27 6 boys have a mean age of 10 years.
14 girls have a mean age of 5 years.
Work out the mean age of all 20 children.

What is the sum of these mixed numbers 2 1/8 + 4 3/8

What is the prime factorization of 23 ?me with this question

Alina fully simplifies this polynomial and then writes it in standard form. xy2 – 2x2y + 3y3 – 6x2y + 4xy2 if alina wrote the last term as 3y3, which must be the first term of her polynomial in standard form? xy2 5xy2 –8x2y –2x2y