<span>6(-3r)=-39+3r
-18r = -39+3r
39 = 18r + 3r
39 = 21r
39/21 = r
13/7 = r
r = 13/7</span>
Answer:
Approximately 
Step-by-step explanation:
we know that
The volume of a cylinder (barrel) is equal to
in this problem we have
-----> the radius is half the diameter
substitute
<u>Convert to gallons</u>
which pairs of the triangle must be similar the answer is b
Answer:
5(k + 1) and 5k + 5
Step-by-step explanation:
The easiest way to do this is to pick any number to substitute in for the variable <em>k </em>for ALL of the expressions, and find the expressions that equal the same as the first expression being compared.
For example, lets just make <em>k </em>equal 1 to make things easy. Plug 1 into <em>k</em> into the first expression. 2k + 2 + k + 3 + 2k → 2(1) + 2 + (1) + 3 + 2(1) = 10.
Now we do the same to the rest of the expressions and see which ones ALSO equal 10.
5(k + 1) → 5(1 + 1) = 10
5k + 5 → 5(1) + 5 = 10
5 + k^5 → 5 + (1)^5 = 6
5k^5 → 5(1)^5 = 5
