4. 3\sqrt{12} - 8\sqrt{48}
5. \sqrt{\frac{8}{56}}
6. \sqrt{\frac{10}{81}}
7. \frac{6}{\sqrt{63}}
8.\sqrt{\frac{100}{27}
9. \sqrt{6} (\sqrt{30} - 2)
10. (-3 \sqrt{15} )(-4 \sqrt{5} )

what are you doing do you need examples of variable questions?

step-by-step explanation:

5a-1=9               bring the one over the =

5a=10                     divide by your variable

a=2

brainliest? ?

here try this one

3a-24=0

answer: no

step-by-step explanation: because the big angle will spread away the 2 side that it is on and make the opposite side even longer.

you just switch the numbers basically so it would be 3/17