Answer:
x = 0
Step-by-step explanation:
= 2 - x ( square both sides to clear the radical )
x + 4 = (2 - x)² ← expand using FOIL
x + 4 = 4 - 4x + x² ( subtract x + 4 from both sides )
0 = x² - 5x ← factor out x from each term
0 = x(x - 5)
equate each factor to zero and solve for x
x = 0
x - 5 = 0 ⇒ x = 5
As a check
substitute these values into the equation and if both sides are equal then they are the solutions
x = 0
left side = = = 2
right side = 2 - 0 = 2
then x = 0 is a solution
x = 5
left side = = = 3
right side = 2 - 5 = - 3 ≠ 3
then x = 5 is an extraneous solution
Answer:
<em>75-9d</em>
Step-by-step explanation:
<em>Hello,</em>
<em>The Answer to the question is 75-9d let me explain why,</em>
<em />
<em>you are asking, how much money is leftover. For me to get that I need to know that for every book it cost "d" dollars.</em>
<em>You know you have $75, and you need 9 books, we don't know how much they cost but we don't really need to. </em>
<em>75 - 9d</em>
<em>75 is the total. You need to subtract it by how many books your buying, 9.</em>
The books are d amount of dollars, so we put 9d so that we know that for every 1 book it cost d amount so technically 9 is the amount of books times d, how much 1 book costs
<em>Hope you can understand, I was having some trouble finding a way to explain it so my bad.</em>
<em />
<em>Also, I haven't done that in a while so sorry if I'm wrong</em>
<u><em>-Nova</em></u>
Answer:
y=22
Step-by-step explanation:
set 6y-3 equal to 129 and then solve
Answer:
what is it ?
Step-by-step explanation: