Ifx=3, y=-4, z=-7
Verify: xx(y+z)=(xxy)+(x×z)
Write also the name of the property used.
(Hint: Solve L.H.S and R.H.S, Compare)
plz tell the ones who will tell correct i will mark him or her as brainliest
Answers
Answer:
Proof for x+y=x+y
Simply you can substitute the values of x&y and can prove it.
LHS=x+y
=3/7 +5/4
=47/28
RHS=x+y
=3/7+5/4
=47/28
, but with these kind of equations, you can never be sure!
Simply by the laws of equations, (Sorry I can’t remember the name!) your goal is to isolate the x and the y variables as much as possible. Therefore, the order of operations states exponents come first with the last numbers.
(2x-y)^2=(2x-y)(2x-y)
This is actually quite similar to FOIL, which I enjoyed learning! 2x * 2x = (4x)(4x)=16x(x). Right now, we have 16x(x). Now, we have to multiply “-y and
How do you verify x+y=y+x for the following values of x and y, x= 5/7y,=-3/2?
L.H.S.=x+y= 5/7+ (-3/2)
=5/7 - 3/2
[Adding any number to a negative number results in subtraction between the two numbers
When you add a positive number, you move to the right on the number line.
When you add a negative number, you move to the left on the number line.]
Hence, x+y =10/14 - 21/14 [Taking L.C.M within the denominators]
x+y = -11/14
Similarly,
R.H.S.=y+x= (-3/2) + 5/7
=-21/14+10/14 [Taking L.C.M within the denominators]
y+x =-11/14
Thus, we can say that x+y=y+x when x=5/7 and y= (-3/2)
If x+y=5 and x−y=2 what does (x−y)(x2−y2)?
So, with the system of equations:
x+y = 5
x-y=2
What you first want to do is find out what x and y are. The easiest way to do this is to set both equations equal to x, which will give you:
x=5-y
x=2+y
Then, you can just substitute x for one of the expressions in order to set them both equal to each other as such:
2+y=5-y
Now you can simply solve for y:
2+2y=5
2y=3
y=3/2
Then, plug y into either one of the original
Thanks.
What is the value of xy if 2x+y=10?
With this much amount of information given, x and y could be a lot of different numbers. For example, x and y could be 5 and so (2*5) +5 = 10 or x could be 4 and y could be 2 and so (2*4) +2 = 10.
To find the solution, either another formula, relating to this, must be given. Then, you can solve it by using simultaneous equations. If it is a word problem, then you must be able to create another equation with the information given or there is a totally different way of approaching the problem.
Don’t give up! Keep on trying to find the solution! Good Luck!
What will be the remainder of (5m+1)(5m+3)(5m+4)/5?
(5m+1)≡1mod(5)
(5m+3)≡3mod(5)
(5m+4)≡4mod(5)
⇒(5m+1)(5m+3)(5m+4)≡(1)(3)(4)mod(5)
⇒(5m+1)(5m+3)(5m+4)≡12mod(5)
⇒(5m+1)(5m+3)(5m+4)≡2mod(5)
If 1/3 of a number is 6 more than 3/5 of the number, what is 1/4 of the number?
The only tricky part is writing down this as an equation:
1/3 * x = 3/5 * x + 6
Then you just solve it:
(1/3 - 3/5) x = 6
(5/15 - 9/15) x = 6
(-4/15)x = 6
x = -90/4 = -22.5
1/4 of