Hector found twice as many seashells as his sister. Hector found 20 seashells.
How many seashells did his sister find?
Write an equation to represent the
situation. Then solve the equation to
answer the question.

Tina practice piano for 15 hours last month and 45 hours this month use multiplication to write a statement comparing me i was tina practice during the two months use addition to write a statement comparing the hours tina practice during the two months

Given a(-12,5) and b(12,29) find the point that divides the line segment ab three-eighths of the way from a to b

Write a polynomial function f of least degree that has rational coefficients, a leading coefficient of 1, and the given zeros. 3, 4+2i, 1+(sqrt)7 the answer is supposed to be: f(x)=x(^5)-13x(^4)+60x(^3)-82x(^2)-144x+360 what am i doing wrong?