Answer:
(y+1)
Step-by-step explanation:
use quadratic formula.
you will get two values of y
y= 7/5 and y= -1
u can create factors using these values of y (making 0 subject)
like
for 7/5
7/5=y
7=5y
5y-7=0
zero becomes subject in such cases bcz there are no numbers left on that side
now for -1
-1=y
y+1=0
so your factors are 5y-7 and y+1
Answer:
the first one
Step-by-step explanation:
the two planes intersect at line YZ, where they meet
tip: planes intersects at a line, just like how lines intersect at a point
hope this helps :)
Answer:
15
Step-by-step explanation:
Angle c is 180 - 146 = 34
All 3 angles add to 180:
(5y + 3) + (4y + 8) + 34 = 180
9y + 45 = 180
9y = 135
y = 15
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
