We let x = pounds of alloy that is 15% tin
The problem is modeled by the equation:
0.11(30) = 0.15x + 0.09(30-x)
The equation means that the amount of tin does not change. Also, the amount of alloy (total weight - weight of 15% alloy) is (30-x).
Solving for x:
3.3 = 0.15x +2.7 - 0.09x
.06x = 0.6
x = 10 lbs
30-10 = 20 lbs
<span>10 lbs. of the 15% alloy and 20 lbs. of the 9% alloy</span>
Answer:q=-81
Step-by-step explanation:6(q-87)=36
6q-522=36
-522 from each side
6q=-486
Divide 6 from each side
q=-81
To find the x, let's look at the sketch below:
All we simply need to do is to use Pythagorars theorem to find y
x is a radius and y is also a radius
Hence x and y are congruent
So Using Pythagoras theorem
y² = 3.6² + 4²
y² = 12.96 + 16
y² = 28.96
Take the square root of both-side of the equation
y ≈ 5.4
Therefore, x= 5.4
Answer:
what percent is 24 of 40
Step-by-step explanation:
20 degrees. i have a protractor, and its really helpful! you should use one.
