Answer:
20x + 15 = 11
Step-by-step explanation:
First you need to add the like terms:
-7+2=-5
Now you need to expand the brackets:
-5*-4x=20x
-5*-3=15
Now you have 20x + 15 = 11. So if you want you can rearrange the formule to find x.
20x=-4
x= -5
Answer:sorry can't answer that :(
Answer:
9!=362880 ways
Step-by-step explanation:
It is given that there are 4 different mathematics books and 5 different science books.
So basically there are 9 different books. So we have 9 choices for the first book, 8 choices for the second book, since we have placed the first one. We have 7 choices for the third book and so on. Therefore, we can arrange 9 different books in,
!9 ways, on solving !9 we get,

So there are 362,880 ways to arrange 9 different books if there are no restrictions.
Answer:
D 9.1 x 10^(-4) oz
Step-by-step explanation:
9.17 x 10^(-4) oz - 2.66 x 10^(-6) oz =
= 9.17 x 10^(-4) oz - 0.0266 x 10^(-4) oz
= 9.1 x 10^(-4) oz