Answer:
x = 8, y = 1
Step-by-step explanation:
Given that the triangles are similar then the ratios of corresponding sides are equal, that is
=
( cross- multiply )
4y = 4 ( divide both sides by 4 )
y = 1
Also
=
( cross- multiply )
x = 8
PLEASE help, what is 88x+59+(55*74)
1 answer:
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Answer:
An irrational number can never be represented precisely in decimal form.
Step-by-step explanation:
<em>A number can be precisely represented in decimal form if you can give a rule for the construction of its decimal part,</em>
for example:
2.246973973973973... (an infinite tail of 973's repeated over and over)
7.35 (a tail of zeroes)
If this the case, then the number is a RATIONAL NUMBER, i.e, the QUOTIENT OF TWO INTEGERS.
Let's show this for the first example and then a way to show the general situation will arise naturally.
Suppose N = 2.246973973973...
You can always multiply by a suitable power of 10 until you get a number with only the repeated chain in the tail
for example:
1)
but also
2)
Subtracting 1) from 2) we get
Now, the infinite tail disappears
But
We have then
999000.N=226747
and
We do not need to simplify this fraction, because we only wanted to show that N is a quotient of two integers.
We arrive then to the following conclusion:
If an irrational number could be represented precisely in decimal form, then it would have to be the quotient of two integers, which is a contradiction.
So, an irrational number can never be represented precisely in decimal form.
Answer:
x = -44/13
y = -65/13
Step-by-step explanation:
Using matrix form means using the crammers rule
The matrix form of the expression is written as;
AX = B
taking the determinant of A;
|A| = 8(1) - 5(-1)
|A| = 8 + 5
|A| = 13
After replacing the first row with the column matrix;
|Ax| = 9(-1)-5(7)
||Ax| = -9 - 35
|Ax| = -44
x = |Ax|/|A|
x = -44/13
similarly for y
|Ay| = 8(7)+9
|Ay| = 56+9
|Ay| = 65
y = |Ay|/|A|
y = -65/13