We know the triangle is an isosceles triangle. So, we use the Pythagorean Theorem.
a^2+b^2=c^2
The c would be 22, because it's the longest edge. Now find a or b. They are the same, that is how you find the two sides of the triangle for part A.
To find the area of the triangle, the forumla is a=hb/2
Plug in the numbers for that formula and the answer would be found for part B.
I hope I helped.
Answer:
(-2, 3)
Step-by-step explanation:
<u>Substitute 2x + 7 for y in y = -2x - 1</u>
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Add 2x to both sides
Subtract 7 from both sides.
Divide both sides by 4.
<u>Substitute -2 for x in y = 2x + 7</u>
- <u></u>
Simplify both sides.
Therefore, the answer is (-2, 3).
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You can use the FOIL method (First, Outer, Inner Last) as how most people prefer it.
5x*4x=20x^2
5x*4=20x
2*4x=8x
2*4=8
Combine them all together and you get 20x^2 + 28x +8
I hope this helps.
Im pretty sure the answer is ray. :)
