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3 years ago

Question 2 (10 points)

Mathematics

2 answers:

kirill [66]3 years ago

7 0

Answer:

(k-6) (k+4)

Step-by-step explanation:

K^2 - 2k - 24

Factor

What 2 numbers multiply to 24 and add to -2

-6*4 = -24

-6+4 = -2

( k-6) (k+4)

Alenkasestr [34]3 years ago

5 0

Answer:

(k - 6)(k + 4)

Step-by-step explanation:

k^2 - 2k - 24

(k - 6)(k + 4)

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2x+3y=1 and y=-2 - 9 solve using linear combination method. Please explain steps.

kaheart [24]

Answer:

$x=17$

Step-by-step explanation:

$2x+3y=1$

$y=-2-9$

In order to combine these two equations, an idea you need to keep in mind is finding a way of setting these equations as equal to each other. I saw that each equation shared a common value, $y$ . In this case, we need to isolate $y$ in the first equation so that both equations $=y$ .

$2x+3y=1$

$3y=-2x+1$

$\frac{3y}{3}=\frac{-2x+1}{3}$

$y=-\frac{2}{3}x+\frac{1}{3}$

With this, we now know that both $-2-9$ and $-\frac{2}{3}x+\frac{1}{3}$ are equal to $y$ , so we can set them equal to each other.

$y=-\frac{2}{3}x+\frac{1}{3}$

$y=-11$

$-\frac{2}{3}x+\frac{1}{3}=-11$

Reply to this if anything I'm saying or doing is confusing in any way, or if you find a mistake. :) Solve for $x$ .

$-\frac{2}{3}x+\frac{1}{3}=-11$

$-\frac{2}{3}x=-11-\frac{1}{3}$

$-\frac{2}{3}x =-\frac{33}{3}-\frac{1}{3}$

$-\frac{2}{3}x =-\frac{34}{3}$

$-\frac{2}{3}x(-\frac{3}{2})=-\frac{34}{3}(-\frac{3}{2})$

$x=\frac{102}{6}=17$

$x=17$

Hopefully this answer is correct AND makes sense in terms of how I achieved it. Again, reply to this with any questions or mistakes I made and I'll do my best to answer or fix them.

4 0

3 years ago

At the beginning of the year Jason had $80 in his savings account. Each month he added $15 to his account. Write in expression f

zmey [24]

So what you do is theres 12 months so multiple that by 15 and get 180 then what you do is what time 80 equals 180 and thats your answer

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4 years ago

If a 20 in. by 30 in. window has a wooden frame 4 inches wide surrounding it, what is the total area of the window and frame?

Crank

I believe the formula is lxwxh if so it's 20 x 30 x 4= 2400 i hope this helped

7 0

3 years ago