Answer:
40
Step-by-step explanation:
50% is equal to 1/2 so if we multiply 40 by 2 you get 80 then subtract what she already did and you get 40.
hope this helped
Answer:
1 7/9 ounces
Step-by-step explanation:
The final solution will be 9 parts water and 1 part hydrogen peroxide (so that hydrogen peroxide makes up 1 of 10 parts of the solution).
Then each "part" is (16 ounces)/9 = 1 7/9 ounces.
1 7/9 ounces of hydrogen peroxide must be added to 16 ounces of water to make a 10% solution.
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<em>Check</em>
The total amount of solution is 16 +1 7/9 = 17 7/9 ounces = 160/9 ounces. The amount that is hydrogen peroxide is 16/9 ounces, so the fraction that is hydrogen peroxide is ...
(16/9) / (160/9) = 16/160 = 1/10 = 10%
Answer:
The first one is 8
The second one is 4
And the third one is 4
Step-by-step explanation:
answer:
slope: -2/3
step-by-step explanation:
y=mx+b
m represents the slope, and b the y-intercept.
rearrange: 9x= -6y+18
---> -6y= -9x-18
divide all terms by -6.
-6y/-6= -9/-6x-18/-6
y= 3/2x+3 (slope/intercept form)
m= 3/2
---> 1/3/2= -2/3
Answer:
The answer is s=-1 or s=-12
Step-by-step explanation:
First Step: Factor left side of equation.
(s+1)(s+12)=0
Second Step: Set factors equal to 0.
s+1=0 or s+12=0
So, the answer is either -1 or -12