The surface area is just the total of material used to make the object. So, in this case the surface area is just the material used to make the whole shoe box.
In this question, it states that you have to find the unit of measure that Alec will use to find the surface area of the box.
In this case, you can choose between inches, cm, ft, or many more.
The first thing you do is find the best unit to measure the shoe box with.
Cm would probably take to long to measure the lengths, and because 1 foot equals 12 inches, some sides of the box may not be 1 foot, so ft may be a little bit big.
So the only unit in between cm and ft is inches.
Inches would probably be the best unit of measure.
Answer:C
Step-by-step explanation:
You convert 17.5 to a decimal that is 0.175 and 0.175 as a fraction is 7/40
Answer:
Step-by-step explanation:
Both expressions are examples of the <em>distributive property</em>, which basically says "if I have <em>this </em>many groups of some size and <em>that</em> many groups of the same size, I've got <em>this </em>+ <em>that</em> groups of that size altogether."
To give an example, if I've got <em>3 groups of 5 </em>and <em>2 groups of 5</em>, I've got 3 + 2 = <em>5 groups of 5 </em>in total. I've attached a visual from Math with Bad Drawings to illustrate this idea.
Mathematically, we'd capture that last example with the equation
. We can also read that in reverse: 3 + 2 groups of 5 is the same as adding together 3 groups of 5 and 2 groups of 5; both directions get us 8 groups of 5. We can use this fact to rewrite the first expression like this: 
.
This idea extends to subtraction too: If we have 3 groups of 4 and we take away 1 group of 4, we'd expect to be left with 3 - 1 = 2 groups of 4, or in symbols: 
. When we start with two numbers like 15 and 10, our first question should be if we can split them up into groups of the same size. Obviously, you could make 15 groups of 1 and 10 groups of 1, but 15 is also the same as <em>3 groups of 5</em> and 10 is the same as <em>2 groups of 5</em>. Using the distributive property, we could write this as 
, so we can say that 
.
