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3 years ago

Negative divided by a negative is a

Mathematics

1 answer:

Papessa [141]3 years ago

3 0

Answer:

Positive

Step-by-step explanation:

A negative number divided by a negative number equals a positive number. Two negatives make a positive, so a negative number divided by a negative number equals a positive number.

Example: -/- = +

-10/-5=2

Have a good day and stay safe!

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The height of a triangle is 5 cm shorter than its base. If the area of the triangle is 25 cm2, find the height of the triangle.

Olin [163]

Answer:

$h = 5\ cm$

Step-by-step explanation:

Let's call B at the base of the triangle and call h at the height of the triangle. Then we know that:

The height of a triangle is 5 cm shorter than its base. This means that:

$h = B-5$ .

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By definition the area of a triangle is:

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For this triangle we know that $A = 25\ cm^2$ and $h = B-5$ . We substitute these values in the equation and solve for B.

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In this case note that: $a=0.5,\ \ b=-\frac{5}{2}\ \ c=-25$

Then:

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$B=\frac{\frac{5}{2}\±\sqrt{\frac{25}{4}+50}}{1}$

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The solutions are:

$B_1=\frac{5}{2}+\frac{15}{2}=10$

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For this problem we take the positive solution.

$B=10\ cm$

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