Mathematics: -3r+15≥4(r-2) please help me

-3r+15≥4(r-2) please help me - id315427602791, juneham

Ответ:

LouiseKane1080

02.02.2022

-3r + 15 ≥ 4(r - 2)
-3r + 15 ≥ 4(r) - 4(2)
-3r + 15 ≥ 4r - 8
+ 3r    + 3r
   15 ≥ 7r - 8
      + 8    + 8
       23 ≥ 7r
      7    7
      3²/₇ ≥ r
      r ≤ 3²/₇

Solution Set: x ∈ (-∞, 3²/₇]

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Ответ:

FinnaCryDotJpeg

02.02.2022

Mathematics

−3r+15≥4r−8

Subtract 4r from both sides.

−3r+15−4r≥4r−8−4r

−7r+15≥−8

Subtract 15 from both sides.

−7r+15−15≥−8−15

−7r≥−23

Divide both sides by -7.

−7r/−7 ≥ −23/−7

r ≤ 23/7

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Ответ:

jadalysrodriguez

06.03.2021

Mathematics

-3> 4-2x If u a have to have the °C then it would be, -3°C>4°c-2°x

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