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Stells [14]
3 years ago
13

F(x) = -7x^2+8x+2 what is the value of the discriminant of f

Mathematics
2 answers:
yan [13]3 years ago
5 0

Answer:

120

Step-by-step explanation:

The discriminant can be written as an expression: b² - 4ac.

We know that a = -7, b = 8, c = 2, since the function f(x) = -7x² + 8x + 2 is in standard form: ax² + bx + 2.

Now let's evaluate the discriminant:

b² - 4ac

= 8² - 4(-7)(2)    (Simplify)

= 64 - 4(-14)

= 64 + 56

= 120

Murrr4er [49]3 years ago
3 0

Answer:

D = 120,    there are 2 real roots for F(x)

Step-by-step explanatU

using the

formula  D = b^2 - 4ac  for discriminant

D =  8^2  - 4*(-7)*2

D = 64  + 56  =  120

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How can you use number patterns to find the least common multiple of 120 and 360?
Maslowich
Since 360 is a multiple of 120 then the answer is automatically 120. 120,240,360,480,600,720,840, and 960.
5 0
3 years ago
What is the inverse of the equation y = 3x + 2?
Anna71 [15]

Answer:   y = (x-2)/3

This is equivalent to y = (1/3)x - 2/3

=================================================

To get this answer, we need to swap x and y in the original equation. Then solve for y to get the inverse.

y = 3x+2

x = 3y + 2 ... x and y swapped

x-2 = 3y

3y = x-2

y = (x-2)/3

y = x/3 - 2/3

y = (1/3)x - 2/3

This final equation has slope 1/3 and y intercept -2/3

4 0
3 years ago
Find the value of in the triangle shown below.<br> 13<br> 12<br> X
Lynna [10]

Answer:

D) 5

Step-by-step explanation:

a²+b²=c²

12²+b²=13²

144+b²=169

b²=169-144

b²=25

b=√25

b=5

5 0
3 years ago
What is the answer to x-5y=30 so I can graph it?
Dahasolnce [82]

Answer:

x + 5y = 30

x + 5(0) = 30

x1 = 30    y1 = 0

x + 5y = 30

1(0) + 5y = 30

y2 = 6    x2 = 0

(x1,y1) and (x2,y2)

(30,0) and (0,6)

Step-by-step explanation:

3 0
2 years ago
Solve the equation for theta (0°≤theta&lt;360°)<br><br>2 sin theta = 1​
Oduvanchick [21]

Answer:

30 degrees

Step-by-step explanation:

To figure out theta is using a bit of simple trigonometry.

2sin(theta) = 1

= sin(theta) = 0.5

Using arcsin (sin^-1) we can isolate x

x = arcsin(0.5)

x = 30

4 0
2 years ago
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