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Mekhanik [1.2K]
3 years ago
8

What is the value of the discriminant for the quadratic equation –3 = –x2 + 2x?

Mathematics
2 answers:
Reptile [31]3 years ago
3 0

Answer:

-8

Step-by-step explanation:

●Answer attached●

☆Hope it helps☆

Hitman42 [59]3 years ago
3 0

Answer:

its option one

Step-by-step explanation:

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write a rational expression involving one variable for which the excluded values are -4 and -7. Please Help!!!!!!
lions [1.4K]

Answer:

See below.

Step-by-step explanation:

Values are excluded if they make the denominator zero, so one rational expression could be:

(x^2 - 9) /  (x + 4)(x + 7)

- when x = -4 or -7 then the denominator is zero so the values of the function is undefined for these values.

3 0
3 years ago
Nine less than three times a number is greater than forty
pentagon [3]
Start with an equation.
Nine less... so -9
3 times a number = 3x
Greater than 40 is >40

So put together is 3x-9>40
When solving I imaging the greater than sign as an equal sign. Less confusing.
3x-9=40
3x=49
x>49/3
7 0
3 years ago
An athlete knows that when she jogs along her neighborhood​ greenway, she can complete the route in 10 minutes. It takes 20 minu
IgorLugansk [536]

Answer:

10 miles per hour.

Step-by-step explanation:

Let x represent athlete's walking speed.

We have been given that her jogging rate is 5 mph faster than her walking​ rate, so athlete's jogging speed would be x+5 miles per hour.

\text{Distance}=\text{Rate}\cdot \text{Time}

10 minutes = 1/6 hour.

20 minutes = 1/3 hour

While walking, we will get D_{\text{walking}}=x\frac{\text{miles}}{\text{hour}}\cdot \frac{1}{3}\text{hour}

D_{\text{walking}}=\frac{x}{3}

While jogging, we will get D_{\text{jogging}}=(x+5)\frac{\text{miles}}{\text{hour}}\cdot \frac{1}{6}\text{hour}

D_{\text{jogging}}= \frac{(x+5)}{6}

Since athlete is covering same distance while walking and jogging, so we can equate both expressions as:

\frac{x}{3}=\frac{x+5}{6}

Cross multiply:

6x=3x+15

6x-3x=15

3x=15

\frac{3x}{3}=\frac{15}{3}\\\\x=5

Therefore, athlete's walking speed is 5 miles per hour.

Jogging speed: x+5\Rightarrow 5+5=10

Therefore, athlete's jogging speed is 10 miles per hour.

3 0
3 years ago
G(x)=17-2/3x;g(6)<br><br> please help me i only have 5 mins left
marishachu [46]

Answer:

13

Step-by-step explanation:

17 - 2/3(6)

17 - 4

13

sub in 6 for x to find g(6) instead of g(x)

4 0
3 years ago
The number 3 help now please
PSYCHO15rus [73]
-6, all of them are the absolute value of 6 or just 6, -6 isn't equivalent to 6. 
7 0
3 years ago
Read 2 more answers
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