Answer:
about 130 marbles
Step-by-step explanation:
round 47 to 50
round 76 to 80
you have about 130 marbles
About 100.
47+76=123
123 is closer to 100 than to 200.
3.73 ( The three is infinite)
She needs another 2 and a half hours, so <em><u>2.5 is your answer</u></em>
3a+b= 54
3a+9=54
3a=54-9
3a=45
a=45/3
a= 15