Answer:
yes
Step-by-step explanation:
this is a function as there are no negative exponents/fractions as exponents/division in the function....this is in fact a binomial hope this helps!
The first answer is [7, (infinity symbol) )
the second one is (1, (infinity symbol) )
Answer:
![\left\{ \begin{array}{ll} a+s+r=350 \\ 4a+2.5s+2r=1095\\r=s-40 \end{array} \right.](https://tex.z-dn.net/?f=%5Cleft%5C%7B%20%20%20%20%20%20%20%20%5Cbegin%7Barray%7D%7Bll%7D%20a%2Bs%2Br%3D350%20%5C%5C%20%20%20%20%20%204a%2B2.5s%2B2r%3D1095%5C%5Cr%3Ds-40%20%20%20%20%20%20%20%20%5Cend%7Barray%7D%20%20%20%20%5Cright.)
Step-by-step explanation:
Let's define our variables. Let a represent the number of adult tickets sold, s represent the number of senior tickets sold, and r represent the number of senior tickets sold.
We know that a total of 350 tickets were sold. So, the number of adult, student, and senior tickets sold must total 350. Therefore, we can write the following equation:
![a+s+r=350](https://tex.z-dn.net/?f=a%2Bs%2Br%3D350)
We know that each adult ticket costs $4, each student ticket costs $2.50, and each senior ticket costs $2. We are given that a total of $1095 was collected. Therefore, the number of tickets multiplied by their respective price must equal $1095. So, we can write the following equation:
![4a+2.5s+2r=1095](https://tex.z-dn.net/?f=4a%2B2.5s%2B2r%3D1095)
Finally, we know that 40 fewer senior tickets were sold than student tickets. So, however many students tickets were sold, we can subtract 40 to get the number of senior tickets sold. Therefore:
![r=s-40](https://tex.z-dn.net/?f=r%3Ds-40)
So, our system of equations is:
![\left\{ \begin{array}{ll} a+s+r=350 \\ 4a+2.5s+2r=1095\\r=s-40 \end{array} \right.](https://tex.z-dn.net/?f=%5Cleft%5C%7B%20%20%20%20%20%20%20%20%5Cbegin%7Barray%7D%7Bll%7D%20a%2Bs%2Br%3D350%20%5C%5C%20%20%20%20%20%204a%2B2.5s%2B2r%3D1095%5C%5Cr%3Ds-40%20%20%20%20%20%20%20%20%5Cend%7Barray%7D%20%20%20%20%5Cright.)
And we're done!
Answer:
5mins
Step-by-step explanation:
well i did 1200 divided y 4 then divided that answer by 60
Answer:
18 (or more)
Step-by-step explanation:
Let's start off by creating an inequality:
Let "r" represent one pet rock
5r > 50 + 2r
Let's cancel out the 2r on the right side of the inequality by subtracting 2r from both sides:
5r > 50 + 2r
3r > 50
Now, to isolate r, we must divide both sides by 3:
3r > 50
r > 16.7
(Since we can't sell 16.7 pet rocks, we round up to 17)
r > 17
That means that Rosa has to sell at more than 17 pet rocks (so 18 or more pet rocks) to make profit.