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3 years ago

Check my answer (I chose B)

Mathematics

1 answer:

Tcecarenko [31]3 years ago

7 0

You got it wrong again it is c. you can see this because it is the only one that has two negative numbers like the expression.

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Is (2,2) a solution to this system of equations? x + 2y = 6 3x + 4y = 14

babymother [125]

Answer:

Step-by-step explanation:

(2,2) isn't but (6 1/2, -2) is because that is where they intercept

5 0

3 years ago

A page should have perimeter of 42 inches. The printing area within the page

Tamiku [17]

Overall dimensions of the page in order to maximize the printing area is page should be 11 inches wide and 10 inches long .

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

We have , A page should have perimeter of 42 inches. The printing area within the page would be determined by top and bottom margins of 1 inch from each side, and the left and right margins of 1.5 inches from each side. let's assume width of the page be x inches and its length be y inches So,

Perimeter = 42 inches

⇒ $2(x+y) = 42\\x+y = 21\\y = 21-x$

width of printed area = x-3 & length of printed area = y-2:

area = $length(width)$

$area = (x-3)(y-2)\\area = (x-3)(21-x-2)\\area = (x-3)(19-x)\\area = -x^{2} + 22x -57$

Let's find $\frac{d(area)}{dx}$ :

$\frac{d(area)}{dx}$ = $\frac{d(-x^{2}+22x-57)}{dx} = -2x +22$ , for area to be maximum $\frac{d(area)}{dx}$ = 0

⇒ $-2x+22 = 0\\2x =22\\x=11 inches$

And ,

$y = 21-x\\y = 21-11\\y = 10 inches$

∴ Overall dimensions of the page in order to maximize the printing area is page should be 11 inches wide and 10 inches long .

7 0

3 years ago

a Put the following equation of a line into slope-intercept form, simplifying all fractions. x + 3y = -24

Alex73 [517]

Here’s the answer to your question.

4 0

3 years ago

Read 2 more answers

-6n-20=-2n+4 (1-3n)<br> how do you solve it?

Leona [35]

6n−20=−2n+4(1−3n)

Simplify both sides of the equation.

−6n−20=−2n+4(1−3n)

−6n+−20=−2n+(4)(1)+(4)(−3n)(Distribute)

−6n+−20=−2n+4+−12n

−6n−20=(−2n+−12n)+(4)(Combine Like Terms)

−6n−20=−14n+4

−6n−20=−14n+4

Add 14n to both sides.

−6n−20+14n=−14n+4+14n

8n−20=4

Add 20 to both sides.

8n−20+20=4+20

8n=24

Divide both sides by 8.

8n/8 = 24/8

n=3

7 0

3 years ago

Read 2 more answers

10x+2 = 3x + 30 Find x (please)

Ganezh [65]

Answer: x=4

10x-3x=30-2
7x=28
X=4

7 0

3 years ago