20x^2 -11x -4 = 0 what are the solutions for this equation

Plzzzz do the right awnsers i failed the other on e plzz no du meys plzz i beg

kramer

Answer:

D. Vertex: (3, -1); zeros: (2,0), (4,0), y-intercept: (0,8)

Step-by-step explanation:

I used the desmos graphing calculator. Just plug in your equation and it should be pretty easy to find these points

8 0

3 years ago

Read 2 more answers

The revenue for a vehicle rental store is $5460. There was 208 cars and 52 vans rented. A van rents for $10 more than a car.

Darya [45]

208c + 52v = 5460
v = c + 10

where c = the price for a car rental and v = the price for a van rental.
To solve this system, use substitution; the second equation says v is equal to c + 10, so plug in "c + 10" for v in the first equation and solve for c:

208c + 52(c + 10) = 5460
208c + 52c + 520 = 5460
260c + 520 = 5460
260c = 4940
c = 19

Now that we have c, we can plug it in to the second equation to find v:

v = (19) + 10
v = 29

So, c = 19 and v = 29, meaning that
The cost of a car rental is $19 and the cost of a van rental is $29.

7 0

2 years ago

Look at the following expression. Are there any values of x for which the expression is not defined under the set of real number

almond37 [142]

The expression $\frac{4}{\sqrt{x+2} }$ is not defined at x= -2 & for all values of x less than -2 .

<u>Step-by-step explanation:</u>

We have , a given expression as $\frac{4}{\sqrt{x+2} }$ : Basically we need to find domain for this function and see for which values of x the above function is undefined . Domain of a function is the set of values of x for which the function is defined . We have a rational expression, $\frac{4}{\sqrt{x+2} }$ it's a fractional function which means denominator can be 0 . Denominator = $\sqrt{x+2}$ $\neq 0$

⇒ $\sqrt{x+2}$ $\neq 0$

⇒ $x+2\neq 0$

⇒ $x \neq -2$

So , $x \neq -2$ . Also , Denominator is a square root expression so it can't be negative inside root ∴ $x+2 > 0$ ⇒ $x> -2$ i.e. x must be greater than -2.

Therefore, the expression $\frac{4}{\sqrt{x+2} }$ is not defined at x= -2 & for all values of x less than -2 .

4 0

3 years ago

Please answer correctly<br><br> 2 + 3( 4x + 5) = -53

andre [41]

Answer:

x=-35/6

Step-by-step explanation:

2 + 3( 4x + 5) = -53

subtract 2 from both sides= 3(4x+5)=-55

divide both sides by 3 = 4x+5=-55/3

subtract both sides by 5 = 4x=-70/3

divide both sides by 4 = x=-35/6

x=-35/6 is your final answer

4 0

2 years ago

Read 2 more answers

A bottle of energy drink contains 9/10 liter. Coach Donavan buys 15 bottles. How many liters of energy drink did he buy?

Verdich [7]

To find out how many liters of energy drink Coach Donavan bought you need to multiply how much liters are in one bottle by how many bottles he bought.

9/10 x 15

9/10 x 15 is 13.5 or 13 and 1/2

So Coach Donavan bought 13 and a half liters of energy drink.

7 0

2 years ago