35
Step-by-step explanation:
30+20=50
50-15=35
(Brainliest helps)
28 days
Step-by-step explanation:
There are 7 days in 1 week. We can find the amount in 4 weeks by multiplying the amount of 7 by 4.
7(4)=28 days
We can use a number line to solve this by making 4 groups of 7.
0 7 14 21 28