Examine the system of equations. 2x − 4y = 6, x − 2y = 3 how many solutions does this system of equations have?
none
one
infinity many

infinitely

Step-by-step explanation:

Just did it

answer:

20.25

Step-by-step explanation:

Question: What is 25 percent of 81?

Percentage solution with steps:

Step 1: Our output value is 81.

Step 2: We represent the unknown value with $x$

.

Step 3: From step 1 above,$81=100\%$

.

Step 4: Similarly, $x=25\%$

.

Step 5: This results in a pair of simple equations:

$81=100\%(1)$

.

$x=25\%(2)$

.

Step 6: By dividing equation 1 by equation 2 and noting that both the RHS (right hand side) of both

equations have the same unit (%); we have

$\frac{81}{x}=\frac{100\%}{25\%}$

Step 7: Again, the reciprocal of both sides gives

$\frac{x}{81}=\frac{25}{100}$

$\Rightarrow x=20.25$Therefore, $25\%$ of $81$ is $20.25$