-6z=12
z=-2
choose D
that's it
So first you do 5/5 = 1 then you multiply 2*7 = 14 then you do 1 - 14 = - 13
Hope this helps!
You should probably start by changing the fractions into decimals. then you multiply the decimal of 1 1/4 by the decimal of 3 1/2. Next you multiply the decimal of 1 3/4 by the decimal of 3 1/2. then you find the difference and that's your answer, alternatively you could leave them as fractions, do the same thing and then change it into a decimal.
Hope this helps :)
<span> 1.08×10^15
------------------ = 0.4 x 10^4 = 4000
</span><span> 2.7×10^11
answer
4000 times greater</span>