Round to the under line place value (I need help ima give away 50 points if u help)

Look at the digit just to the right of the '2' and we see a '9'. Since 9 is larger than 5, it tells us to round the 2 up to 3. We replace everything after this with a 0

5729.087 becomes 5730.000 and that's simply 5730

We're rounding this to the nearest tens place. So you can ask yourself "is the given value closer to 5720? or is it closer to 5730?". The answer is 5730 which you can use subtraction to compare the differences. The smaller the difference will determine the winner in which value to pick.

38.5

step-by-step explanation:

lets say, first number = r

second number = 3r+7

total = 49

(r)+(3r+7)= 49

4r+7 = 49

4r = 42

r = 42/4

r= 10.5

3r+7 = 3(10.5)+7 = 38.5

hope this