Answer:
1.c
2.a
3.d
4.a
5.c
6.b
Step-by-step explanation:
sina=cos b
cosa= sin b
Every x value should have only one value of y.
So the answer is the last choice.
15% of 20 gal = 0.15 * 20 gal = 3 gal, so the solution contains 3 gal of salt.
If we add <em>x</em> gal of water to the solution, we end up with (20 + <em>x</em>) gal of solution. We want the new mixture to have a concentration of 10%, or
10% of (20 + <em>x</em>) gal = 0.1 * (20 + <em>x</em>) gal = 2 + 0.1<em>x</em> gal
of salt.
The amount of salt in the tank hasn't changed. Solve for <em>x </em>:
2 + 0.1<em>x</em> = 3
0.1<em>x</em> = 1
<em>x</em> = 10 gal
Answer:
2/15
Step-by-step explanation:
2/3*5
2/3*1/5=2/15
*=multipliy
