What is the value of the expression below when x=4x=4? 2x^2 +x-5 2x 2 +x−5

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

Ineed with math stuff it involves graphs

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