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3 years ago

If k = -3 what is the value of k + (2k - 10) ? A. –19 B. –7 C. 1 D. –14

Mathematics

1 answer:

gladu [14]3 years ago

3 0

Answer:

Step-by-step explanation:

We have the expression $k+(2k-10)$

We want to find the value when k is -3. So, substitute -3 for k and evaluate:

$\Rightarrow (-3)+(2(-3)-10)$

Multiply:

$=-3+(-6-10)$

Subtract:

$=-3+(-16)$

Add:

$=-19$

Therefore, our answer is A.

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What is the domain of the function f(x) =x+1/<br> X^2-6x+8?

SpyIntel [72]

Answer:

The domain of the function is all real values of x, except $x = 4$ and $x = 2$

Step-by-step explanation:

We are given the following function:

$f(x) = \frac{x+1}{x^2-6x+8}$

It's a fraction, so the domain is all the real values except those in which the denominator is 0.

Denominator:

Quadratic equation with $a = 1, b = -6, c = 8$

Using bhaskara, the denominator is 0 for these following values of x:

$\Delta = (-6)^2 - 4(1)(8) = 36-32 = 4$

$x_{1} = \frac{-(-6) + \sqrt{4}}{2} = 4$

$x_{2} = \frac{-(-6) - \sqrt{4}}{2} = 2$

The domain of the function is all real values of x, except $x = 4$ and $x = 2$

8 0

3 years ago

Lily bought 6 skirts and 5 coats for a total of $452.62. If Lily's

PSYCHO15rus [73]

Let x = cost of one skirt

Let y = cost of one coat.

We need to construct a system of equations to help us solve this problem.

Lily: $452.62 = 6x + 5y

Sis: $289.36 = 3x + 5y.

Let's solve this by elimination. Multiply the second equation by -1

Lily: $452.62 = 6x + 5y

Sis: -$289.36 = -3x + -5y. Add the equations together.

$163.26 = 3x. Divide each side by 3.

$54.42 = x. Plug this into one of our original equations.

$452.62 = 6(54.42) + 5y. Multiply 6 by 54.42

$452.62 = 326.52 + 5y. Subtract 326.52 from each side.

$126.1 = 5y. Divide each side by 5

$25.22 = y.

One coat costs $25.22

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3 years ago

Learning Task 2: Solve each problem using the application of LCM and

jenyasd209 [6]

Answer:

Each pupil get 6 sheet

Step-by-step explanation:

Given:

Number of green sheet = 36

Number of blue sheet = 42

Find:

Common factor

Computation:

36 = 6 x 6

42 = 6 x 7

So, 6 is a common factor

Each pupil get 6 sheet

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3 years ago

A glass company ships 470 glass ornament. each box five ornaments. how many boxes will the company need

Nonamiya [84]

The equation would be
5x= 470

470/5 = X

X = 94

Answer=94

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3 years ago

I make 42,566 a year. I much I make a year

Bumek [7]

You make 42566 a year
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3 years ago