 each time
-12 -3 =-15
-15 -3 = -18
So -21 -3 = -24