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mash [69]
3 years ago
12

Use the discriminant to determine the number of real solutions to the quadratic equation. 5a2+30a+45=0

Mathematics
1 answer:
Eddi Din [679]3 years ago
7 0

Answer:

1

Step-by-step explanation:

30^2 - 4(5)(45)

900 - 900

0

The discriminant works out to be 0, so there is one solution.

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Write an inequality to describe the region represented on the number line.
vovangra [49]

Answer:

See explanation

Step-by-step explanation:

The question is incomplete, as the required number line is not included in the question.

A general explanation is as follows:

An open circle means > or <

A closed circle means >= or <=

Take, for instance, the attached number line:

The open dot on -3 means >-3 or <-3

The arrow points to the right direction, means >-3 i.e. greater than -3

Hence, the inequality is:

x > -3

7 0
3 years ago
the graph of liner function f passes through the point (1,-9) ad has a slope of -3 what is the zero of f
Lostsunrise [7]

Answer:

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Step-by-step explanation:

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8 0
2 years ago
Solve 5x(m+n) using the distributive property
Genrish500 [490]

Answer: 5xm+5xn

Step-by-step explanation:

For this exercise it is necessary to remember the following:

1) The Distributive Property states the following:

a(b+c)=ab+ac\\\\a(b-c)=ab-ac

2) The multiplication of signs:

(+)(+)=+\\(-)(-)=+\\(-)(+)=-\\(+)(-)=-

Knowing this, and having the following expression given in the exercise:

5x(m+n)

You can apply the Distributive property multiplying m and n, which are inside the parentheses, by 5x.

So, you get the following result:

=(5x)(m)+(5x)(n)=5xm+5xn

4 0
3 years ago
Solve:<br> r/5 - 6 = -1<br><br> A) r = 1 <br> B) r = 5 <br> C) r = 10 <br> D) r = 25
nadezda [96]

r/5 - 6 = -1

add 6 to both sides

r/5 = 5

multiply both sides by 5

r = 5 *5 = 25

r = 25

3 0
3 years ago
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Answer:

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Step-by-step explanation:

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