It is currently 21 Mar 2019, 11:53

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# The operation denoted by the symbol ♦ is defined for all rea

Author Message
TAGS:
Moderator
Joined: 18 Apr 2015
Posts: 5856
Followers: 94

Kudos [?]: 1145 [0], given: 5455

The operation denoted by the symbol ♦ is defined for all rea [#permalink]  08 Jan 2019, 10:40
Expert's post
00:00

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
The operation denoted by the symbol $$\blacklozenge$$ is defined for all real numbers p and r as follows. $$p \blacklozenge r = pr - p+ r$$ What is the value of $$(-4) \blacklozenge 5$$ ?

(A) $$- 9$$

(B) $$- 11$$

(C) $$- 19$$

(D) $$19$$

(E) $$21$$
[Reveal] Spoiler: OA

_________________
Director
Joined: 20 Apr 2016
Posts: 824
WE: Engineering (Energy and Utilities)
Followers: 10

Kudos [?]: 601 [1] , given: 121

Re: The operation denoted by the symbol ♦ is defined for all rea [#permalink]  09 Jan 2019, 04:28
1
KUDOS
Carcass wrote:
The operation denoted by the symbol $$\blacklozenge$$ is defined for all real numbers p and r as follows. $$p \blacklozenge r = pr - p+ r$$ What is the value of $$(-4) \blacklozenge 5$$ ?

(A) $$- 9$$

(B) $$- 11$$

(C) $$- 19$$

(D) $$19$$

(E) $$21$$

Explanation::

$$p \blacklozenge r = pr - p + r = (-4)(5) - (-4) + 5$$ = -20 + 9 = -11
_________________

If you found this post useful, please let me know by pressing the Kudos Button

Rules for Posting https://greprepclub.com/forum/rules-for ... -1083.html

Re: The operation denoted by the symbol ♦ is defined for all rea   [#permalink] 09 Jan 2019, 04:28
Display posts from previous: Sort by