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Ivenika [448]
3 years ago
7

30x+18y=486 solve for y and x

Mathematics
1 answer:
Umnica [9.8K]3 years ago
4 0
You can't solve for an exact answer for both x and y since there would be two solutions, think of this as a linear equation
30x+18y=486-30x
-30x
18y=486-30x
/18. /18
y=27-5x/3

30x+18y=486
-18y. -18y
30x=486-18y/30
/30.
x=81/5-3y/5
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Regis leans a 10-foot ladder against a wall. The base of the ladder makes a 65 angle with the ground.
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The distance, In feet, from the base of the ladder to the base of the wall is 4.2 ft.

He needs to move the ladder 0.1 ft closer to the base of the building.

The situation forms a right angle triangle.

<h3>Right angle triangle</h3>

Right angle triangle has one of its angles as 90 degrees. The sides and angle can be found using trigonometric ratios.

The length of the ladder is the hypotenuse of the triangle formed. Therefore, the distance, In feet, from the base of the ladder to the base of the wall can be calculated as follows;

cos 65° = adjacent / hypotenuse

cos 65° = d / 10

d = 10 × 0.42261826174

d = 4.22618261741

d = 4.2 ft

She needs to move the ladder so it reached a window 9.6 feet above the ground. Therefore, the distance from the base of the ladder and the wall is as follows;

cos 65 = d / 9.6

d = 9.6 × 0.42261826174

d = 4.05696

d = 4.1

Therefore, he needs to move the ladder 0.1 ft closer to the building.

learn more on right angle triangle here: brainly.com/question/14988069

8 0
3 years ago
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Step-by-step explanation:

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<span>Measure of angle AED is 28°


I hope I helped


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dimaraw [331]

Answer:

6840

Step-by-step explanation:

Well we know there's 24 hours in a day so dividing that by 1440 we get 60. Now we know that it consumes 60 watts ever hour. so now we just have to figure out how many hours there are and times that by 60. So there are 96 hours in 4 days plus 28=114. So times that by 60 ( watts) 114×60=6840

So that's your awnser.

Hope this helps!! If so please mark brainliest and rate/heart to help my account if it did!!

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To fence in 2 cows, josie used 64 feet of fence. for 3 cows, she used 96 feet of fence, and for 4 cows, she used 128 feet of fen
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The answer is 192 feet
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