This is the way I do it to find the average.
10 girls times 70 = 700
15 boys times 80= 1200
700+1200=1900 all their scores
1900÷25 (number of boys and girls)=76 or 76%
Answer:
<u>1,600</u>
Step-by-step explanation:
divide the total money by the time to get unit rate such as 4800 divided by 3 equals <u>1600</u>
Also can you give brainliest to all of your questions bc it really hard to get brainliest and it be really nice you can choose who i dont really care but just please do it it helps a lot
A suitable calculator can row-reduce the augmented matrix.
first number: 3
second number: 1
third number: 8
<h2>
Answer:37 paintings of $50 and 15 paintings of $75</h2>
Step-by-step explanation:
Let
be the number of paintings Ella sells for $
.
Let
be the number of paintings Ella sells for $
.
Profit made through $
paintings is ![50x](https://tex.z-dn.net/?f=50x)
Profit made through $
paintings is ![75y](https://tex.z-dn.net/?f=75y)
So,total profit is given by ![50x+75y](https://tex.z-dn.net/?f=50x%2B75y)
It is given that total profit is $![2975](https://tex.z-dn.net/?f=2975)
So,
..(i)
Given that the total number of prints is ![52](https://tex.z-dn.net/?f=52)
So,
..(ii)
using (i) and (ii),
![50x+75(52-x)=2975\\50x+3900-75x=2975\\25x=925\\x=37](https://tex.z-dn.net/?f=50x%2B75%2852-x%29%3D2975%5C%5C50x%2B3900-75x%3D2975%5C%5C25x%3D925%5C%5Cx%3D37)
![y=52-x=52-37=15](https://tex.z-dn.net/?f=y%3D52-x%3D52-37%3D15)
0.25r-0.125+0.5r=0.5r
0.75r-0.125=0.5r
-0.125= -0.25r
r=0.5