He can buy up to 71 trees with $1000. He could also buy up to 199 bushes with $1000. Any combination of the two would work.
<span> x=<span><span><span><span>3</span> and </span></span>y</span></span>=<span>2 to check use the first equation y=5x-13 you plug in x which is 3 5 times 3 equals 15 15-13 equals 2 y=2</span>
√384 = <span>√2x2x2x2x2x2x3x2
= 8</span><span>√6
Hope this helps!</span>