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nasty-shy [4]
1 year ago
12

Y=x^2 -2x -3 im not sure how to solve this

Mathematics
1 answer:
netineya [11]1 year ago
5 0

Answer:

It is solved on a graph

Step-by-step explanation:

A quadratic graphical solution.

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an isosceles triangle has congruent sides of 20cm. the base is 10cm. find the height of the triangle.​
dolphi86 [110]

Answer:

\large\boxed{A_\triangle=25\sqrt{15}\ cm^2}

Step-by-step explanation:

Look at the picture.

The formula of an area of a triangle:

A_\triangle=\dfrac{bh}{2}

<em>b</em><em> - base</em>

<em>h</em><em> - height</em>

<em />

We need a length of a height.

Use the Pythagorean theorem:

leg^2+leg^2=hypotenuse^2

We have:

leg=5,\ leg=h,\ hypotenuse=20

Substitute:

5^2+h^2=20^2

25+h^2=400             <em>subtract 25 from both sides</em>

h^2=375\to h=\sqrt{375}\\\\h=\sqrt{(25)(15)}\\\\h=\sqrt{25}\cdot\sqrt{15}\\\\h=5\sqrt{15}\ cm

Calculate the area:

A_\triangle=\dfrac{(10)(5\sqrt{15})}{2}=\dfrac{50\sqrt{15}}{2}=25\sqrt{15}\ cm^2

8 0
3 years ago
Zorion’s mother helped him plan a budget. He had to put half of his money into savings. Whatever was left he split evenly into 3
Anastaziya [24]

Answer:

it's the first one because it is split as the paragraph said it should

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3 years ago
Halla ei valor de x en cada exprecion<br>mai​
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Answer:

<h2>Your answer...!!</h2>

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8 0
2 years ago
What is the serving of coffee? 1 quart, 1 ml, or 1 c
ruslelena [56]
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Solve the equation<br> x/2 -8=19
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Answer:

<u><em>54</em></u>

Step-by-step explanation:

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