(-2)(4)+5[6-(-5)=

Question

I need help I'm trying to pass an LPN entry test

Answer 1

(-2)(4)+5[6-(-5)=

I added a bracket to complete the expression, which should be (-2)(4)+5[6-(-5)] =

 

We have to perform the operations in accord with algebraic rules, which means the functions inside the brackets must be done first, then multiplication, subtraction, and finally addition.

 

So, (-2)(4)+5[6-(-5)] = becomes (-2)(4)+5[11]=

Then, (-2)(4)+5[11]= becomes -8 + 55 = which equals +47

Answer 2

You'll want to follow order of operations:

 

Parentheses

Exponents

Multiplication and Division

Addition and Subtraction

 

 

First, let's deal with the parentheses:

 

[6-(-5)] = [6+5] = [11]

 

 

That gives you:

 

(-2)(4) + 5[11]

 

 

Now, there are no expressions left in parentheses (just single numbers in parentheses), so let's check for exponents. There are none of those, so let's take care of multiplication and division:

 

(-2)(4) = -8

5[11] = 55

 

 

That gives you:

 

-8 + 55

 

 

Finally, there's no more multiplication or division, so let's take care of addition and subtraction:

 

-8 + 55 = 47

 

 

Your final answer is 47.