Can you please explain? I haven't learned this yet.

That should be 36x10^12

Step-by-step explanation: Scientific notation is basically a way of making a big number small instead of writing a ton of zeroes we can just write it in scientific notation. In this case the answer would be 36 trillion which would be a lot of zeroes so with scientific notation we write it as 36x10^12  btw the ^ is to make it an exponent so its 10 to the twelfth power. So you can just solve the basic equation to get the real number. So the answer is 36x10^12.

21.4 i did it already for s1

step-by-step explanation:

5x + 5

step-by-step explanation:

you should always add the diagrams and graphs we cannot see. this particular question is kind of borderline because we can make a graph for you.

(f + g)x = -x^2 +3x + 5 + x^2 + 2x

(f + g)x = 5x + 5

the graph of z = 5x + 5 is shown below. always use desmos when in doubt.