what makes it irrational is the
$\sqrt{ {b}^{2} - ac } \:$
which does not change from one zero to the other. so if one root its irrational the other one also is. Answer A

8 0

3 years ago

Drag each tile to the correct box.

igor_vitrenko [27]

The answer to this statement is 2

3 0

3 years ago

at Redbox mike rents 2 DVD's and 3 games for total of $15.50. At the same time John rents 3 DVD's and 1 game for a total of $12.

charle [14.2K]

Answer: Cost of DVD is $2.95 and cost of games is $3.2.

Step-by-step explanation:

Let the cost of DVD be x

Let the cost of games be y

So, According to question,

$2x+3y=\$15.50\\\\and\\\\3x+1y=\$12.05$

Now, we will apply " Substitution Method " i.e.,

$2x=15.50-3y\\\\x=\frac{15.5-3y}{2}$

Put this value of x in second equation:

$3x+y=12.05\\\\3\times \frac{15.5-3y}{2}+y=12.05\\\\46.5-9y+2y=12.05\times 2\\\\46.5-7y=24.1\\\\46.5-24.1=7y\\\\22.4=7y\\\\\frac{22.4}{7}=y\\\\3.2=y$

Now, substitute the value of y in equation of x:

$x=\frac{15.5-3y}{2}\\\\x=\frac{15.5-3\times3.2}{2}\\\\x=\frac{15.5-9.6}{2}\\\\x=\frac{5.9}{2}\\\\x=2.95$

Hence, Cost of DVD is $2.95 and cost of games is $3.2.

6 0

3 years ago

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