Answer:
Its good and yours? ill try to answer ur question i might not know lol
Step-by-step explanation:
Answer:
The answers are:
a)
is FALSE.
b)
is TRUE.
c)
is FALSE.
d)
is FALSE.
e)
is FALSE.
f)
is TRUE.
g)
is FALSE.
h)
is FALSE.
Step-by-step explanation:
We can show that the FALSE statement are, in fact, false finding an example where the equality fails.
a) Take x=2 and y=3 and notice that (2+3)² = 25, while 2²+3²=4+9=13.
b) (x+y)² = (x+y)(x+y)=x²+xy+xy+y² = x² +2xy +y².
c) Take x=2 and y=3 and notice that 2/(2+3) = 2/5 which is different from 1/3.
d) Take x=2 and y=3 and notice that 2-(2+3) = 2-5=-3 which is different from 3. Recall that x-(x+y) = x-x-y=-y.
e) Take x=-2, and notice that [tax]\sqrt{(-2)^2} = \sqrt{4} = 2[/tex] which is different from -2.
f) The previous example illustrate why this is true.
g) Take x=1, and notice that
which is different from 3.
h) Take x=2 and y=3 and notice that 1/(2+3)=1/5 and 1/3+1/2 = 5/6.
Ah ok The property is
"The Addition Property of Equality"
Answer:
x = 36
Step-by-step explanation:
Rearrange the equations before solving simultaneously
4y = -5x - 28
2y = 7x - 24
now subtract
4y - 2y = 2y
5x - 7x = -2x
-28 - - 24 = -4
put these values together.
2y - 2x - 4.
2y = 2x + 4
y = 2x + 4 / 2
y = x + 2
substitute this into one of the 1st equations in the question.
5x = -4(x + 2) + 28
5x = -4x + 8 + 28
5x = -4x + 36
9x = 36
x = 4.
D
7•4 =28, -5•0 =0... 28+0=28