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Mathematics 19 Online
OpenStudy (trwatkins1):

What is the value of the expression 1 – r – a when r = 20 and a = 6? A. –27 B. –25 C. –15 D. –13

OpenStudy (trwatkins1):

#confuseing

OpenStudy (anonymous):

B

OpenStudy (trwatkins1):

@JoannaBlackwelder

OpenStudy (joannablackwelder):

Substitute the values for the variables in the expression and let me know what you get.

OpenStudy (trwatkins1):

???

OpenStudy (trwatkins1):

1 – 20 – 6

OpenStudy (trwatkins1):

@JoannaBlackwelder

OpenStudy (anonymous):

the answer is B

OpenStudy (trwatkins1):

yea but i wanna know how to solve it

OpenStudy (joannablackwelder):

Yep, good!

OpenStudy (joannablackwelder):

And simplify.

OpenStudy (trwatkins1):

20-7

OpenStudy (joannablackwelder):

No, work from left to right. What is 1-20?

OpenStudy (trwatkins1):

19

OpenStudy (joannablackwelder):

Close, the larger number is negative, so the answer is negative.

OpenStudy (trwatkins1):

-19

OpenStudy (joannablackwelder):

Yep. Then what is -19-6?

OpenStudy (trwatkins1):

-13

OpenStudy (joannablackwelder):

No, a is positive 6, so it is -19-6

OpenStudy (trwatkins1):

*facepalm XD

OpenStudy (joannablackwelder):

It's cool :-)

OpenStudy (trwatkins1):

:)

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