-7+(-3) PLEASE SHOW WORK AND HURRY

Pyotr tchaikovsky sporting goods operates on a 45% overhead based on the selling price, which results in an overhead of $65.34 on the newest version of an air hockey game set. if the air hockey game set costs pyotr tchaikovsky sports $49.32, find the selling price, the markup, and the net profit.

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 9 + 12x + 4x^2