The area of a square is 100 cm². what is the perimeter?

Mathematics

2 answers:

BaLLatris [955]3 years ago

6 0

Answer:

40 cm

Step-by-step explanation:

a square has 4 equal length sides, to get area you multiply two of those sides, 10 x 10 = 100, so each side is 10cm long, adding all of the sides together gets you 40cm.

DochEvi [55]3 years ago

6 0

Answer:

40cm

Step-by-step explanation:

We know that the formula for area of a square is side length squared or $s^2$

In this case, $s^2=100$ . So we can go through the following steps in order to solve for s

$s^2=100\\\sqrt{s^2} =\sqrt{100} \\\\s=10$

If one side equals 10, and we know all squares have 4 equal sides, then we can multiple 10 * 4 or add 10+ 10 + 10 + 10.

Our outcome is 40!

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<h3>Answer: choice 4. f(x) and g(x) have a common x-intercept</h3>

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Explanation:

For me, it helps to graph everything on the same xy coordinate system. Start with the given graph and plot the points shown in the table. You'll get what you see in the diagram below.

The blue point C in that diagram is on the red parabola. This point is the x intercept as this is where both graphs cross the x axis. Therefore, they have a common x intercept.

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Side notes:

Choice 1 is not true due to choice 4 being true. We have f(x) = g(x) when x = 2, which is why f(x) > g(x) is not true for all x.
Choice 2 is not true. Point B is not on the parabola.
Choice 3 is not true. There is only one known intersection point between f(x) and g(x), and that is at the x intercept mentioned above. Of course there may be more intersections, but we don't have enough info to determine this.