The correct answer is: [D]: " -3x⁶ − 4x⁵ + 2x² + 8x + 4 " .
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Explanation:
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Given:
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" ( 4x² + 3x + 4) + ( -3x⁶ − 4x⁵ − 2x² + 5x) " ;
Rewrite as:
" ( 4x² + 3x + 4) + 1( -3x⁶ − 4x⁵ − 2x² + 5x) " ;
Note: The "1" is implied — since "1", multiplied by any value, is equal to that same value.
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Note the "distributive property of multiplication" :
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a(b + c) = ab + ac ;
a(b − c) = ab <span>− ac ;
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So, consider the following portion of the expression:
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" + 1 ( -3x⁶ − 4x⁵ − 2x² + 5x) " ;
= (+1 * -3x⁶) − (1 * 4x⁵) − (1 * 2x²) + (1 * 5x)
= − 3x⁶ − 4x⁵ − 2x² + 5x ;
Now, bring down the rest of the expression:
( 4x² + 3x + 4) − 3x⁶ − 4x⁵ − 2x² + 5x ;
= 4x² + 3x + 4 − 3x⁶ − 4x⁵ − 2x² + 5x
Combine the "like terms" ;
+ 4x² − 2x² = + 2x² ;
+ 3x + 5x = 8x ;
And we have:
" -3x⁶ − 4x⁵ + 2x² + 8x + 4 " ;
→ which is: Answer choice: [D]: " -3x⁶ − 4x⁵ + 2x² + 8x + 4 " .
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Answer:
√89 km ( = 9.43 km)
Step-by-step explanation:
refer to attached figures
Because we are given 2 sides of a right triangle, we can use the Pythagorean theorem to solve.
5² + 8² = x²
x² = 25 + 68
x² = 89
x = √89 ( = 9.43 km)
After you type in your equations and hit graph you notice that, if you are in the standard window, your parabola is cut off so you have to choose your "window" button to change the viewing window to see the whole graph. Then you would use your 2nd button and "trace" and "intersect" to find the points of intersection of the 2 graphs. The first point is at (-.90901, 16.81812) and the second point is at (5.9090909, 3.1818182). Graphing calculators are quite amazing!
Hey there! The answer is 30 hours!
Work: 500 - 200 = 300
15 x 20 = 300
200 + 300 = 500
I guess the answer will be 15, 10, and 25 am not sure tho