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Bond [772]
3 years ago
6

A pair of perpendicular lines intersect at the point (5,9). Write

Mathematics
1 answer:
maw [93]3 years ago
6 0

Answer:

The equation of the line that is perpendicular to the line that passes through the point (-4, 2) is y = -9·x/5 + 18

Step-by-step explanation:

The coordinates of the point of intersection of the two lines = (5, 9)

The coordinates of a point on one of the two lines, line 1 = (-4, 4)

The slope of a line perpendicular to another line with slope, m = -1/m

Therefore, we have;

The slope, m₁, of the line 1 with the known point = (9 - 4)/(5 - (-4)) = 5/9

Therefore, the slope, m₂, of the line 2 perpendicular to the line that passes through the point (-4, 4) = -9/5

The equation of the line 2 is given as follows;

y - 9 = -9/5×(x - 5)

y - 9 = -9·x/5 + 9

y =  -9·x/5 + 9 + 9

y = -9·x/5 + 18

Therefore, the equation of the line that is perpendicular to the line that passes through the point (-4, 2) is y = -9·x/5 + 18.

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The length of a rectangle is 1 inch less than twice the width. the area is 21 inches^2 what is the length?
ale4655 [162]
Hi.

Formula for area: A = 2l + 2w, where l is the length and w is the width.

Given information:
• l = 2w - 1
• A = 21 in^2

We can plug in our values accordingly and solve for w.

A = 2l + 2w
21 = 2(2w - 1) + 2w
21 = 4w - 2 + 2w
23 = 6w - 2
23 = 6w
3.83 = w

Plug 3.83 for w into 2w - 1 to find length.

2(3.83) - 1
7.66 - 1
6.66

Finally, check your work by plugging your values into the original equation.

21 = 2(6.66) + 2(3.83)
21 = 13.32 + 7.66
21 = 20.98

Answer:
The length is approximately 6.66 inches.
4 0
3 years ago
Find the surface area of the cylinder.Round your answer to the nearest tenth.
Delvig [45]

Answer:

The answer is 3438.16 i think

Step-by-step explanation:

6 0
3 years ago
Molly's favorite store is running a great deal. All products are marked down 20% from their original
Black_prince [1.1K]

Answer:

  • D. 0.8p(1p-0.2p)

Step-by-step explanation:

<u>If p is the original price, the markdown price is:</u>

  • p - 20% =
  • p - p(20/100) =
  • p - 0.2p =
  • 0.8p

<u>Now, another 20% off:</u>

  • 0.8p - 20% =
  • 0.8p - 0.8p(20/100) =
  • 0.8(p - 0.2p) =
  • 0.64p

<u>Answer choices:</u>

  • A. 0.2(1p-0.2p)
  • B. 0.6p
  • C. (1p-0.2p)-0.2p
  • D. 0.8p(1p-0.2p)

Correct one is D

8 0
3 years ago
What is the solution to the system?
sergey [27]
The answer is in my attachment

6 0
3 years ago
the jedi have a weapon that can shoot a projectile 20 miles. find the area that the projectile can land in.
kifflom [539]

Answer:

The area he can cover with that weapon is 1,256 miles².

Step-by-step explanation:

Assuming that the Jedi won't move and that he can shoot in every direction, he'd be shooting at a circle with a radius of 20 miles. Therefore the are that he can cover with that weapon is the area of the circle, which is shown below:

area = pi*r²

area = 3.14*(20)²

area = 3.14*400

area = 1,256 miles²

The area he can cover with that weapon is 1,256 miles².

5 0
3 years ago
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