Answer:
Let the number of five's = 2x = 2x × 5 = 10x
Then the number of ten's = x = x × 10 = 10x
10x + 10x = 640
20x = 640
x = 32
There are 32 ten dollar bills.
Answer:
B. 20÷10=2
Step-by-step explanation:
Well , A and C can not answer 2×10 = 20 , whatever , even have not make the equation correct .
Correct A. 2÷10=2/10=0.2 Even have a correct, still can not answer why 2×10 = 20
_______________________________ (1). 2÷10 ≠ 20 ( Proof )
B. 20÷10=2 This a correct answer (1). 20÷10 = 2 ( Proof )
_______________________________ ↓
_______________________________ (2). 20 = 2×10 ( Proof )
_______________________________ ↓
_______________________________ (3). 20 = 20 ( Proof )
it answered why 2×10 = 20
Correct C. 20×10 = 200 Still Wrong answer
_______________________________ (1). 20×10 ≠ 20 ( Proof )
Hope that will help you to understand
<span>Naming of rays
Rays are commonly named in two ways:
By two points.
In the figure at the top of the page, the ray would be called AB because starts at point A and passes through B on it's way to infinity. Recall that points are usually labelled with single upper-case (capital) letters. There is a symbol for this which looks like this: AB This is read as "ray AB". The arrow over the two letters indicates it is a ray, and the arrow direction indicates that A is the point where the ray starts.
By a single letter. (I have not seen this done.)
The ray above would be called simply "q". By convention, this is usually a single lower case (small) letter. This is normally used when the ray does not pass through another labeled point.</span>
Answer: 6ft³
Step-by-step explanation:
The tank described is a rectangular tank which means that it is a rectangular cube.
The volume of a rectangular cube is calculated by multiplying the length by the width by the height.
Volume of tank is:
= Length * Width * height
= 3 * 1 * 2
= 6 ft³
25/4 = 6.25 per t-shirt <== unit price
the error that was made is the student put the number of t-shirts over the price, instead of the price over the number of t-shirts.
4/25 = 0.16