You have to combine like times then solve the equation sooo.....
-910y+25y=?
-4+7=?
So whatever those answers, you will use them to make your new equation to find what y equals.
Hope this helps!
Answer:
195 mL of the 90% solution
Step-by-step explanation:
Let the number of mL of 90% mixture = x
Hence, our equation is
780mL × 15% + x mL × 90% = (780mL + x) 30%
117 + 0.9x = 234 + 0.3x
Collect like terms
0.9x - 0.3x = 234 - 117
0.6x = 117
x = 117/0.6
x = 195 mL
Therefore, You will need 195 mL of the 90% solution
Answer:
$459.551
Step-by-step explanation:
18% of 389.45 is 70.101 (the tip)
389.45+70.101=459.551 (the total)
600/60=10
600 seconds equals 10 minutes
Answer:
-162
Step-by-step explanation:
23=5-2/3d
2/3d=-18
d= -27
6d= 6* -27
6d= -162
