Mathematics
7 Online
OpenStudy (anonymous):
Help me with some problems please.
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OpenStudy (anonymous):
OpenStudy (hihi67):
1. d)
OpenStudy (hihi67):
2. a)
OpenStudy (hihi67):
3. a)
OpenStudy (hihi67):
I think. lol
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OpenStudy (travisbrown372):
c a b
OpenStudy (anonymous):
Is 1 A or C? lol
OpenStudy (travisbrown372):
c
OpenStudy (anonymous):
OpenStudy (travisbrown372):
1. c
2. a
3. b
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OpenStudy (hihi67):
No, it's not c!!!
OpenStudy (travisbrown372):
it is
OpenStudy (anonymous):
... Which is it...
OpenStudy (texaschic101):
1. x - 7 > 10
x > 10 + 7
x > 17 (C)
2. 3x <= 21
x <= 7 (A)
3. 5a - 2 < 18
5a < 18 + 2
5a < 20
a < 4 (B)
OpenStudy (hihi67):
But couldn't it also be d
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OpenStudy (travisbrown372):
i agree with @texaschic101
OpenStudy (travisbrown372):
@hihi67 no
OpenStudy (anonymous):
I trust texas's answer so im going with C
OpenStudy (texaschic101):
it cannot be d
OpenStudy (texaschic101):
:)
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OpenStudy (travisbrown372):
1. x - 7 > 10 x > 10 + 7 x > 17 (C) 2. 3x <= 21 x <= 7 (A) 3. 5a - 2 < 18 5a < 18 + 2 5a < 20 a < 4 (B)
OpenStudy (anonymous):
How about these?
OpenStudy (travisbrown372):
t>-2
OpenStudy (travisbrown372):
On average, Sari should read 40 pages per day to meet her goal. (200/5=40)
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OpenStudy (texaschic101):
2t + 8 >= -4(t + 1) -- distribute through the parenthesis
2t + 8 >= -4t - 4 -- add 4t to both sides
2t + 4t + 8 >= -4 -- subtract 8 from both sides
2t + 4t >= -4 - 8 -- combine like terms
6t >= -12 -- divide by 6
t >= -2
200/5 = 40 pages per day
OpenStudy (texaschic101):
at least 40 pages per day
OpenStudy (anonymous):
Ty how about this one?
OpenStudy (texaschic101):
15h >= 200 -- divide by 15
h >= 200/15
h >= 13.33 or 13 1/3 hours
answer A
OpenStudy (anonymous):
Sorry this was too big to fit into 1.
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OpenStudy (anonymous):
ok ppl, it is c