Step-by-step explanation:
the product of a number and 5
<em>n</em> - number
the product - it's multiplication
<h2><em>n · 5 = 5 · n = 5n</em></h2><h2 />
the difference of a number and 7
<em>n</em> - number
the difference - it's subtraction
<h2><em>
n - 7</em></h2>
You have to be very careful how you set this up. For every girl (who counts as 1) there are 3 boys (who count as 3). The total number in the proportion is 3 + 1 =4. You are given a total, but that is both boys and girls. That's why you need the 4.
3/4 = x / 236 Cross multiply
4x = 3 * 236
4x = 708 Divide by 4
x = 708/4
x = 177
There are 177 boys at the school and 236 - 177 = 59 girls.
Answer:
11
Step-by-step explanation:
To do this you would just multiply 9 by 3 so you get 27 and subtract 6+10 which is 16 from it and then you will get 11 and that is what you will need for your third score
