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Lorico [155]
3 years ago
12

Which of the following expressions is incorrect?

Mathematics
1 answer:
iragen [17]3 years ago
3 0
The third expression is wrong
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A ladder 25 feet long is leaning against the wall of a house. The base of the ladder is pulled away from the wall at a rate of 2
Soloha48 [4]

last one. i can do the first part. put x = distance from top of ladder to the floor, y = distance from base of ladder to the wall (draw a picture) then pythagoras sez

<span><span>x2</span>+<span>y2</span>=25</span>

calculus says

<span>2x<span>x′</span>+2y<span>y′</span>=0</span>

and you are told that

<span><span>y′</span>=2</span>

so you know

<span>2x<span>x′</span>+4y=0</span>

or

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5 0
3 years ago
Solve for y.<br> -38 = 7v+17 – 12v
iren2701 [21]

Answer:

<h2>v = 11</h2>

Step-by-step explanation:

-38=7v+17-12v\qquad\text{subtract 17 from both sides}\\\\-38-17=7v+17-17-12v\qquad\text{combine like terms}\\\\-55=-5v\qquad\text{divide both sides by (-5)}\\\\\dfrac{-55}{-5}=\dfrac{-5v}{-5}\\\\11=v\to v=11

6 0
3 years ago
Which equation would demonstrate the commutative property?
Yanka [14]

Answer:

b. 37 • 26 = 26 • 37

commutative property states that the change in the order of numbers in an addition or multiplication operation does not change the sum or the product.

3 0
2 years ago
Alana walks 5/6 of a mile to a park. Dane walks 1/2 of the distance Alana walks to get to the park. How far does Dane walk to th
Andru [333]

Hi There!

Find a fraction that can be cut in half,

5/6 = 10/12

Dane walks half the distance,

Half of 10/12 is 5/12

Answer: Dane walks 5/12 of a mile to a park.

Hope This Helps :)

6 0
3 years ago
Help me with math pls ❤️ it will mean a lot to me.
Keith_Richards [23]
7/6

Hope this helps!!!!
6 0
3 years ago
Read 2 more answers
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