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3 years ago

Kalista practices the piano for at least 8 hours each week. Write an inequality for this situation

Mathematics

1 answer:

natali 33 [55]3 years ago

6 0

X≥8 shows the inequality for at least 8

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Find the sum of the geometric series.<br> 8+6+9/2+27/8+...

Tema [17]

Answer: The answer is 58. Hope this helps!

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2 years ago

Read 2 more answers

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.

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3 years ago

If h(x) = 6 - X, what is the value of (hxh)(10)?

ludmilkaskok [199]

Answer:

10 will be answer

Step-by-step explanation:

hoh(x) = x

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2 years ago

Kate wants to buy a scarf for $22. How much will the scarf cost if she buys it in Coconut Grove?

Sonja [21]

Elaborate more on your question! Include details that we don't know.

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2 years ago

Let's find what percent of the total number of quantities is the given number or quantities?

astraxan [27]

Answer:

a. 20

b. 30

c. 75

b. 600 / 2000 * 100% (Change it to same unit)

3 / 10 * 100%

30%

You can slove every question by this method.

and dont forget to give me the brainest.

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2 years ago