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Amiraneli [1.4K]
3 years ago
7

Write the equation 0.3x 2 + 5x - 7 = 0 in general form and then choose the value of "b."

Mathematics
2 answers:
bija089 [108]3 years ago
7 0

The answer should be 50 the second option is the correct

USPshnik [31]3 years ago
6 0
The general form of a quadratic equation is that which is expressed in a form,
                                     ax² + bx + c = 0 
To write the equation in its general form, eliminate the decimal by multiplying the equation by 10. It now becomes,
                                        3x² + 50x - 70 = 0
The value of b is therefore 50 and the answer is the second choice. 
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Answer:

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Step-by-step explanation:

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Which is the vertex of x2 + 10x = -17 <br><br> (-5,-8)<br><br> (5,8)<br><br> (-5,8)<br><br> (5,-8)
ad-work [718]

Answer:

vertex = (- 5, - 8)

Step-by-step explanation:

Given a quadratic in standard form : ax² + bx + c = 0 : a ≠ 0

Then the x- coordinate of the vertex is

x_{vertex} = - \frac{b}{2a}

Given x² + 10x = - 17 ( add 17 to both sides )

x² + 10x + 17 = 0 ← in standard form

with a = 1, b = 10, c = 17, then

x_{vertex} = - \frac{10}{2} = - 5

Substitute x = - 5 into the quadratic for the corresponding value of y

y = (- 5)² + 10(- 5) + 17 = 25 - 50 + 17 = - 8

Hence vertex = (- 5, - 8)

4 0
3 years ago
What is the difference, in hours and minutes, between these times?
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Answer:

a)3hours and 15mins

b)3hours and 10mins

c)2hours and 20mins

d)8hours and 40mins

3 0
3 years ago
The bottom of a ladder must be placed 3 ft from a wall. the ladder is 12 feet long. how far above the ground does the ladder tou
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