Let the variable of the equation be x.
Solution of the equation is given to us, hence,
x = -3 and x = 9
x + 3 = 0 and x - 9 = 0
Multiplying,
(x + 3)(x - 9) = x² - 9x + 3x - 27 = x² - 6x - 27
Hence, the linear equation with solution -3 and 9 is x² - 6x - 27.
Answer:
16.2 foot shadow
Step-by-step explanation:
Let the shadow cast by 27 foot tree be x.
Using ratio and proportions,
18 / 30 = x / 27
(18 x 27) / 30 = x
x = 486 / 30
x = 16.2
Answer:
neither
Step-by-step explanation:
Answer:
True.
Step-by-step explanation:
Combine like terms (terms with like variables and the same amount of them):
(4x + 3x) = 7x
7x + 5 = 7x + 5 (True) , ∴ 4x + 3x + 5 = 7x + 5
