<span>(u-9)6
= 6u - 54 ...expanded by using distributive property
hope that helps</span>
Well, since you have the value of b, the first thing you want to do is substitute that value in for b.
5a - 10(3) = 45
10*3 = 30
5a - 30 = 45
Now, to get the variable by itself (a) you have to + 30 because you have to reverse the subtraction.
5a = 75
Now, you divide by 5 to finish getting a by itself.
a = 15
Hope this helps!
I think she bought 23 feet
1. Use the Multiplication Distributive Property: (xy)^a = x^a y^a
3√6 3√x √y^2
2. Use this rule: (x^a)^b = x^ab
3√6 3√xy^2/3
