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Nat2105 [25]
3 years ago
10

Is (-2,5) a solution to the inequality y<-3x+4 show steps

Mathematics
1 answer:
Fittoniya [83]3 years ago
6 0
We start with (-2,5) for y\ \textless \ -3x+4.  y\ \textless \ -3x+4&#10;&#10;5\ \textless \ 6+4&#10;&#10;5\ \textless \ 10  Yes.  This is true.
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ExtremeBDS [4]
Three times. The remainder would be 2.
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3 years ago
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15 men can do a piece of work in 80 days. If 5 more men are added, how long will it take to complete same piece of work?​
tresset_1 [31]

Answer:

Step-by-step explanation:

This is an inverse proportion.

men = k / Time         So first we need to find k

k = men * Time         Substitute values

k = 15*80

k = 1200  Notice the units are man days.

Now what happens if we increase the number of men to 20? What happens to the number of days.

20 = 1200 / time          Multiply both sides by time

20*time = 1200            Now divide by 20

time = 1200/20

Answer: time = 60 days

4 0
2 years ago
Simplify the expressions and find the value:
Dahasolnce [82]

Answer:

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Solve  \: 3y(2y−7)−3(y−4)−63 for y=−2 \\ First \:  simplify \:  it, \\ =6y2−21y−3y+12−63 \\ =6y2−24y−51 \\ Put \:  y=−2 \: =6(−2)2−24(−2)−51  \\  =6×4+48−51 \: 6×4+48−51 \\  24+48−51 \\ =21

3 0
3 years ago
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natta225 [31]
The normal body temperature : to = 37° C
An inequality is:
| t - to | ≤ 3
| t - 37 | ≤ 3
t - 37 ≤ 3     AND  ( - t - 37 ) ≤ 3
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t ≤ 40                     - t ≤ 3 - 37
                              - t ≤ - 34   / * ( - 1 )
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Answer:

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Step-by-step explanation:

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3 years ago
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