Answer:
12 yds and 6 feet, aka 42 feet.
Step-by-step explanation:
You multiply everything by 3. Then you convert yards to feet, then add everything together.
Additive inverses combine to get 0. So, k is -1.4. The sum is 0. Hopefully that will help.
Answer:
Widgets should be sold by $38.88 to maximize the profit.
Step-by-step explanation:
Vertex of a quadratic function:
Suppose we have a quadratic function in the following format:

It's vertex is the point 
In which


Where

If a<0, the vertex is a maximum point, that is, the maximum value happens at
, and it's value is
.
In this question:
The profit is given by:

Which is a quadratic function with 
The maximum profit happens at the x of the vertex. Thus

Widgets should be sold by $38.88 to maximize the profit.
Answer: 21
Step-by-step explanation:25%=1/4
1/4*84 =84/4
84/4=21
Answer:
7/25
Step-by-step explanation:
First we need to determine how many total marbles
9blue+7red+4green+5purple = 25 marbles
P(red) = red/total
= 7/25