There are 45 pounds and 30 pounds of each type respectively.
Step-by-step explanation:
Since we have given that
Cost of first type = $2 per pound
Cost of second type = $7 per pound
Cost of mixture = $4 per pound
So, we need to find the quantity of each type to make 75 pounds of a blend.
We will use "Mixture and Allegations":
First type Second type
2 7
4
---------------------------------------------------
7 - 4 : 4 - 2
3 : 2
So, Quantity of first type would be

Quantity of second type would be

Hence, there are 45 pounds and 30 pounds of each type respectively.
<span>2(3y - 7) - 5y(2 - y)
2*3y - 2*7 - 5y*2 -5y*(-y)
6y - 14 - 10y + 5y</span>²
5y² + 6y - 10y - 14
<span>5y² -4y - 14</span>
= 394 R 1
= 394 1/3
1183 divided by 3 equals
394 with a remainder of 1
6.4x10^5 + 0.36x10^5 = 6.76x10^5, or 676,000
3/x-3+x/x+3
3(x+3)+x(x-3)/(x-3)(x+3)
3x+9+x^2-3x/(x-3)(x+3)
x^2+9/X^2-9