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Deffense [45]
3 years ago
6

PLEASE HELP ME I WILL MARK BRAINLIST!!!!

Mathematics
1 answer:
elixir [45]3 years ago
5 0

Answer: A

Step-by-step explanation: The slope of perpendicular lines is opposite reciprocal. In this case the slope would be 4/3. Plug in for x and y, you get -7 for b.

  • y = mx +b
  • 9 = 4/3 (12) + b
  • 9 = 16 + b
  • -7 = b

Rewrite the equation --> y = 4/3x - 7

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Solve the inequality 1/3(x-6)>2
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Answer:

x>12

Step-by-step explanation:

1/3(x-6)>2

distribute 1/3

1/3x-2>2

add 2 to both sides

1/3x>4

multiply both sides by 3

x>12

3 0
3 years ago
Determine the value of x in this polygon.
Nata [24]

Answer:

X24

Step-by-step explanation:

6 0
3 years ago
What is the solution set of the given system?
AVprozaik [17]

What is the system? (Is there supposed to be an image?)

3 0
3 years ago
Giving brainiest+points need explanation on this one my answer is 25 is it right?
natka813 [3]
Known facts:
A line shaft rotating at 250 rpm, a grinder shaft that turns at 1200 rpm diameter of grinder pulley is 5 inches.

1. Proportion equation
350/1200 = 5/x

2. Cross multiply 
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x=(1200*5)/250 = (24*50*5)/(5*50) = 24
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8 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
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