x = amount of 21% alloy
y = amount of 50% alloy
The metallurgist wants a combination weighing a total of 44 lb, so
x + y = 44
Each pound of either alloy contributes either 0.21 or 0.5 pound of titanium. The final product needs to be comprised of 37% titanium; weighing at 44 lb, this means it should contain 0.37 * 44 = 16.28 lb. So
0.21x + 0.5y = 16.28
From the first equation,
x + y = 44 ==> y = 44 - x
Substitute this into the second equation and solve for x:
0.21x + 0.5(44 - x) = 16.28
-0.29x = -5.72 ==> x = 19.72
Substitute this into the first equation to solve for y:
19.72 + y = 44 ==> y = 24.28
a=2, b=3
Then just substitute in a and b.
Hope I helped, I've had this problem before!
~Mschmindy
Answer:
100+629
Step-by-step explanation:
108 + 621
-8 +8
100 + 629
Answer:
1.75 cases need to be sold
Step-by-step explanation:
The complete question is
The high school tennis team is selling tennis balls to raise $500 for new equipment.They sell the balls for $2 each.
4).How many cases of tennis balls does the tennis team have to sell in order to raise enough money for new equipment.
Solution
Price of each ball = $4
No. of balls in each package = 3
Total number of balls that need to sold in order to raise $500 is
one package = 3balls
Hence no of packages to be sold
packages and 2 balls or total 42 packages
1 case has 24 packages , thus total number of cases to be sold = 
<span>(3x^2+3)(4+x^3)
=</span><span>12x^2 +3x^5 + 12 + 3x^3
= </span>3x^5 + 3x^3 + 12x^2 + 12
