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Determine the number of times the 24 minutes bell will ring before 10:00a.m. Form all the inequalities that satisfies the region R in the figure below;

Mathematics

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  1. Tafuta usawa (equation) na usawa mdogo (inequality) kwa mstari L1.

    Mstari L1 ni mstari ulionyooka wa mlalo (horizontal line) unaopita kwenye y=4y=4.
    Eneo R liko chini au kwenye mstari huu.
    Hivyo, usawa mdogo wa kwanza ni:

    y≤4y \le 4
  2. Tafuta usawa na usawa mdogo kwa mstari L2.

    Mstari L2 ni mstari uliokatika (dashed line) unaopita kwenye pointi (0,−2)(0, -2) na (2,0)(2, 0).
    Mteremko (mm) wa mstari ni:

    m=0−(−2)2−0=22=1m = \frac{0 - (-2)}{2 - 0} = \frac{2}{2} = 1

    Kwa kutumia fomu ya y=mx+cy = mx + c, ambapo cc ni sehemu ya kukatiza mhimili wa y (yy-intercept), tuna c=−2c = -2.
    Hivyo, usawa wa mstari L2 ni y=x−2y = x - 2.
    Eneo R liko juu ya mstari huu. Kwa kuwa ni mstari uliokatika, usawa mdogo haujumuishi usawa.
    Hivyo, usawa mdogo wa pili ni:

    y>x−2y > x - 2
  3. Tafuta usawa na usawa mdogo kwa mstari L3.

    Mstari L3 ni mstari imara (solid line) unaopita kwenye pointi (0,0)(0, 0) na (1,2)(1, 2).
    Mteremko (mm) wa mstari ni:

    m=2−01−0=21=2m = \frac{2 - 0}{1 - 0} = \frac{2}{1} = 2

    Kwa kuwa mstari unapita kwenye asili (0,0)(0,0), sehemu ya kukatiza mhimili wa y ni c=0c=0.
    Hivyo, usawa wa mstari L3 ni y=2xy = 2x.
    Eneo R liko chini au kwenye mstari huu. Kwa kuwa ni mstari imara, usawa mdogo unajumuisha usawa.
    Hivyo, usawa mdogo wa tatu ni:

    y≤2xy \le 2x
  4. Tafuta usawa mdogo kwa mipaka ya mhimili wa x na y.

    Eneo R liko upande wa kulia wa mhimili wa y (x=0x=0) na juu ya mhimili wa x (y=0y=0).
    Hivyo, usawa mdogo wa nne na wa tano ni:

    x≥0x \ge 0 y≥0y \ge 0

    Usawa mdogo wote unaokidhi eneo R ni:

    y≤4y>x−2y≤2xx≥0y≥0\boxed{\begin{align*} y &\le 4 \\ y &> x - 2 \\ y &\le 2x \\ x &\ge 0 \\ y &\ge 0 \end{align*}}
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