Mathematics
22 Online
OpenStudy (anonymous):
will medal and fan
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OpenStudy (anonymous):
What is the sum?
–18 + (–14)
A.
–32
B.
–4
C.
4
D.
32
OpenStudy (anonymous):
@Mehek14
OpenStudy (anonymous):
@Michele_Laino
OpenStudy (anonymous):
-32
OpenStudy (michele_laino):
here we have to compute this:
\[ \Large - 18 + \left( { - 14} \right) = - 18 - 14 = ...?\]
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OpenStudy (anonymous):
What is the value of d + e + f when d = 20, e = –4 and f = –2?
A.
–26
B.
–22
C.
14
D.
18
OpenStudy (michele_laino):
since the subsequent rule holds:
+ * - = -
OpenStudy (michele_laino):
we have to replace d, e, f with their corresponding values:
\[\Large 20 + \left( { - 4} \right) + \left( { - 2} \right) = 20 - 4 - 2 = ...?\]
OpenStudy (anonymous):
is it a
OpenStudy (michele_laino):
I'm sorry, a) is a wrong option
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OpenStudy (anonymous):
c
OpenStudy (michele_laino):
yes!
OpenStudy (anonymous):
that was my 2 answer
OpenStudy (anonymous):
Which statement is true?
A.
–14 + 21 = –24 + 17
B.
16 + (–6) > 24 + (–13)
C.
–14 + (–10) > 2 + (–28)
D.
–10 + (–8) > –12 + (–4)
OpenStudy (anonymous):
b
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OpenStudy (michele_laino):
let's see...
left side is:
16+(-6)=16-6=...?
OpenStudy (michele_laino):
please wait a moment, take your time
OpenStudy (anonymous):
22????????????????????????????
OpenStudy (anonymous):
@Michele_Laino
OpenStudy (anonymous):
@Mehek14
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OpenStudy (anonymous):
D. 32
OpenStudy (michele_laino):
16-6=10 whereas the right side is:
24+(-13)= 24-13= 11
so being 10 different from 11, option B) is wrong