Answer:
1) Let's consider the first case with the number 0 the oppose is also 0 and we have that 0-0=0 so then applies
2) Now let's consider any real number a no matter positive or negative we will have that:
Or in the other case:
So then we can conclude that the expression is a general rule and is true
Step-by-step explanation:
For this case we can verify if the following expression is true or false:
The sum of x and it’s opposite is always zero?
If we want to proof this we need to show that for any number is true.
1) Let's consider the first case with the number 0 the oppose is also 0 and we have that 0-0=0 so then applies
2) Now let's consider any real number a no matter positive or negative we will have that:
Or in the other case:
So then we can conclude that the expression is a general rule and is true
Hey there!
<h2>
ANSWER: 
</h2><h2>
EXPLANATION:</h2>
Ratio of 
If you want to get the ratio, you should multiply the numerator(7) and denominator(3) by 2.
So your answer is:
Hope this helps!
Answer: 4:20
Step-by-step explanation:
60 lbs can be divided into three groups, in this case the bags of sand, so 60 divided by 3 is 20.
Now you have the 8 lbs left. It gets divided into two groups/bags so you would do 8 divided by 2 is 4.
Then for your ratio it is cement to sand which is 4:20. You can write the ratio however way you want or what is required by the question.(fraction bar, ‘to’, or colon ‘:’ )
Hope this helps!
Answer:
Step-by-step explanation:
Statements Reasons
1). ∠CXY ≅ ∠BXY 1). Given
2). ∠CAX ≅ ∠BAX 2). Given
3). AC ≅ AB 3). Given
4). AX ≅ AX 4). Reflexive property
5). ΔAXC ≅ ΔAXB 5). SAS property of congruence
6). CX ≅ BX 6). CPCTC
7). XY ≅ XY 7). Reflexive property
8). ΔYXB ≅ ΔYXC 8). SAS property of congruence
9). ∠XCY ≅ ∠XBY 9). CPCTC
