Hi there,
There are 16 members in a math club such as 2 girls and 14 boys in a math club.
The ratio would be:
1:7
Divide both terms by 2.
2 ÷ 2 = 1
14 ÷ 2 = 7
Therefore:
2 : 14 = 1 : 7
Let’s call the number of gallons of 30% solution “x”. If we mix together 40 gallons and x gallons of solution, we’re going to come out with a total of 40 + x gallons of that 20% solution. Mathematically, this is
40(12%) + x(30%) = (40 + x)(20%)
With the percents as decimals:
40(0.12) + x(0.3) = (40 + x)(0.2)
Simplifying, we have:
4.8 + 0.3x = 8 + 0.2x
Collecting the x terms on one side and the constants on the other:
0.1x = 3.2
And multiplying both sides by 10 to find x:
x = 32
So, you’ll need 32 gallons of 30% solution to yield 40 + 32 = 72 gallons of 20% solution.
Answer:
This is incomplete. What do you need to find? There's not enough information to figure out what to do.
Step-by-step explanation:
Answer:
y=3/4x+5
Step-by-step explanation: