Subtract 30, then factor the equation.
... x² = 30
... x² - 30 = 0
... (x -√30)(x +√30) = 0
By the zero product rule, the solutions are values of x that make a factor be zero.
... x - √30 = 0 . . . . the first factor is zero
... x = √30
... x + √30 = 0 . . . . the second factor is zero
... x = -√30
The solutions are . . .
... x = ±√30 . . . . . matches your 3rd choice
Answer:
6 ft
Step-by-step explanation:
Let the width = w
Then the length = 4w - 3
perimeter = 2(length + width)
perimeter = 2(4w - 3 + w)
perimeter = 2(5w - 3)
perimeter = 10w - 6 = 54
10w - 6 = 54
10w = 60
w = 6
Answer: The width is 6 ft
The normal price of each cookie is $1.15 derived from the equation, c =today price of each cookie + 0.75
<u>Solution:</u>
Given, Today each cookie costs 0.75 less than the normal price.
Right now if you buy 7 of them it will only cost you 2.80
We have to write an equation to determine the normal price of each cookie(c)
And, we are given that, today 7 cookies cost 2.80
Let the cost of one cookie today be “n”
Then we get,
Today 7 cookies ⇒ 2.8
Then, 1 cookie ⇒ n
By criss cross multiplication we get,

Which means that, each cookie costs $0.4 today
Now, we know that,
<em>normal price of each cookie, c = today price of each cookie + $ 0.75 </em>
c = 0.4 + 0.75
c= 1.15
Hence, the normal cost of each cookie is $1.15 derived from the equation, c = today price of each cookie + 0.75
Answer:
Q:Why was the baby ant confused?
A:Because all it's uncles were ants!!
LOL SO BAD!!
Answer
the answer is D square root of 16 expression 3