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Ray Of Light [21]
3 years ago
6

How do you know that substitution gives the answer to a system of equations?

Mathematics
1 answer:
Cerrena [4.2K]3 years ago
3 0
It gives the answer to a system of equations because it explains it
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Ruben bought 6 comic books for $21dollar , 21. Each comic book was the same price.
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Answer:

3.5 dollars

Step-by-step explanation:

The price of one comic book is 3.5.

I got this by dividing 21 and 6  

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A) Simplify the expression and explain each step
Arte-miy333 [17]
4x3x = 12x
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What is the answer to the question?
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= 2. Given the quadratic equation 3x2 – 8x + k = 0 has no real roots. Find the range of values of k.
VashaNatasha [74]

\text{If there  are no real roots, then}\\\\~~~~~\text{Discriminant} < 0\\\\\implies b^2 -4ac < 0\\\\\implies (-8)^2 -4 \cdot 3 k < 0\\\\\implies 64-12k < 0\\\\\ \implies 12k > 64\\\\\implies k > \dfrac{64}{12}\\\\\implies k > \dfrac{16}3\\\\\text{Interval,}~ \left( \dfrac{16}3, ~\infty\right)

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2 years ago
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HG = EF

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