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Dmitrij [34]
3 years ago
15

4.

Mathematics
1 answer:
Svetach [21]3 years ago
5 0

Answer:

A. b2 – 4ac = 0

Step-by-step explanation:

Hey user☺☺

Option a is correct

Because the graph has only one solution.

As the graph touches the x-axis at one point that means that it will have only one solution for x. But we know that a quadratic equation has two solutions. So the graph will have two equal solution and therefore the discriminant will be 0.

Hope this will help☺☺

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3 0
3 years ago
Find the four arithmetic means between -21 and -36.
lara31 [8.8K]
The numbers given in the problem above are part of an arithmetic sequence with first and sixth terms equal to -21 and -36, respectively. Firstly, calculate for the common difference (d).
 
                                    d = (-36 - -21) / (6 - 1) = -3

The arithmetic mean is calculated by adding -3 to the term prior to it. 

            a2 = -21 + -3 = -24               a3 = -24 + -3 = -27
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Thus the four arithmetic means are -24, -27, -30, and -33.
4 0
4 years ago
8. Stephanie bought a pair of earrings for $3.25 and a necklace for
Marysya12 [62]

Answer:

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Step-by-step explanation:

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hope it helps :)

6 0
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Answer:

y = 2x + 4

Step-by-step explanation:

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