First off, let's convert the percentages to decimal format, so our 77% turns to 77/100 or 0.77, and our 55% turns to 55/100 or 0.55 and so on
now, the sum of both salines, must add up to the 77% mixture, let's say is "y"
so, 11 + 4 = y, and whatever the concentration level is, must also sum up to the mixture's concentration of 77%
anyway thus
solve for "x"
(2x+1)=Jeremy´s age
(2x+3)=Sam´s age.
we suggest this equation:
(2x+1)(2x+3)=783
4x²+6x+2x+3=783
4x²+8x-780=0
x²+2x-195=0
We solve this quadratic equation:
x=[-2⁺₋√(4-4*1*(-195))]/2=(-2⁺₋28)/2
x₁=(-2-28)/2=-15 this solution is not valid.
x₂=(-2+28)/2=13
Jeremy´s age=2x+1=2*13+1=27
Sam´s age=2x+3=2*13+3=29
Answer:×¹ = -4, ײ = -2, ׳ = 1, ×⁴ = 3
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Step-by-step explanation:
Hope this helps :)
Answer:
3. 9 free throws. Proportion: 9/15
4. 18 free throws. Proportion: 18/24
Step-by-step explanation:
Multiply the number of free throws by the decimal of the percentage:
15*60%=15*.60=9
18*75%=18*.75=18.
The proportion is the number of free throws made over the total number of free throws attempted.
Hope this helps! :)
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The answer is (-3, -6)
Step-by-step explanation:
turn the x into a y, and the y into a opposite x.
