Answer:
Step-by-step explanation:
2/3×7/8=7/12
Answer:
y=4x
Step-by-step explanation:
Answer:
Step-by-step explanation:
Decrease = 100 - 49 = 51
Percentage of decrease =
= 51%
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
The sale price is going to be 17.5