Y is indirectly proportional to x. when y=7, x=9
a) work out an equation connecting y and x.
b) work out the value of y when x=21

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,

the answer is a if my teacher taught me correct

there would only be 50 odd numbers between 1 and 100 so therefor there would be 50 even so that would only be 50 odd numbers.