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Alex73 [517]
3 years ago
13

What is the value of b2 - 4ac for the following equation? 2x 2 - 2x - 1 = 0

Mathematics
1 answer:
Orlov [11]3 years ago
6 0
For you to make an equation a quadratic equation, you need everything to be on one side, so you add one to both sides. 

<span>2x^2 + 3x + 0=0 </span>

<span>a=2, b=3, c=0 </span>

<span>b^2-4ac (In the next step just plug in your variables) </span>

<span>3^2 - 4(2)(0) </span>

<span>9 - 8(0) </span>

<span>9 - 0 </span>

<span>Your answer=9</span>
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Graph the image of the given triangle under a dilation with a scale factor of 1/3 and center of dilation (0, 0) .
Free_Kalibri [48]
The given triangle has vertices (0,0), (0,9) ,(-6,0)

After a dilation with a scale factor of \frac{1}{3} about the origin , the  image triangle will have vertices

(0,0), (0,3), (-2,0)

See attachment for graph

6 0
3 years ago
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SOMEONE HELP FAST ( it's due today )
Veronika [31]

Answer:

i. Minimum is 343 square feet

ii. Maximum is 360 square feet

Step-by-step explanation:

The dimension of the rectangular garden plot is 12 feet by 28.6 feet.

1. The minimum possible area can be determined by;

area of a rectangle = length x width

                               = 28.6 x 12

                               = 343.2

The minimum possible area is about 343 square feet.

2. The maximum value can be determined by;

             28.6 ≅ 30.0 (1 sf)

area of a rectangle = length x width

                                = 30 x 12

                                = 360

The maximum possible area is about 360 square feet.

4 0
3 years ago
Pablo works as a tutor and gets paid 6 an hour complete the table and graph to showthis relationship
Lina20 [59]

Answer:  Total Pay = 6X

Step-by-step explanation:  This assunes the question wants to know how to calculate Pablo's earning for a given tutoring time.

Pablo's rate is $6/hr.  Set X to the number of hours of tutoring.  Pablo's total pay would be:

Total Pay = 6X

6 0
3 years ago
An angle measures 39.2° less than the measure of its complementary angle. What is the measure of each angle?
pochemuha

Answer: The measures of the angles are 64.6 degrees and 25.4 degrees.

Step-by-step explanation:

Complementary angles add up to 90 degrees.

x can be one angle, and (x-39.2) can be the other

x + (x-39.2) = 90

2x - 39.2 = 90

add 39.2 to both sides

2x = 129.2

divide each side by 2

x = 64.6

find the measure of the other angle

64.6-39.2 = 25.4

The measures of the angles are 64.6 degrees and 25.4 degrees.

8 0
3 years ago
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Stells [14]
Okay, since she started with $100, then that would be a constant. So the function would start off with f(x)=?+100. Okay, now since she is depositing $25 PER month, then the 'x' varibale would be per month. So the function would be f(x)=25x+100. Now since you want to know the rate of change, just insert the x value as the month. For example, you want to know how much money she has on the 4th month, so you would substitute 4 with x --> f(x)=25(4)+100, which is f(x)=200
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3 years ago
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