Equation is 6x^2
6(4.8)^2
138.24
Answer:
103.5
Step-by-step explanation:
90-76.5=13.5
90+13.5= 103.5
<em>This problem has two variables, b and y. The b value is the number of rows of blue flowers, and the y value is the number of rows of yellow flowers.</em>
<em>In every row of blue, there are 5 flowers.</em>
<em>In every row of yellow, there are 7 flowers.</em>
<em>Therefore, our expression would be 5b + 7y.</em>
<em />
<em>I hope this answers your question.</em>
<em>-Toremi</em>
500 (i don't know if it's right or not, i just googled it.)
Answer:
190 chairs
Step-by-step explanation:
-This is an arithmetic progression with the first term a=10, the common difference is d=2 and the number of terms n=10.
-The sum of n terms in the progression can be calculated as follows:
![S_n=0.5n(a_1+a_n)](https://tex.z-dn.net/?f=S_n%3D0.5n%28a_1%2Ba_n%29)
Where
is the sum of the progression's terms.
are the first and last terms of the progression.
#We calculate
as below:
![a_n=a_1+d(n-1)\\\\a_{10}=10+2(10-1)\\\\=28](https://tex.z-dn.net/?f=a_n%3Da_1%2Bd%28n-1%29%5C%5C%5C%5Ca_%7B10%7D%3D10%2B2%2810-1%29%5C%5C%5C%5C%3D28)
#We then substitute to calculate the sum of the terms:
![S_n=0.5n(a_1+a_n)\\\\=0.5\times 10(10+28)\\\\=190](https://tex.z-dn.net/?f=S_n%3D0.5n%28a_1%2Ba_n%29%5C%5C%5C%5C%3D0.5%5Ctimes%2010%2810%2B28%29%5C%5C%5C%5C%3D190)
Hence, 190 chairs are needed for the 10 rows.