Please help! Thank you :)
What is –5 • 8 • (–7)?
A.
–280
B.
–240
C.
240
D.
280
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OpenStudy (anonymous):
D.
OpenStudy (anonymous):
d
OpenStudy (anonymous):
(- 5 * 8) = -40 * (-7) = 280
OpenStudy (anonymous):
When you multiply by two negatives, you get a positive
OpenStudy (anonymous):
-5x8=-40*-7 =280, as rule negative times a negative is positive.
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OpenStudy (anonymous):
oOhh okay i see. Could one of you help me with this other question
?
OpenStudy (anonymous):
Yes.
OpenStudy (anonymous):
What is the value of the expression |x + y| when x = –7 and y = 18?
A.
–25
B.
–11
C.
11
D.
25
OpenStudy (anonymous):
Sure
OpenStudy (anonymous):
Plug in -7 for x and 18 for y and take the absolute value
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OpenStudy (anonymous):
how would i do that?
OpenStudy (anonymous):
It's C.
OpenStudy (anonymous):
11
OpenStudy (anonymous):
Negative - a positive is positive.
OpenStudy (anonymous):
so after you do the math, you get 11 and because it is not a negative, you don't have to worry about making the change to the absolute value of a number
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OpenStudy (anonymous):
For example,
-11 + 3 = -8
Because the negative number has more value then the positive..
Therefore the sum is negative.
:)
OpenStudy (mathstudent55):
@xjakester
Be careful with your statements.
You wrote
"Negative - a positive is positive."
This is not true.