Which expression is equivalent to this one?

–7(5 + 10)

A.
(–7) • 5 + (–7) • 10

B.
(–7) • 5 + 10

C.
(–7) + 5 + 10

D.
(–7) • 5 • 10
@paki @k_lynn

Question

Which expression is equivalent to this one?

–7(5 + 10)
 
 A.
(–7) • 5 + (–7) • 10
 
 B.
(–7) • 5 + 10
 
 C.
(–7) + 5 + 10
 
 D.
(–7) • 5 • 10
@paki @k_lynn

k_lynn · Answer

All you do is solve.  You have to follow the rules of PEMDAS.  So what is $$5+10$$ Then all you do is multiply by -7.

anonymous · Answer

uhm how would i multiply a negative number
?

k_lynn · Answer

https://www.khanacademy.org/math/pre-algebra/negatives-absolute-value-pre-alg/mult-div-negatives-pre-alg/v/multiplying-positive-and-negative-numbers This site is one of my favorites. It's super explanitory.

anonymous · Answer

You just multiply and if it's nn it equals a p
okay formulas, 
negative times positive = negative 
negative times negative = positive 
positive times positive = positive

k_lynn · Answer

explainatory**

anonymous · Answer

-105?

k_lynn · Answer

Right.  Now which one of those answers equals -107?

k_lynn · Answer

oops -105.

anonymous · Answer

B?

k_lynn · Answer

You got it! :)

anonymous · Answer

thanks! ^-^

idealist10 · Answer

The answer is A. You just distribute.

k_lynn · Answer

Ahh, you're right.  I did the math for A, but thought it was B :/

k_lynn · Answer

But the correct answer is A.  I'm so sorry :/