Asap i'm struggling so bad, if you are good at math i have a lot of questions i need answered, i am doing an exam for my friends for money i really need, but i have to get a c or i am desperate.

B - expect for 4, x can be any real number

Step-by-step explanation:

In mathematics, division by zero is division where the divisor (denominator) is zero. Such a division can be formally expressed as  a/ 0 where a is the dividend (numerator). In ordinary arithmetic, the expression has no meaning, as there is no number which, when multiplied by 0, gives a (assuming a ≠ 0), and so division by zero is undefined. Since any number multiplied by zero is zero, the expression  0/0 is also undefined.

So, based on this function, we can calculate the number of "x" by the equation below

3x²-12x=0 and 4x-16=0;

99

Step-by-step explanation:

Just do 43 times 7 and then subtract the sum from 400 and you have your answer