Help! For 10 points!

What is the value of
expressed in base 10?

Would really appreciate if you explained how the answer works as well.

Which functions shave a maximum and are transformed to the left and down of the parent function ,check all that apply f(x) = x2? p(x) =14 (x+7)2 + 1

How do you solving the solution of each system using elimination?

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.