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bearhunter [10]
2 years ago
6

Graph the equation (please hurry)

Mathematics
1 answer:
KatRina [158]2 years ago
4 0

Answer:

I would start at ( -2, -0) and make a line

Step-by-step explanation:

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A metallurgist needs to make 12.4 lb. of an 10) alloy containing 50% gold. He is going to melt and combine one metal that is 60%
sergeinik [125]
Now, let's say, we add "x" lbs of the 60% gold alloy, so..  how much gold is in it?  well, is just 60%, so (60/100) * x, or 0.6x.

likewise, if we use "y" lbs of the 40% alloy, how much gold is in it?  well, 40% of y, or (40/100) * y, or 0.4y.

now, whatever "x" and "y" are, their sum must be 12.4 lbs.

we also know that the gold amount in each added up, must equal that of the 50% resulting alloy.

\bf \begin{array}{lccclll}
&\stackrel{lbs}{amount}&\stackrel{gold~\%}{quantity}&\stackrel{gold}{quantity}\\
&------&------&------\\
\textit{60\% alloy}&x&0.6&0.6x\\
\textit{40\% alloy}&y&0.4&0.4y\\
------&------&------&------\\
\textit{50\% alloy}&12.4&0.50&6.2
\end{array}

\bf \begin{cases}
x+y=12.4\implies \boxed{y}=12.4-x\\
0.6x+0.4y=6.2\\
-------------\\
0.6x+0.4\left( \boxed{12.4-x} \right)=6.2
\end{cases}
\\\\\\
0.6x-0.4x+4.96=6.2\implies 0.2x=1.24\implies x=\cfrac{1.24}{0.2}
\\\\\\
x=\stackrel{lbs}{6.2}

how much of the 40% alloy?  well, y = 12.4 - x.
5 0
3 years ago
A jet flew at a constant of 350 miles per hour for 6 hours and 30 minutes. What distance did the jet travel?
dsp73
The answer is D.

350 multiplied by 6 is equal to 2100

350 * 0.5 (30 minutes) is equal to 175

2100 + 175 = 2275 
5 0
3 years ago
Read 2 more answers
If a square has a perimeter of 36cm how long is each side of the square
erica [24]

Answer:

9 cm

Step-by-step explanation:

→ Remember how many sides a square has

4

→ Divide it by the perimeter

36 ÷ 4 = 9

7 0
3 years ago
Read 2 more answers
Enrique is going to a party this weekend. He is bringing 20 liters of soda to the party. A liter of soda costs $1.59.
yulyashka [42]
It would be 31.80 because if you do 1.59 x 20 that will be the answer
8 0
3 years ago
Differentiate Square numbers and cube numbers
pashok25 [27]

Answer:

square numbers are numbers raised up to the power of two in essence the number multiplied by it self

6 0
3 years ago
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