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kakasveta [241]
3 years ago
15

I need help atleast an equation to get started please

Mathematics
1 answer:
aliina [53]3 years ago
4 0
Let x = 50% and y = 13%

We need 5 liters of 27.8% acid.
A) x + y = 5
B) .50x + .13y = (.278 * 5)
We multiply A by -.5
A) -.5 x + -.5 y = -2.5 then we add it to B
B) .50x + .13y = (<span>1.39 </span>)
-.37y = -1.11
y = 3
x = 2
So, we need 2 liters of 50% and 3 liters of 13%.

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HELPPP
aivan3 [116]

Answer:

681ft^2

Step-by-step explanation:

Start by finding the area of the whole thing with the missing triangle:

33 x 22 = 726

Then find the area of the triangle. You can do this by first finding out the side lengths of the triangle:

33 - 24 = 9 and 22 - 12 = 10

Then multiply both sides and divide by two because it is a triangle:

10 x 9 = 90       90/2 = 45

Then subtract the area of the triangle from the rectangle:

726 - 45 = 681

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2 years ago
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3 years ago
A student attempted the work below, identify any errors in each line. If no error is found, describe in words what step was take
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1.No error , he divided by 16 in the 2 sides .
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4.error, as the root gives one positive value and one negative value not only a positive value ,the answer should have been t=+-(d/4)
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3 years ago
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The total revenue R earned (in dollars) from producing a gift box of candles is given by R(p)=-10p^2+800p, where p is the price
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R(25) = -10(25)^2 + 800(25) = -10(625) + 20000 = -6250 + 20000 = $13,750

R(30) = -10(30)^2 + 800(30) = -10(900) + 24000 = -9000 + 24000 = $15,000

b.) For maximum revenue, dR/dp = 0
dR/dp = -20p + 800 = 0
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Therefore, the maximum revenue will be recorded when the price is set at $40.
4 0
3 years ago
There were 700 people in the auditorium. 60% of them were adults and the rest were children. how many adults were in the auditor
ollegr [7]

.60 \times 700 = 420 \\ 700 - 420 = 280
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3 years ago
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