A) Gavin’s drinks altogether cost £9.00
1.50+2.50x3
=1.50+7.50
=£9.00
b) Lian gets back £3.50
1.50+2.00+3.00
=6.50
10.00-6.50=£3.50
What do u mean man i don't get it ether sorry brah <span />
we have the following system of equations

we know that
The intersection of both graphs is the solution of the system of equations
using a graph tool
see the attached figure
the solution is the point 
therefore
<u>the answer is</u>
the solution of the system of equations is the point 

First, break it up into two fractions:

Next, you can simplify the numbers outside of the square root:

Since the values are being acted by the same function, being under a radical, you can simplify these too:

Finally, the square root of 4 is 2, so it would be expressed like this:

Your answer should be A.