What dose it mean to group in math

A story has a contest to guess the mass of 10000 peanuts. If a peanut has a mass of about 0.45 then what would be a reasonable guess for the mass of 10000

Subtract - 34.7 from - 7.85

The number 90 is 4 times more than 30

What is the answer to this Fraction question 10 1/2 - 3 5/7

Amanda drove her car 81 km and use 9 L of fuel. She wants to know how many kilometers she can drive on 22 L of fuel. She assumes her car will continue consuming for you at the same rate. How far can a man to drive on 22 L of fuel?

Sarah earns $10 per hour while babysitting and $20 per hour while cleaning houses. Sarah will need to earn $1000 during the summer.

The equation p=2.5m+35 is the cost of making bracelets where ''p'' is the price and ''m'' is the cost of materials. If a bracelet sells for $115, how much was the material?

How do you expand the expression 3 (x+11)

5 (2x + 6) = 8x + 48 simplify.

If 30+12x represents the area of a partitioned rectangle, what could be expressions for the side lengths? List at least 5 possibilities