Let X = the 29% alloy and Y = the 60% alloy.
They want a total of 80kg, so you have X +Y = 80
Rewrite that to get X = 80-Y
You also want 0.20X + 0.60Y = 0.52(80)
Replace X with 80-y:
0.20(80-y) + 0.60y = 0.52(80)
Simplify:
16 - 0.20y + 0.60y = 41.6
Combine like terms:
16 +0.40y = 41.6
Subtract 16 from each side:
0.40y = 25.6
Divide both sides by 0.40
y = 25.6 / 0.40
y = 64
Now you have Y replace y with 80 in X = 80-Y
X = 80 - 64
X = 16
They need 64 Kg of the 60% alloy and 16 Kg of the 20% alloy.
Since the slope-intercept form of a line is given by the expression:

Where, m is the slope and b is the y-intercept.
Then, for the function:

The slope is -2 and the y-intercept is (0, 3)
Answer:
P=2T-8, if T=12, Preston, P=24-8=16 years old.
Hope this helps ;)
Answer:
<h2>61°</h2>
Step-by-step explanation:
Use the sine law:

We have:

Substitute:
<em>cross multiply</em>

<em>divide both sides by 6</em>
