Answer:
3; Sara is driving 30 miles per hour
Step-by-step explanation:
Here in this question, we want to select which of the options represent what a unit rate is.
When we talk of rate, we are referring to how a particular measured entity is changing in relation to another measured entity. Hence, we are simply looking at how there is a change between two measurable quantities.
Option 1 is not rate, it only tells us Sara ate 1 cookie. How Sara did this, we do not know, whether fast or slow
Option 2 is just measuring distance. We only know that Sara traveled a particular distance. We do not know how fast, or slow this has occurred
Option 3 is our answer. It clearly tells us how the distance Sara is traveling is measured against time
Option 4 is not correct, we only know the number of crackers and apples are, the rate at which this is done, we do not know
Answer:21 blue marbles
Step-by-step explanation:
(3r-9)+r=31
4r-9=31
4r=40
r=10 Red marbles
B+
b+(10)=31
b=21 blue marbles
Answer:
![r^{2}=\frac{V}{\pi h}](https://tex.z-dn.net/?f=r%5E%7B2%7D%3D%5Cfrac%7BV%7D%7B%5Cpi%20h%7D)
Step-by-step explanation:
To solve an equation for one of its variables do that:
- Underline the variable
- Separate it one side and the other terms on the other side
- Make its coefficient equal to 1
Let us use these steps to solve our question
∵ V = πr²h
→ Underline r²
∴ V = π<u>r²</u>h
→ Take π and h to the other side by dividing both sides by πh
∵ ![\frac{V}{\pi h}=\frac{\pi r^{2}h}{\pi h}](https://tex.z-dn.net/?f=%5Cfrac%7BV%7D%7B%5Cpi%20h%7D%3D%5Cfrac%7B%5Cpi%20r%5E%7B2%7Dh%7D%7B%5Cpi%20h%7D)
∴ ![\frac{V}{\pi h}=r^{2}](https://tex.z-dn.net/?f=%5Cfrac%7BV%7D%7B%5Cpi%20h%7D%3Dr%5E%7B2%7D)
→ The coefficient of r² is 1, so switch the two sides
∴ ![r^{2}=\frac{V}{\pi h}](https://tex.z-dn.net/?f=r%5E%7B2%7D%3D%5Cfrac%7BV%7D%7B%5Cpi%20h%7D)
All of those numbers have nothing but ones digits, that is, they're all single digits. j=4, k=5, and n=6.
<h2>
Answer:</h2>
The maximum number of pencils that he must select in order to ensure that he selects at least 2 pencils of each color is:
26
<h2>
Step-by-step explanation:</h2>
Since, Ben has 30 pencils in a box.
Each of the pencils is one of 5 different colors, and there are 6 pencils of each color.
This means that if he draw 24 pencils then there may be a worst case that all these pencils must be of 4 of the 5 colors and none of the pencil of the 5th color is drawn.
This means that in order to confirm that he has at least 2 pencils of each color he need to draw 2 more pencils.
This means that he need to draw: 24+2=26 pencils.