Answer with explanation:
x=the number of boxes containing red pens and
y = the number of boxes containing blue pens.
The expression which describes the number of red pen and blue pen in Boxes is
= (12 x-10)+(10 y-5)
The equivalent expression are
1.By Adding like terms
=12 x +1 0 y -10 -5
=12 x +1 0 y -15
or Using Associative Property of addition of three numbers which is
⇒a+(b+c)=(a+b)+c=(a+c)+b
= 10 y +12 x -15
or
= -15 +10 y +12 x
or
= 12 x -15 +10 y
=> x² = (2.4)² + (4.8)²
=> x² = 5.76 + 23.04
=> x² = 28.8
=> x = 5.366563146
=> x = 5.4
Ans: 2nd option (5.4)
Hope this helps!
Answer:
x = 3 and 7
There are two true solutions.
Step-by-step explanation:
To solve 
, use inverse operations by squaring both sides of the equal sign.
The quadratic expression can be factored into binomials and set equal to 0 by the zero product property to find x.
(x - 3) ( x - 7) = 0
x-3 = 0 so x=3
x-7 = 0 so x=7
Now check each solution into the original equation to be sure it solve the solution and is not extraneous.
and
![3-7 = \sqrt{-4(3)+28}\\[tex]-4 = \sqrt{16}\\-4 =-4](https://tex.z-dn.net/?f=3-7%20%3D%20%5Csqrt%7B-4%283%29%2B28%7D%5C%5C%5Btex%5D-4%20%3D%20%5Csqrt%7B16%7D%5C%5C-4%20%3D-4)
[/tex]
Umm , what is this for? do you need help on anything or? lol
