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Nadya [2.5K]
2 years ago
11

Can pls someone help me? and show how it did it?

Mathematics
1 answer:
Anestetic [448]2 years ago
7 0

Answer:

x\geq -3

Step-by-step explanation:

We can start by combining like terms:

(3x-7x)+(-5+2)\leq 9\\-4x-3\leq 9

We want to isolate x, so we must add 3 and divide by -4:

(-4x-3\leq 9)+3\\(-4x\leq 12)/-4\\\\x\geq -3

Because we had to divide by -4, the inequality sign had to flip.

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irinina [24]

Answer:

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Step-by-step explanation:

The height of the right triangle drawn to the hypotenuse is geometric mean of two segments of hypotenuse, so

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By the Pythagorean theorem,

x^2=12^2+z^2\\ \\x^2=144+6^2\\ \\x^2=144+36\\ \\x^2=180\\ \\x=6\sqrt{5}

and

y^2=z^2+3^2\\ \\y^2=6^2+9\\ \\y^2=36+9\\ \\y^2=45\\ \\y=3\sqrt{5}

5 0
3 years ago
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soldier1979 [14.2K]

Answer:

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Step-by-step explanation:

If I am piloting an airplane to prepare for landing, I change the plane's altitude from a meters to c meters, then the expression that represents the distance between two altitudes is given by |a-c| meters, not by |a+c|.

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But using the expression |a+c|, I will get the wrong answer as |1000 + 500| = 1500 meters.

8 0
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Step-by-step explanation:

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