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Daniel [21]
2 years ago
5

12-2x^2/-5x where x=-4

Mathematics
1 answer:
Viktor [21]2 years ago
7 0

Answer:

10.4

Step-by-step explanation:

to simply solve the expression we will  insert the known value of x into the expression and evaluate.

12-2x^2/-5x

12 - 2x²/-5x given that x = -4

= 12 - 2 (-4)²/ -5(-4)

= 12 - 2(16)/ 20

= 12 -32/20

don't forget to the BODMAS rule

B...................... bracket

O................. of

D..........................................division

M................................ multiplication

A................................ addition

S.................................. subtraction

so we have,

12 - 32/20

12 - 8/5

find the lcm

60 - 8/5

52/5

10.4

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aev [14]

Answer:

There are total 30 books in the 5 feet high stack of books.

Step-by-step explanation:

The complete question is

Given, Each note book is 2 inches thick, How many notebooks do you think it would take to make a stack that is 5 feet high

Solution

Thickness of each book = \frac{2}{12}  = \frac{1}{6}

The total height of the book stack is 5 feet.

The number of books in the stack is equal to total height of the stack divided by the thickness of one book

Number of books in five feet high stack is

\frac{5}{\frac{1}{6} } \\5 * \frac{6}{1} \\30

Hence, there are total 30 books in the 5 feet high stack of books.

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