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yuradex [85]
3 years ago
8

How can I solve systems of equations by substitution method

Mathematics
1 answer:
almond37 [142]3 years ago
5 0
This kind of hard to explain without an example, so I'll do my best...
All you have to do is isolate a variable on one side of the equals sign without a coefficient.  Ex:  x=2y+3  The x is all alone and ready to go into the second equation. 
Substitute into the second equation. Ex: 2x+5=3  Substitute: 2(2y+3)+5=3
I hope this helps! 

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The volume of a cone with a height of 4 cm is 12π cubic cm. What is the radius of the base?
blondinia [14]

Answer:

r = 6cm

Step-by-step explanation:

Solve for r:

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12\pi =  \frac{1}{3} \pi {r}^{2}  \\ 12\pi =  \frac{\pi {r}^{2} }{3}  \\ 3 \times 12\pi = \pi {r}^{2}  \\ 36\pi = \pi {r}^{2}  \\  \frac{36\pi}{\pi}  =  \frac{\pi {r}^{2} }{\pi}  \\  \sqrt{ {r}^{2} }  =  \sqrt{36}  \\ r = 6

4 0
2 years ago
One Year, the price of wheat was $8.87 per bushel. The next year, the price was $9.60. Round the price per bushel of wheat for e
Alex787 [66]
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3 years ago
What is 2+2+2-2+87 plz tell me so u would get 100 points
DedPeter [7]

Answer:

The answer is 91.

Step-by-step explanation:

Since 2+2+2=6 and you subtract 2 that would now be 6-2, and that is 4.

87+4=91.

Simply 6-2=4

87+4=91

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2 years ago
Tomas has $1,000 to spend on a vacation. His
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Answer:

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