The ratio of money in Brian's wallet to Colin's wallet one day was 7:2. Brian spent £39 that day. Brian now had £4 less than Colin. How much did Brian initially have?

£49.

Step-by-step explanation:

Let the ratio of  brain's money to Colin's is 7x : 2x.

From the given info:

7x - 39  = 2x - 4

5x = -4 + 39 = 35

x = 7

So initially Brian had 7*7 = £49.

Colin had £14.

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step-by-step explanation:

see attached

step-by-step explanation:

given the function as;

write the equation replacing f(x) with y

form   and fill a table containing values of y with corresponding values of x

you can take a range for   values of x as -3≤x≤3

solving for x=-3

for x=-2

repeat the same procedure to get the values of y for the remaining ,x=-1 to x=3

plot the values of y against values   of x and obtain the following graph