Steve is 7 years older than his sister Jackie. The sum of their ages is 45 years. How old are Steve and Jackie?

Answer these questions showing your work plz

For each polynomial, determine the degree and write the polynomial in descending order. a. –4x^2 – 12 + 11x^4 b. 2x^5 + 14 – 3x^4 + 7x + 3x^3

Can someone factor this fully? my friend and i have two different answers and i would like to know if either of them is right. you in advance. a^2 - b^2 + 25 + 10a