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3 years ago

I am back on you tube . my channel name - superio s // subscribe and leave a comment

Mathematics

1 answer:

Elena-2011 [213]3 years ago

4 0

Answer:

okayyyyyyyyyyyyyyyyy

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For what value of k is there one solution to the given quadratic equation (k+1)x²+4kx+2=0.

andriy [413]

Answer:

If $k = 1$ or $k = -\frac{1}{2}$ , there is only one solution to the given quadratic equation.

Step-by-step explanation:

Given a second order polynomial expressed by the following equation:

$ax^{2} + bx + c, a\neq0$

This polynomial has roots $x_{1}, x_{2}$ such that $ax^{2} + bx + c = (x - x_{1})*(x - x_{2})$ , given by the following formulas:

$x_{1} = \frac{-b + \sqrt{\bigtriangleup}}{2*a}$

$x_{2} = \frac{-b - \sqrt{\bigtriangleup}}{2*a}$

$\bigtriangleup = b^{2} - 4ac$

The signal of $\bigtriangleup$ determines how many real roots an equation has:

$\bigtriangleup > 0$ : Two real and different solutions

$\bigtriangleup = 0$ : One real solution

$\bigtriangleup < 0$ : No real solutions

In this problem, we have the following second order polynomial:

$(k+1)x^{2} + 4kx + 2 = 0$ .

This means that $a = k+1; b = 4k; c = 2$

It has one solution if

$\bigtriangleup = 0$

$b^{2} - 4ac = 0$

$16k^{2} -8(k+1) = 0$

$16k^{2} - 8k - 8 = 0$

We can simplify by 8

$2k^{2} - k - 1 = 0$

The solution is:

$k = 1$ or $k = -\frac{1}{2}$

So, if $k = 1$ or $k = -\frac{1}{2}$ , there is only one solution to the given quadratic equation.

4 0

3 years ago

Help pls my math teacher is rude

Digiron [165]

Answer:

2.25 or 2 1/4 pounds

Step-by-step explanation:

if you add them all up (I converted them to decimals when adding) you get 13.5 or 13 1/2 if your using fractions, then you divide that by 6 because thats how many jars there are and you get 2.25 or 2 1/4

5 0

3 years ago

Can somebody please help me I will mark u brilliant

CaHeK987 [17]

Answer: 14

Step-by-step explanation:

Since they said find the mean

You are suppose to add up all the numbers then divide it by how many numbers are there.

3 0

2 years ago

Read 2 more answers

The seconds hand of an analog clock completes an entire rotation in 60 seconds, and the length of the seconds hand is 5 inches.

zaharov [31]

Answer:

195

Step-by-step explanation:

3 x 60 = 180

180 + 15

195

5 0

2 years ago

Read 2 more answers

A school purchased T-shirts to sell for a fundraiser. The school spent $684 for the T-shirts. Each T-shirt will sell for $12.

Setler79 [48]

Answer:

If the question is How many T-Shirts does the school have, it will be 57 T-Shirts

Step-by-step explanation:

684 divided by 12 is 57

8 0

2 years ago

I am back on you tube . my channel name - superio s // subscribe and leave a comment​

I am back on you tube . my channel name - superio s // subscribe and leave a comment