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goblinko [34]
3 years ago
12

Explain why 3x – y is the same as -y + 3.1.

Mathematics
1 answer:
asambeis [7]3 years ago
3 0

Answer:

The commutative property

Step-by-step explanation:

The commutative property of addition states that a+b=b+a ( i.e you can move things around without changing the sum)

example:

3x-y=3x+(-y)=(-y)+3=-y+3x

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Drag a reason to each box to complete this proof.<br><br> If 12=13x+5 , then x = 21.
Ainat [17]
<span><span>I think the answers are:

Statement          Reason</span><span><span><span>  
<span>12=<span>13</span>x+5          </span></span>Given</span><span><span>  
<span>7=<span>13</span>x          </span></span>Subtraction Property of Equality</span><span><span> 
21 = x          </span>Multiplication Property of Equality</span><span><span> 
x = 21          </span><span>Symmetric Property of Equality 

By the way, I'm doing the same exam for Geometry as well. There's a lot of proof questions on there which I'm not good at doing for the reasoning part. If you finish the exam before I do, maybe you can message me what the answers are for some of the questions on there so I know if my answers for the questions are incorrect or not. 

Besides that, hope the answer above is correct for you. 

<em>~ ShadowXReaper069</em></span></span></span></span>
5 0
3 years ago
Read 2 more answers
A triangle has sides with lengths of 3 feet, 3 feet, and 5 feet. Is it a right triangle?
Anestetic [448]

Step-by-step explanation:

3^2 + 3^2 =5^2

9 +9 =25

18 =25

False 18 is not equal to 25.

7 0
2 years ago
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Please someone help me i’m taking a quiz and just please help
kkurt [141]

Answer:

X= 4\sqrt 3 and Y= 8

Step-by-step explanation:

i hope this helps and i hope you have a good day and I also hope you do well on your quiz

5 0
3 years ago
Pls help it due soon <br> Show workings!
mel-nik [20]

Answer:

A

Step-by-step explanation:

So the triangle rule is that the 2 smaller sides of a triangle have to have a greater sum than the largest side.

I answer a 1+2 has to be greater than 3 and its not therefore A is the answer

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Sever21 [200]

Answer:

19.1 feet

Step-by-step explanation:

Length of the ladder = 20 feet

Distance from the ladder to the wall = 6 feet

Height of the ladder on the wall = x

x² + 6² = 20²

x² = 20² - 6²

x² = 364

x = 19.1 feet (Rounded to nearest tenth)

6 0
2 years ago
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