Answer:
D. A 90° clockwise rotation about the origin
Answer:
130°
Step-by-step explanation:
<span><span>(<span><span>2x</span>−9</span>)</span><span>(<span><span>4x</span>+1</span>)</span></span><span> =<span><span>(<span><span>2x</span>+<span>−9</span></span>)</span><span>(<span><span>4x</span>+1</span>)</span></span></span><span> =<span><span><span><span><span>(<span>2x</span>)</span><span>(<span>4x</span>)</span></span>+<span><span>(<span>2x</span>)</span><span>(1)</span></span></span>+<span><span>(<span>−9</span>)</span><span>(<span>4x</span>)</span></span></span>+<span><span>(<span>−9</span>)</span><span>(1)</span></span></span></span><span> =<span><span><span><span>8<span>x^2</span></span>+<span>2x</span></span>−<span>36x</span></span>−9</span></span><span> Answer: <span><span><span>8<span>x^2</span></span>−<span>34x</span></span>−<span>9</span></span></span>
Elimination is used when there is a common factor between the two equations. Substitution is used in cases where finding a common term just isn’t possible, or too complicated.
The formula for the area of a right triangle = (1/2)(base)(height)
x = the height
Area = (1/2)(10)(x)
= 5x
Now, bring in the "greater than or equal to 8 square feet" part of the problem.
5x ≥ 8