Question #ea8d7

1 Answer
Oct 29, 2017

Use order of operations to get #-7.75#

Explanation:

You just have to use order of operations. Based on the acronym PEMDAS, the order is Parentheses, Exponents, Multiplication, Division, Addition, Subtraction

So we start with the expression #2+6-7\div sqrt(16)×9#

There aren't any parentheses.

There's the exponent on the 16 (square root is the same as to the power of 0.5), so let's deal with that. #sqrt16 = 4#. This changes the expression to: #2+6-7\div 4×9#

Now let's deal with the division. #7\div4=1.75#. This changes the expression to: #2+6-1.75×9#

Now let's deal with the multiplication. #1.75×9=15.75#. This changes the expression to : #2+6-15.75#

Now let's deal with the addition. #2+6# = 8. This changes the expression to: #8-15.75#

Finally we just need to do some subtraction. #8-15.75=-7.75#

So you're answer is #-7.75#